Answer:
B. Chromosomes are threadlike structures that carry genetic information
Explanation:
Normally developed humans carry about 46 chromosomes in each cell, so A is false.
The numver of chromosomes is equal from the mother and the father, so C is false.
Chromosomes are arranged in 23 distinct pairs, so D is false.
The statement that best describes chromosomes is: Chromosomes are the threadlike structures that carry the genetic information.
What is a chromosome?It is a structure that is present in both prokaryotes and eukaryotes and is composed of nucleic acid (DNA) and proteins. It is responsible for genetic information.
Facts about chromosomes:Humans have 46 chromosomes in all somatic cells, and the reproductive cells except in the sperm and ova, which are haploid with 23 chromosomes only. Humans receive one set of 23 chromosomes from their mother and the other set from their father.Chromosomes are arranged in 23 distinct pairs in the human body.Hence, option b) is the correct option.
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The surroundings where a particular species lives is known as its
Which of the following genetic abbreviations denotes a male human? help please
a) 23,XX. c) 23, XY
b) 46, XX d) 46, XY
Answer:
Answer is Option D - XY.
Explanation:
A typical human diploid cell contains 46 chromosomes, or 23 pairs: Two of the 46 are the sex chromosomes that determine an individual's sex: XX = female and XY = male.
Osmosis does not require an additional input of energy from the cell.
Osmosis is considered to be a type of
active transport
endocytosis
passive transport
exocytosis
Answer:
Osmosis is considered to be a type of
active transport.
Explanation:
Answer:
passive transport
Explanation:
Osmosis is the process in which water molecules move from a region of higher water potential to a region of lower potential down a water potential gradient across a partially permeable membrane, so little energy is required to carry out this process, thus it is a form or passive transport.
Osmosis, diffusion and facilitated diffusion are all examples of
1. Active transport
2. Passive transport
3. Photosynthesis
3. Asexual reproduction
Answer:
2. Passive Transport
Explanation:
In passive transport, molecules are going down their concentration gradient with no energy involved. In osmosis, water molecules move from a higher to lower concentration. In facilitated diffusion, molecules go from higher to a lower concentration through a transport protein.
In shorthorn cattle, when a red bull (RR) is crossed with a white cow (WW), all the offspring are roan—a spotted, red and white color. What offspring are expected from mating a roan bull and a roan cow?
Answer:
25% red
50% roan
25% white
Explanation:
When RR (red) is crossed with WW (white), it results in roan color.
RR (red) x WW (white)
RW (roan)
Two roan individuals are then mated.
RW x RW
RR RW RW WW
Offspring
1/4 RR - Red
1/2 RW - Roan
1/4 WW - White
Hence, the offspring are expected to be 25% red, 50% roan, and 25% white.
What is the source of the energy that
flows through most of the food chains on
Earth?
Answer:
the corret answer is the sun
Explanation:
The Sun is the major source of energy for organisms and the ecosystems of which they are a part. Producers such as plants, algae, and cyanobacteria use the energy from sunlight to make organic matter from carbon dioxide and water.
Are the following populations likely to be undergoing evolution? Read the description of the population and select yes or no from the drop-down menu. A laboratory population of beetles is kept under conditions ideally suited for that species. All the beetles' needs are met. The space is very large, but contained.
Yes or No
Answer: No
Explanation:
hope this helps !!
Answer:
The answer is NO,
the next answer is YES
Explanation:
I did it 0,0
Patients with a genetic condition known as cystic fibrosis struggle with symptoms such as lung and digestive problems. At the cellular level, the cells of patients with the disease do not transport water or other materials out of the cell efficiently. Therefore, patients’ cells have a build up of water and other substances inside the cell. Which of the following best describes how cystic fibrosis impacts cells?
Answer:
One pair of chromosomes includes a gene called the cystic fibrosis transmembrane conductance regulator (CFTR) gene. This gene is large and complex — in fact, more than 1,000 different CF-related mutations have been identified.
In most people, the CFTR gene helps regulate the flow of salt and fluid in and out of cells. But if there is a mutation in this gene, chloride, a component of salt, gets stuck inside the cells and a thick, sticky mucus starts to build up inside the body.
Explanation:
Which statement about DNA is NOT correct?
O DNA is found in the nucleus of eukaryotes
O DNA is single stranded
O Deoxyribose is the sugar in DNA
o there are two single ring nitrogen bases in DNA
Answer:
B (2nd Option): DNA is single-stranded
Explanation:
A is correct: DNA is indeed found in the nucleus of eukaryotes.
B is incorrect: Although there can be single strands of DNA (ssDNA), DNA is usually double-stranded which is how it forms its characteristic double-helix shape.
C is correct: Deoxyribose is indeed the sugar in DNA (Deoxyribonucleic Acid)
D is correct: The two single ringed nitrogenous bases in DNA are thymine and cytosine, while the other two (Adenine and Guanine are double ringed.
Hope this helped!
helpppp pleaseee im currently about to fail
Answer:
B
Explanation:
Answer:
the b is the ccowect answertjynhtgbfvd
Explanation:
Ethylene oxide is a highly flammable gas used to sterilize medical equipment. To prevent a fire hazard, ethylene oxide
should only be used in an area
O with open windows and doorways.
with non-flammable equipment only
O without fire extinguishers.
O without sparks or flames.
Answer:
without sparks or flames.
~+ lil more info +~
Ethylene oxide is a highly flammable gas used to sterilize medical equipment. To prevent a fire hazard, ethylene oxide should only be used in an area: without sparks or flames. ... To prevent a fire hazard, ethylene oxide should only be used in an area: without sparks or flames.
To prevent a fire hazard, ethylene oxide should only be used in an area without sparks or flames. Thus, the correct option for this question is D.
What is ethylene oxide?Ethylene oxide may be defined as a type of highly flammable gas that is significantly utilized in order to sterilize medical equipment. It is a colorless gas with a sweet odor.
It is used primarily to produce other chemicals, including antifreeze. In smaller amounts, ethylene oxide is used as a pesticide and a sterilizing agent.
As this ethylene oxide is a highly flammable gas one must be required to keep this in a place or an area that is free from sparks or any other kinds of flames.
Therefore, to prevent a fire hazard, ethylene oxide should only be used in an area without sparks or flames. Thus, the correct option for this question is D.
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hurry and answer l will give you the brainlest What is a stimuli? write 3-5
Answer:
something that stimulates your brain
Explanation:
I am to new to this to know how to explain (a stimuli could also be something that is like touching a hot coal
Which statement BEST explains the role of DNA in the growth and specialization of an organisms?
Question 2 options:
A.DNA stores genetic information
B.DNA directly controls your body.
C.DNA controls which proteins are produced in each cell for different functions.
D.DNA creates all the same proteins in each cell of the organism's body.
C.DNA controls which proteins are produced in each cell for different functions.
different genes can be activated or inactivated that's why even though the cells that line your stomach contain the gene for ACTH synthesis they don't synthesize it
Examine the diagram of a cell.
Which accurately labels the Golgi body?
W
X
Y
Z
Explanation:
the answer is letter x but I t may be wrong because I think its the red one but its not an option
isabella works for an environmental safety group. her group wants to answer the question “to what lengths must we go to protect plants and animals?” why is her groups research question flawed?
Answer:
In this case, the question asked is "To what lengths must we go to protect plants and animals?", which is not specific and cannot be used for scientific research.
The ecological researches for the safety of the environment involves the protection of the plants and the animals on the basis of their number and vulnerability to extinction. Almost all the length of the plants are ecologically important and can decrease in number due to the changes in the environment, the length is not a parameter to determine the protection boundary.
Myosin is plentiful in muscle cells, but is not found at all in lens cells. Lens cells contain large amounts of crystallins, which are not found in muscle cells. Why do some proteins appear in one type of cell but not in another?
In order for two new cells to be created during mitosis, each cell must receive an identical copy of DNA. In order to accomplish this task efficiently prior to mitosis, a cell will condense DNA into
Answer:
chromosomes
Explanation:
A cell must condense DNA into chromosomes before it can divide mitotically to form two new cells with identical copies of DNA.
The condensation of the DNA happens at the initial phase of the mitosis - the prophase - during which the DNA thickens and condenses to form chromosomes.
These chromosomes then align at the cell's plate during metaphase and they become separated into sister chromatids through the pulling of the spindle fiber at anaphase. Separated chromatids of the same chromosome are then transported to the opposite ends of the cell where they decondense before cytokinesis takes place.
What are 2 ways carbon can get from the ocean to the lithosphere?
[And i would appreciate some short simplified answers just to make its easier for myself]
helppp please , I’ll give brainliest
Answer:
b~~~~~~~~~~~~~~~~~~
A model of a biological process is shown. What is the purpose of this process?
In the given model, the process of translation is described. It is done to translate the genetic code into a particular sequence of amino acids.
What is translation?It is the process in molecular biology, in which ribosomes in the cytoplasm or endoplasmic reticulum produces proteins post the process of transcription of DNA to RNA.
It is the process of converting the sequence of a molecule of messenger RNA to the amino acids sequence at the time of the synthesis of protein. The genetic code illustrates the association between the sequence of base pairs in a gene and the sequence of corresponding amino acid, which it encodes.
Thus, the correct statement is the last one, that is, to translate the genetic code into a particular amino acid sequence.
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What happens after RNA is produced?
1. A protein is assembled by
attaching amino acids together, based on the RNA codons.
2. The RNA strand is converted back into DNA so the cell is ready for the next cell division.
3. The cell divides creating the sex cells (egg or sperm) for reproduction.
Answer:
It should be 1 if I am right
Explanation:
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does aerobic and anaerobic respiration have the same number of carbons, hydrogens and oxygens? Explain.
The fundamental difference between aerobic and anaerobic respiration is the usage of oxygen in the process of cellular respiration. Aerobic respiration, as the name suggests, is the process of producing the energy required by cells using oxygen. The by-product of this process produces carbon dioxide along with ATP – the energy currency of the cells. Anaerobic respiration is similar to aerobic respiration.
What is kinetic energy and how is kinetic energy related to the temperature of a substance?
Answer:
Kinetic energy is a property of a moving object or particle and depends not only on its motion but also on its mass. The temperature of gases is proportional to the average translational kinetic energy of atoms and molecules. The motion of individual molecules in a gas is random in magnitude and direction.
Which of the following is not a greenhouse gas?
A. Carbon Dioxide
B. Methane
C. Water Vapor
D. Nitrogen
Answer:A
Explanation:
Gus drew a diagram to compare marsupial and placental mammals. Which label belongs in the area marked Y? have a two-week gestation period young develop inside body sometimes lay eggs are endotherms
Answer:
i believe the answer is B, young develops inside body
Explanation:
both placental and marsupial mammals give birth to live animals
Answer:
A) have a two-week gestation period
Explanation:
This was right on edge nuity
I hope this helps
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Where and how do the high concentration H+ ions get out of the thylakoid?
Answer: here's what I could find on it:
- Energy travels through the electron transport chain, which pumps hydrogen ions into the thylakoid space.
- The concentration of H+ ions is higher inside the thylakoid than it is outside. the ions flow through the channel by diffusion.
Explanation: sorry if that's not what you need.
The hydrogen ions are allowed to pass through the thylakoid membrane of the chloroplast through an embedded protein complex called the ATP synthase.
What is the ATP synthase?ATP synthase is a protein complex which is made up of various enzymes which catalyzes the formation of the energy storage molecules such as ATP (Adenosine triphosphate) using ADP (adenosine diphosphate) and Pi (inorganic phosphate). It is classified under the ligase class of enzyme as it changes ADP molecule by the formation of P-O bonds.
ATP synthase requires energy to form energy storing molecules such as ATP, from adenosine diphosphate (ADP) and inorganic phosphate (Pi). Because of this, ATP synthesis is coupled with the cellular respiration of the mitochondria and electrochemical gradient which is created by the difference in proton (H⁺) concentration across the mitochondrial membrane during the electron transport through the electron transport chain (ETC). In plants, proton gradient is formed in the chloroplast, in the thylakoid lumen and through the thylakoid membrane.
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Explain what ATP is and how energy is stored/released by this molecule.
Need help now please
The ATP molecule can store energy in the form of a high energy phosphate bond joining the terminal phosphate group to the rest of the molecule. In this form, energy can be stored at one location, then moved from one part of the cell to another, where it can be released to drive other biochemical reactions.
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Answer:the answer would be the 4th one
Explanation:
What would most likely happen to plant cells if the plant was watered with salty water?
Answer: it will wilt and will eventually die.
Explanation:
