Short Answer Questions
What TWO things are necessary for evolution by natural selection to
occur?

Answers

Answer 1
Selective pressure and an adaptation. Having the adaptation allows the organism to survive long enough to pass their genes. Without a selective pressure, the adaptation would just be a trait

Related Questions

3. DNA and Protein similarities are often used for molecular evidence of evolution. What is being compared to show relatedness among species? Explain how this works.​

Answers

Answer:

The sharing of common ancestors

……………,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

Answers

Answer:

these r so many which one?

Explanation:

Drag the tiles to the correct boxes to complete the pairs.
Match the mRNA sequences to their DNA sequences.
AUUACGCAU
CCGAAAUGU
GAUCAUUAC
UUUUUAACG
AAAAATTGC
arrowRight
GGCTTTACA
arrowRight
TAATGCGTA
arrowRight
CTAGTAATG
arrowRight

Answers

Answer:

mRNA sequence1=AUUACGCAU

DNA sequence1=TAATGCGTA

mRNA sequence2=CCGAAAUGU

DNA sequence2=GGCTTTACA

mRNA sequence 3=GAUCAUUAC

DNA sequence3=CTAGTAATG

mRNA sequence4=UUUUUAACG0

DNA sequence4=AAAAATTGC

A researcher crossed two plants, and informed an assistant researcher to determine the genotypes and phenotypes of the plants that were crossed by analyzing the offspring. The assistant counted 30 plants with green pods and 10 plants with yellow pods. Which of the following conclusions can accurately be made by the assistant?

a. The researcher had selfed a true-breeding plant with green pods.
b. The researcher had crossed true-breeding plants of differing pod colors.
c. The researcher had crossed two heterozygous plants.
d. The researcher had crossed two plants with yellow pods.
e. The researcher had crossed a plant with green pods to a plant with yellow pods.

Answers

Answer:

c. The researcher had crossed two heterozygous plants.

Explanation:

Due to technical problems, you will find the complete explanation in the attached files.

Which of the following findings would lead you to determine that an infant's airway is open

Answers

Answer:

blowing air into his/her mouth and checking for an increase in the thoracic region........I GUESS

a phlebotomy technician has collected a neonatal screening card. which of the following actions should the technician take to properly dry the blood stop collection card?

Answers

Answer:

place the card on a flat dry surface

ba kiểu truyền tín hiệu của tế baò

Answers

Repost it in English please

WRITE THE DEFINITIONS OF EACH ANIMAL ORGANELLE LISTED. (1) nucleolus (2) nucleus (3) ribosome (4) vesicle (5) rough endoplasmic reticulum (6) Golgi apparatus (7) cytoskeleton (8) smooth endoplasmic reticulum (9) mitochondria (10) vacuole (11) cytosol (12) lysosome (13) centriole

Answers

Answer: nucleolus: a small dense spherical structure in the nucleus of a cell during interphase. nucleus: the positively charged central core of an atom, consisting of protons and neutrons and containing nearly all its mass. ribosome: a minute particle consisting of RNA and associated proteins found in large numbers in the cytoplasm of living cells. They bind messenger RNA and transfer RNA to synthesize polypeptides and proteins. vesicle: a small fluid-filled bladder, sac, cyst, or vacuole within the body. rough endoplasmic: reticulum (RER), series of connected flattened sacs, part of a continuous membrane organelle within the cytoplasm of eukaryotic cells, that plays a central role in the synthesis of proteins. Golgi apparatus: a complex of vesicles and folded membranes within the cytoplasm of most eukaryotic cells, involved in secretion and intracellular transport.

Explanation:

Which food has the greatest amount of polyunsaturated fat?

Answers

there are multiple foods that do, some examples are:
walnuts
sunflower seeds
fish
There are multiple foods

Darwin’s finches evolved on an island. What is the main reason that islands often provide good examples of evolution?

Answers

Islands are isolated

Answer:

They allow for automatic biogeographic isolation. In rock layers, jellyfish fossils are found lower than trilobite fossils, and trilobite fossils are found lower than ammonite fossils.

Explanation:

(found it on quizlet feel free to rewrite in you own words)

Phân tích các yếu tố cho thấy ĐẤT là môi trường đa dạng nhất về các loại sinh vật?

Answers

.... what you wrote isn’t a question.... you wrote a statement.....

Here is what you wrote translated to English

Analysis of factors shows that SOIL is the most diverse environment in terms of organisms?

Answer:

I don't no answer sorry

Explanation:

follow

definition of human rights

Answers

Answer: a right that is believed to belong justifiably to every person.

Explanation:

Answer:

Human rights are standards that allow all people to live with dignity, freedom, equality, justice, and peace. Every person has these rights simply because they are human beings.

Explanation:

Human rights are rights inherent to all human beings, regardless of race, sex, nationality, ethnicity, language, religion, or any other status. Human rights include the right to life and liberty, freedom from slavery and torture, freedom of opinion and expression, the right to work and education, and many more.

What is the complimentary dna strand for TCTTAAATGATCGAT

Answers

Answer:

AGAATTTACTAGCTA

Explanation:

The DNA strand pairs are:

Adenine (A) -- Thymine (T)

Cytosine (C) -- Guanine (G)

and vice versa.

The given strand:

TCTTAAATGATCGAT

Based on the given pairs above, your answer will be:

AGAATTTACTAGCTA

~

Scientists have been studying the size of three populations in a river in Ireland. In this ecosystem, pike (a type of big fish), and perch eat snails. The data showed that all three populations were stable. Then the snail population increased suddenly. What will likely happen to the size of the perch population as a result? The size of the perch population will...

Options:

A. Stay the same. The size of it's consumer population did not change, so the number of deaths in the perch population did not change. There will be the same number of births and deaths in the perch population.

B. Decrease. The larger snail population will take more energy storage molecules from the ecosystem, leaving fewer available for the perch population. This will lead to more deaths than births in the perch population.

C. Increase. The larger snail population will provide more energy storage molecules for the perch population, so they will reproduce more. This will lead to more births than deaths in the perch population.

D. Increase. An increase in any population within an ecosystem will lead to an increase in the sizes of all other populations in the ecosystem.

Answers

Answer:

C. Increase. The larger snail population will provide more energy storage molecules for the perch population, so they will reproduce more. This will lead to more births than deaths in the perch population.

Explanation:

What does the symbiotic relationship commensalism mean? (Question is from GradPoint.)


A. One organism captures and eats another


B. One organism benefits and the other is not affected


C. One organism feeds off of another organism


D. Both organisms benefit

Answers

Answer:

B

Explanation:

Commensalism is a symbiotic relationship in which one species benefits while the other species is not affected.

Answer: B. One organism benefits and the other is not affected

How many kinds of mosquito are common in Nepal l​

Answers

there are 130 kinds of mosquito are common in Nepal l

Ari drew a diagram to show organisms in an ecosystem.

A flowchart. Cycle 1: 1, Grass. 2, Grasshopper. 3, Shrew or Mouse. 4, Fox. Cycle 2: 1, Grass. 2, Mouse. 3, Fox or Snake. Cycle 3: 1, Grass. 2, Rabbit. 3, Fox.

What did Ari draw?

a food chain
a trophic chain
a food web
an energy web

Answers

Answer: Ari draw a food web.

Explanation:

A single ecosystem which contains all the food chains is called a food web.

In a food web each living thing present in a food web is a part of multiple food chains. Hence, food webs tend to represent the overlapping of food chains in that ecosystem.

The flow chart drawn by Ari represents that the living things present in cycle 1 are part of cycle 2 and cycle 3. Also, living things present in cycle 2 are part of cycle 1 and cycle 3.

A food chain is basically a single path where each organism is dependent of the other as a source of food without any overlapping.

Thus, we can conclude that Ari draw a food web.

Answer:

c

Explanation:

what will most likely happen if a population is large and no migration, mutation, or environmental change occurs?
1. natural selection will increase
2. nonrandom mating will start to occur
3. the rate of evolution will increase
4. gene frequencies will remain constant

Answers

4. Gene frequencies will remain constant

I need help on this please and thank you!

Answers

Answer:

I think it's probably 2,3, and 4 :))

Answer:

renewable resources can be replenished.

most renewable resources are easily available in nature.

all renewable resources are cost effective.

Which of the following techniques employs a probe consisting of a labeled, single-stranded DNA of known sequence that can find and bind to a complementary sequence present in a large sample of different DNA sequences?

a. DNA hybridization
b. RFLP
c. PCR
d. DNA sequencing

Answers

Answer:

Explanation:

PCR

Which of the following is true
about true-breeding plants if they are allowed to self-pollinate?

A. They never have offspring with the same traits as the parent plant.

B. They have offspring with traits that are identical to the parent plant with one or two differences.

C. They always have offspring with traits identical to the parent plant.

Answers

Answer:

b

Explanation:

some are the same while others are different (traits)

The Earth and the moon are kept in orbit by gravity and mass. Please select the best answer from the choices provided T F

Answers

Answer:

True

Explanation:

the Earth and the Moon are kept in orbit by gravity and mass.

Answer:

True (T)

Explanation:

Yeah, the Earth and the moon are kept in orbit by gravity and mass. Hence, this statement is True (correct).

write paragraph about digestion of food in brief​

Answers

Answer:

Digestion is the breakdown of large insoluble food molecules into small water-soluble food molecules so that they can be absorbed into the watery blood plasma. In certain organisms, these smaller substances are absorbed through the small intestine into the blood stream.

Explanation:

according to wikipedia!

Digestion is nothing but breaking down of substances into simpler forms, which the body can use. We eat many things and they have very complex compounds, our body cannot use these compounds. So, different parts of our digestive system breaks down different compounds to simpler forms, so that our body can use it for different functions.

Describe sea turtle populations during the late 1400’s

Answers

Answer:

6.5 million sea turtles

Recent estimates show us that there are nearly 6.5 million sea turtles left in the wild with very different numbers for each species, e.g. population estimates for the critically endangered hawksbill turtle range from 83,000 to possibly only 57,000 individuals left worldwide.

Explanation:

hope it helps you

 

porfavor especifica que quieres que te diga

Explanation:

Select the correct answer.
How does the high specific heat of water help maintain the temperature of earth?
A By heating and cooling more slowly than land or air
B. By heating and cooling faster than land or air
с.
By heating faster but cooling more slowly than land or air

Answers

i’m pretty sure it is B

The high specific heat of water help maintain the temperature of the Earth by heating and cooling more slowly than land or air. Thus, the correct option is A.

What is the specific heat of water?

The specific heat of an object is the amount of heat which is required to increase or raise the temperature of unit mass of that particular substance through one degree celsius. Specific heat is represented by the symbol 'c'. Its unit in SI system is Joule /(kg °C) and in CGS is cal / (gm °C).

The high specific heat of water helps in regulating the rate at which air changes its temperature, which is why the temperature of the planet change between different seasons is gradual rather than sudden, especially the geographical locations near the ocean.

Therefore, the correct option is A.

Learn more about Specific heat here:

https://brainly.com/question/11297584

#SPJ2

What are altitudes? help pls

Answers

Answer:

Altitude is how high vertically something is by definition

1 : height above a certain level and especially above sea level. 2 : the perpendicular distance from the base of a geometric figure to the vertex or to the side parallel to the base.

Without replication, organisms could not successfully


move.

grow and reproduce.

feed.

make proteins.

Answers

Answer: grow and reproduce

Explanation:

When curare, a neuromuscular poison, is dropped onto an isolated muscle-nerve preparation in a laboratory, the muscle does not contract when the nerve is stimulated, even though neurotransmitter is released from the nerve cell. Why does this happen

Answers

Answer:

Explanation:

Whenever the nerve terminal's action potential depolarizes, calcium enters the cell through the channels. Calcium allows acetylcholine (ACh) to be released more easily.  These ACh molecules subsequently circulate into the synaptic cleft and attach to the motor end-plate of the nicotinic cholinergic receptors. Acetylcholine molecules connect to nicotine ion-channel receptors present on cell membrane the of muscle cells, enabling the ion channels to open. Calcium ions then enter the muscle cell, kicking off a series of events that eventually result in muscular contraction.

Curare is a kind of neuromuscular relaxant blocker that is non-depolarized in nature. Nondepolarizing muscle relaxants work as competitive agonists, binding to ACh receptors but failing to activate ion channels. As a result, they inhibit ACh from bonding, preventing the development of endplate potentials and inducing muscle paralysis.

Plants convert ________.

Answers

Answer:

sunlight into energy

Explanation:

14. What do the embryos of different vertebrate species have in common?​

Answers

Answer:

Similarities in embryos are evidence of common ancestry. All vertebrate embryos, for example, have gill slits and tails. Most vertebrates, except for fish, lose their gill slits by adulthood.

Explanation:

itz from gologolo lol I hope it helps uh

keep smiling #smilies

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