Zelda is a plant geneticist and needs to see the internal details of plant cells. She needs a very high power of resolution. Which microscope should she choose?
O Compound light microscope
O Common light microscope
O Dissecting microscope
O Scanning electron microscope

Answers

Answer 1

Answer:

'Scanning electron microscope' is the correct answer because two types of electron microscope are used to study plant cells in culture, the transmission (TEM) and scanning (sem) electron microscopes. with the TEM, the electron beam penetrates thin slices of biological material and permits the study of internal features of cells and organelles

Explanation:

Source: https://link.springer.com/chapter/10.1007/978-3-642-79048-5_18

Zelda Is A Plant Geneticist And Needs To See The Internal Details Of Plant Cells. She Needs A Very High

Related Questions

Which of the following statements is MOST accurate?
a. Most people who engage in gambling activities become addicted to it
and end up taking bankruptcy because they cannot pay their bills.
b. People at lower income levels lower use a larger percentage of their
income to buy lottery and scratch tickets than people at higher levels of
income.
c. Gambling is a moral issue, with little or no economic or financial impact
on individuals or society.
d. Casinos only have a positive impact on communities because they create
jobs and generate wealth.

Answers

Answer:

C

Explanation:

The sticky mass in some chemicals on heating was known as _______________________ fibre or fibre _________.

Answers

Answer:

Americans chemical society

These penguins are all members of the species Aptenodytes patagonicus.

Answers

Answer:

Organisms of the same species can live in different areas, while organisms of the same population live in only one area.

Explanation:

Answer:

Option D

Explanation:

Populations are all in one area

What two distinct features do sound waves have?
Amplitude and frequency
Frequency and decibels
Volume and amplitude
Volume and decibels
Frequency and volume

Answers

Answer:

amplitude and frequency

The group members met on Saturday working on the project together.

Which revision corrects the error in the sentence?

The group members who were working on the project together met on Saturday.
Working on the project together on Saturday, the group members met.
On Saturday, the group members who were working on the project met together.
The group members met working on the project together on Saturday.

Answers

Answer:

Working on the project together on Saturday, the group members met

Answer:

The answer is B.

Explanation:

Why are genetically engineered mammalian cells sometimes needed to produce certain proteins instead of genetically engineered bacteria?
A. Mammal cells are larger and can produce greater volumes of protein.
B. Mammalian cells are not needed; bacterial cells can produce the same proteins as long as they have the gene that codes for it.
C. Mammal cells have more precise restriction enzymes.
D. Bacteria make proteins differently than mammals, and cannot make certain human proteins.

Answers

Answer:

C

Explanation:

As mammal cells have more precise restriction enzymes, it sometimes needed instead of bacteria. The correct option is C.

What is genetic engineering?

Genetic engineering also referred to as genetic modification is a process that uses laboratory-based technologies to alter an organism's DNA makeup.

Because mammalian cells have more precise restriction enzymes, it is sometimes necessary to use them instead of bacteria.

Herbert Boyer and Stanley Cohen, biochemists, create genetic engineering in 1973 by implanting DNA from one bacteria into yet another.

There are three basic stepping stones to genetic engineering. These are:

Isolating DNA fragments from a donor organism.Inserting an isolated donor DNA fragment into a vector genome.Growing a recombinant vector in an appropriate host.

Thus, the correct option is C.

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What will be the impact on productivity of plant if CO2 reduction stops during photosynthesis?​

Answers

Answer:

As carbon dioxide concentrations increase, the pores don't open as wide, resulting in lower levels of transpiration by plants and thus increased water-use efficiency.

Explanation:

The diagram below shows a light ray striking Medium A and Medium B at the same angle. (4 points)

A rectangle labeled Medium A is drawn on the left. A ray of light travels through air and strikes the surface of medium A making an angle of 50 degrees with the vertical. The light ray bends towards the vertical as it travels through Medium A and makes an angle of about 15 degrees with the vertical. A rectangle labeled Medium B is drawn on the right. A ray of light travels through air and strikes the surface of medium B making an angle of 50 degrees with the vertical. The light ray bends towards the vertical as it travels through Medium B and makes an angle of about 25 degrees with the vertical.

Which statement is correct?
The speed of the light ray is the same in air and Medium A.

The speed of the light ray is the same in air and Medium B.

Medium A and Medium B have different densities because light refracts at different angles.

Medium A and Medium B have the same density because the light ray strikes both at the same angle.

Answers

Answer:

A the speed of the light ray is the same in air and medium

Write down the functions of
1.microtubules
2.tripletsof microtubules

Answers

Answer:

Microtubules are filamentous intracellular structures that are responsible for various kinds of movements in all eukaryotic cells. Microtubules are involved in nucleic and cell division, organization of intracellular structure, and intracellular transport, as well as ciliary and flagellar motility

Centrioles are cylindrical structures that are made up of protein tubes called microtubules. Specifically, nine groups of three microtubules, known as triplet microtubules, are linked together to make the walls of the cylinder.

Hope it helps :)

Answer:

Microtubules have several functions. For example, they provide the rigid, organized components of the cytoskeleton that give shape to many cells, and they are major components of cilia and flagella (cellular locomotory projections). They participate in the formation of the spindle during cell division (mitosis).

triplet microtubules are linked together to make the walls of the cylinder.

Explanation:

Question 7 of 10
A cell membrane is very specific about what it allows across. How does this
help the cell?
O A. Transport proteins allow only enzymes to pass through the
membrane.
O B. It is better for the cell if most molecules are prevented from
entering.
O C. The cell works better when it contains fewer proteins.
D. It helps the cell absorb as many different molecules as possible.

Answers

Answer:

The answer is D

Explanation:

As the cell is mostly dependant on ingested materials so this will help the cell to grow and perform other important activities in the cell

A tube with a membrane covering the bottom is placed in a beaker. The membrane allows water to flow through but not salt or glucose. The tube contains an aqueous solution with 4% salt and 20% glucose and the beaker contains an aqueous solution with 12% salt and 6% glucose. How could you describe the solution in the beaker compared to the solution in the tube

Answers

Answer:

The solution in the tube is hypertonic to the solution in the beaker.

Explanation:

To compare the solutions, find the total amount of solutes in both the tube and beaker.

The tube has 4% salt and 20% glucose, so it has 24% solute.

The beaker has 12% salt and 6% glucose, so it has 18% solute.

Since 24 is larger than 18, this means the tube has more solute.

Since the tube has more solute and less water compared to the beaker, it is hypertonic to the beaker.

So, the answer is that the solution in the tube is hypertonic to the solution in the beaker.

Solutions are hypertonic or hypotonic to other solutions according to their solute concentration grade. In the exposed example, the beaker aqueous solution is hypotonic to the tube solution, meaning it is less concentrated.

--------------------

Available data:

The membrane allows water to flow through but not salt or glucoseThe tube contains an aqueous solution with 4% salt and 20% glucoseThe beaker contains an aqueous solution with 12% salt and 6% glucose

We need to describe and compare solutions.

To do it, first, we will review some theoretical framework.

When talking about solutions in compartison with the cell content, we can classify them as follows,

HYPERTONIC ⇒ A hypertonic solution has a higher concentration of solute than the cell. This means that in the cell interior, the solute concentration is lower than in the solution itself.

ISOTONIC ⇒ The solute concentration is the same inside the cell and outside.

HYPOTONIC ⇒ A hypotonic solution has a lower concentration of solute than the cell. This means that in the cell interior, the solute concentration is higher than in the solution itself.  

When a cell is in a hypotonic solution, through osmosis, water moves toward the cell.  

Osmosis is the phenomenon that occurs when two dilutions of different concentrations -in this example, the interior of the tube and the beaker- are separated by a semipermeable membrane.

The membrane allows the pass of water but not solute. Hence, water can move from the most diluted side to the less diluted one.  

What we need to consider is

• When a cell with semipermeable membrane is placed in a hypotonic solution, water enters the cell.

• When a cell with semipermeable membrane is placed in an isotonic solution, there is no water movement.

• When a cell with semipermeable membrane is placed in a hypertonic solution, water gets out of the cell.

In simple words, in the proposed experiment, glucose and salt -solutes- can not cross the membrane, but water can. The tube represents a cell. So,

The tube has 4% salt and the beaker 12 % saltThe tube has 20% glucose and the beaker 6% glucose.

To make the analysis easier, we can add the concentration percentages of glucose and salt at each side of the membrane, and then compare them.

The tube contains an aqueous solution with 24% solute (4% salt + 20% glucose)The beacker contains an aqueous solution with 18% solute (12% salt + 6% glucose)

We can see that the concentration of solute is higher in the interior of the tube than in the beaker. This difference suggests that water will move forward to the tube interior.

According to this analysis, we can say that

The tube aqueous solution is hypertonic to the beaker solution → More concentrated

The beaker aqueous solution is hypotonic to the tube solution → Less concentrated

---------------------------------------------

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. Q.. List any two advantages associated with water stored in the ground.​

Answers

Answer:

It does not evaporate.

It recharges wells near the area.

It provides moisture to the vegetation.

It does not provide breeding grounds for mosquitos , like stagnant water in lakes and ponds.

It is relatively protected from contamination by animal and human waste.

Explanation:

. Most of the matter in the universe: A. Exists within stars B. Is made when planets are formed C. Is unknown, called dark matter and energy D. Is blue-shifted

Answers

Answer:

B

Explanation:

is made when planet are formed

Which of the following is an example of a
homologous trait?
A. the wings of bees and birds
B. the forearm of different animals
C. the DNA of land animals

Answers

Answer:

the wings on bees and birds

An example of a homologous trait is the wings of bees and birds. The correct option is A.

What are homologous traits?

The Theory of Evolution can be used to explain the homologous features of related species. According to this hypothesis, species develop over time from a common progenitor.

In order to adapt to the new environment, species separated from one another and developed new features. The variety of species observed on Earth today is the result of a process known as speciation.

The homologous features that are shared by related species are proof of their shared ancestry. For instance, despite being different, the wings of a bat and a bird share characteristics.

Therefore, the correct option is A. the wings of bees and birds.

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make a molecule between 87Fr^+ and 6C^-4

Answers

Answer:

gdshmsdh b

hhfdycjmncd

Explanation:

csbnmbvdfhdfg

Help me please picture included

Answers

Answer:

umm I'm sorry but the picture is not coming like I mn its blank

What sources must health care workers use when deciding which abbreviations and symbols to use on the job?
a. Those listed in their textbooks
b. Those approved by the facility in which they work
c. Those listed in medical dictionaries and reference books,
d. Those provided by their professional organization.

Answers

B is the correct answer
The correct answer is b

The Pasteur effect shows that yeast consume glucose at a higher rate under anaerobic conditions than under aerobic conditions. Which of the following statements correctly explains this observation?
A. Less ATP is made under anaerobic conditions, so more glucose must be consumed to produce an equivalent amount of ATP.
B. Yeast are photosynthetic, so they are able to produce their own oxygen.
C. This observation is incorrect.
D. Aerobic conditions mean that cells make more ATP and use more glucose.
E. Yeast are obligate anaerobes, so aerobic conditions will kill yeasts.

Answers

According to what I’ve learned in middle school the answer is E
Hope that was helpful <3

Can someone please help me!

Answers

The answer is C.

It is the site of gas exchange in the lungs.

Gas exchange occurs only in alveoli. Alveoli are made of thin-walled parenchymal cells, typically one-cell thick, that look like tiny bubbles within the sacs. Alveoli are in direct contact with capillaries (one-cell thick) of the circulatory system.

An ecologist studied the same species of deer during the summer and the winter. She noticed that during the summer, when there was plenty of food, the deer were energetic and playful. However, during winter when food was scarce, the deer moved more slowly and did not run unless they needed to escape a predator.

Which scientific fact is best supported by her observations?
A.
Some deer species will eat the bark of trees.
B.
Food is the fuel that gives animals energy.
C.
Food provides building materials that animals use to grow.
D.
Carnivores eat primarily the meat of other animals.

Answers

The answer is B. When the deer did have food, it fueled their ability to move around but as the food supply went down, they did not have fuel, therefore explaining why they “moved more slowly”.

If your body lacks enzymes that break down carbohydrates, it would be unable to get __A__ for energy production. If you lacked the enzyme to digest proteins, you may not absorb enough __B__.

Answers

Answer:

Glucose and amino acid.

Explanation:

If your body lacks enzymes that break down carbohydrates, it would be unable to get glucose for energy production while on the other hand, if you lacked the enzyme to digest proteins, you may not absorb enough amino acid that our body needs for the formation of muscles. Enzymes play a great role in the breakdown of macro food particles into simpler molecules so that it can be absorbed by the cells.

Answer:

A: Sugar Molecules

B: Amino Acids

Hope this helps!

Explanation:

if the velocity of a vehicle starting from rest reaches 5m/2s in 2seconds, is the velocity of the vehicle uniform ?explain.​

Answers

Explanation:

Avg speed × total times = total distance

20×25=500

Since acceleration in the 1st interval is same as deceleration in the 3rd interval and deceleration is from the same velocity achieved after acceleration, t

1

=t

3

s

1

=

2

1

×5t

1

2

s

2

=(5t

1

)t

2

s

3

=(5t

1

)×t

3

2

1

×5×t

1

2

=(5t

1

)×t

1

2

1

×5×t

1

2

s

1

+s

2

+s

3

=5t

1

t

2

+5t

1

2

⇒5t

1

2

+5t

1

t

2

=500−−−−1

2t

1

+t

2

=25−−−−2

Solving (1 ) and (2) ⇒t

1

=5,t

2

=15sec

IN YOUR OWN WORDS, what is the definition for Zygote?

Answers

Answer:

Zygote, fertilized egg cell that results from the union of a female gamete (egg, or ovum) with a male gamete (sperm). In the embryonic development of humans and other animals, the zygote stage is brief and is followed by cleavage, when the single cell becomes subdivided into smaller cells.

the cell produced by the union of two gametes, before it undergoes cleavage.

What is a photosynthetic pigment

A. A man-made compound that reacts to light
B. An oxygen based compound that captures light energy.
C. A light sensitive compound that changes color.
D. A colored compound that captures light energy.

Answers

Answer:

Answer D is correct.

Explanation:

A colored compound that captures light energy.

This photosynthetic pigment means the pigment which is present in chloroplasts to absorb or capture the light energy to do photosynthesis.

Hope this helps you

why is rna a polymer and a macromolecule

Answers

Answer:

RNA is a polymer because it is made up of many monomers called nucleotides. Moreover, RNAs can form macromolecules because many RNAs are large molecules (i.e., polynucleotide chains).

Explanation:

Ribonucleic acid (RNA) can be defined as a single-stranded nucleic acid polymer of the four nucleotides. In RNA, each nucleotide is composed of a 1-ribose sugar, a 2-phosphate group and 3-one of four types of nitrogenous bases: Adenine (A), Cytosine (C), Guanine (G), and Uracil (U), which are covalently bonded to form polynucleotide chains. There are different types of RNAs such as mRNA, tRNA, rRNA, miRNA, circ-RNAs, lncRNAs, etc. Many of these RNAs form large single-stranded (ss) molecules, i.e., polynucleotide chains. For example, an mRNA sequence may have a length of 5,000 nucleotides (5 kb) or even more, and there are RNA viruses that have more than 20000 nucleotides (20 kb) in length.



How does random mating keep a
population in Hardy-Weinberg
Equilibrium?

A. Choosing a random mate creates variation which helps
the population evolve.

B. Individuals choose their mates causing only certain
traits to be passed on.

C. Mates aren't chosen based on traits so all alleles are
equally likely to be passed on.

D. When all the females of a population randomly choose a
mate and only certain alleles get passed on.

Answers

Answer:

A

explanation:

what is G1 phase in cell?​

Answers

Answer:

The g₁ phase, gap 1 phase, or growth 1 phase, is the first of four phases of the cell cycle that takes place in eukaryotic cell division. In this part of interphase, the cell synthesizes mRNA and proteins in preparation for subsequent steps leading to mitosis. 


Which of the following statements about the Green Revolution is true?
A. The Green Revolution increased the biodiversity of crops grown around the world.
B. The Green Revolution bettered the environment by encouraging less fertilizer and
pesticide use.
C. The Green Revolution allowed countries that previously imported crops to become
crop exporters.
D. The Green Revolution was applied in the Americas but didn't have a global
impact.

Answers

B) THE green revolution bettered the environment.........

The Green Revolution allowed countries that previously imported crops to become

crop exporters.

What is the Green Revolution?

The Green revolution refers to the period of cultivation of high-yielding crops varieties especially grains by farmers beginning in the period of the 1940s to l960s.

The Green revolution resulted in increased food production among countries that usually imported food, so they became exporters.

Therefore, the Green Revolution allowed countries that previously imported crops to become

crop exporters.

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What is the best definition for the term 'peer review?'
o
A. When you are given of review of how well you work by your coworkers.
B. When research is scrutinized and re-tested by others who are experts in the same area.
C. When people of the same age read each other's work.
D. When research is published to the general public for them to form opinions on it.
Reset Selection

Answers

A. When you are given of review of how well you by your co workers

Are there possible risks/harms that the genetic engineering process can cause to the public? How could this be prevented/minimized? How would humans benefit from this process?

Answers

Answer:

Harms: May cause nasty diseases and all sorts of bad things if not engineered properly.

We would benefit by basically being where we are now. We used a lot of genetic engineering to get our technology to the point it is now.

Explanation: Kind of hard to turn back from genetic engineering as it is a potentially useful process.

Other Questions
6. Write the missing adjectives. (1) Good younger (71) The boy is than him assignment argument essay Finalize and submit your five-paragraph essay. Your must contain a minimum of two information sources obtained through research and one interview.Acknowledge your information sources with correctly formatted in-text citations, and include a correctly formatted works cited page.Make sure you have includedA strong introduction with a thesis and a hook.Reasons that support your argument.Credible evidence to support both your argument and counterclaims.A conclusion that restates your claim and position and may include a call to action. In-text citations A works cited page. Fitness Fanatics is a regional chain of health clubs. The managers of the clubs, who have authority to make investments as needed, are evaluated based largely on return on investment (ROI). The company's Springfield Club reported the following results for the past year: Sales $780,000 Net operating income $17,940 Average operating assets $100,000The following questions are to be considered independently. Required:Compute the Springfield club's return on investment (ROI). A company has total revenue of $50,000,000, cost of sales of $40,000,000, operating expenses of $5,000,000, and financing costs of $2,000,000. What are earnings per share if the company has 100,000 shares outstanding and no preferred stockholders what are the mode higth and average hight in the US(of)A of humans?I will give brainly I need help best answer gets brainly!!! A.) AntonymB.) CharacteristicC.) TypeD.) Synonym Derek had a bill of $29 last month on he Call-a-Lot Plan. How many minutes did he use? Matt is making cookies. He adds 3 over 4 cup of sugar to a bowl. He then removes two 1 over 8 cups of sugar. Which of the following best explains the amount of sugar left in the bowl? BusCorp wants to introduce a new procedure to improve how customer requests are handled. This change will require employees to break old routines and adopt new role patterns. They decide to adopt two new programs, one in which employees learn how to work as teams as the company changes. The other involves forming task forces within the company to help determine ne customer service practices.The formation of task forces to minimize resistance to change is known as:_______.A. communication.B. learning.C. stress management.D. negotiation.E. employee involvement. Sylvia mused to herself, "It has taken over 30 years, but I've finally been named CEO of a major firm. Now, I can concentrate on what I really want to do as a(n) ____________ manager, to focus on the survival, growth, and overall effectiveness of our firm." How were media perceived in the early days? How have this perception changed? Jill and Kane, with their attorneys, meet to try to resolve a dispute. A neutral third party works with both sides and proposes a solution, but does not make a decision resolving the matter. This is:____.a. arbitration. b. negotiation. c. mini-trial. d. mediation. Frank is a 60- year-old man who is well-loved in his community since he was a boy. He is someone who is outgoing, a party lover, and love to have fun hanging out with peers. Frank is confident about life. From an early age he knew exactly what he wanted to become, and now as a man, he is confident about his career and family and want to leave them a good life when he departs this life. Frank express that he is not afraid of dying but he wants them to be ok when he is gone. At work Frank is helpful to his colleagues, and even in his community he is well-known among the elderly since he is always putting on Christmas treats for them. Imagine that Frank is your colleague, and that your boss asks you to write a character reference for Frank. Using Jungs personality theory to guide your writing, present a minimum one- page character reference in which you spell out Franks behaviour, his outlook on life, his philosophy about people and all the other important things you know about him. Ensure you point out how these different parts of Franks life fits into Jungs theory and overall what Jungs theoretical concept says about him. 1Work out the area of the shape:3cm6cm2cm2cm . Read the situations and then write sentences, using past perfect continuous.1. The two boys came into the house. One had a black eye and the other had a cut lip.(they/ fight)- They ..2. Tom was watching television. He was feeling very tired. (he / study / hard all day) He .3. When I walked into the room, it was empty. But there was a smell of cigarettes. (somebody / smoke/ in the room) Somebody.....4. When Mary came back from the beach, she looked very red from the sun. (she / lie / in the sun toolong) She .5. The two boys came into the house. They had a football and they were both very tired. (they / play/football) They 6. Ann woke up in the middle of the night. She was frightened and she didnt know where she was.(she / dream) She ...II. Put the verb into the correct form, past perfect continuous or past continuous.1. Tom was leaning against the wall, out of breath. He (run).2. I tried to catch Tom but I couldnt. He (run) very fast.3. Jim was on his hands and knees on the floor. He (look).. for his cigarettes lighter.4. We (walk) along the road for about 20 minutes when a car stopped and the driver offeredus a lift.5. When I arrived, everyone was sitting round the table with their mouths full. They(eat)6. When I arrived, everyone was sitting round the table and talking.Their mouths were empty but theirstomachs were full. They (eat).7. When I arrived, Ann (wait) for me. She was rather annoyed with me because I was lateand she (wait).. for a very long time.III. Give the correct form of verbs, using present perfect continuous or past perfect continuous.1. It is midnight, I (study)_________________ for five straight hours. No wonder Im getting tired.2. It was midnight, I (study)_________________ for five straight hours. No wonder I was getting tired.3. Jack suddenly realized that the teacher was asking a question. He couldnt answer because he(daydream)________________ for the last ten minutes.4. Wake up! You (sleep)______________ long enough. Its time to get up.5. At last two hundred people were waiting in line to buy tickets to the game. Some of them(stand)_____________ in line for more than four hours. We decided not to try to get tickets forourselves. A debit balance is the bank statement indicates? 1. Mi hermano y yo BLANK en cinco minutos y salimos. (vestirse)2. Por qu BLANK una ensalada? No te gustan las verduras. (pedir)3. En qu mercado BLANK t esas frutas? (conseguir)4. Despus de la cena yo BLANK caf. (servir)5. Anoche mis amigos BLANK comida guatemalteca. (servir)6. El domingo pasado BLANK quedarnos en casa. No salimos. (preferir)7. A qu hora BLANK los chicos anoche? (dormirse)8. Dices que Ana Mara nunca BLANK tu secreto? No lo creo! (repetir)9. En qu ao BLANK el presidente Kennedy? (morir)10. Sebastin no BLANK bien en el tren. (dormir) write your answer in simplest radical form suggest and motivate at least four ways by which these farming methods could be made humane