Meiosis is a process in which the number of chromosomes per cell is cut in half through the separation of homologous chromosomes in a diploid cell. Meiosis usually involves two distinct divisions called meiosis I and meiosis II. By the end of meiosis, a single diploid cell has produced four haploid cells.

After interphase I, the cell begins to divide, and the chromosomes pair up. In prophase 1 of meiosis, each replicated chromosome pairs with its corresponding homologous chromosome. This pairing forms a structure called a tetrad, which contains four chromatids. As the chromosomes pair, they sometimes undergo a process called crossing-over.

Which is a true statement of crossing-over?

A. Homologous chromosomes move to opposite ends of dividing cells

B. During crossing-over, bits and pieces of the homologous chromosomes are exchanged

C. The DNA of the diploid cell is copied

D. Crossing over decreases genetic diversity​

Answer:

A. DNA is transcribed into RNA, which is translated into protein

Explanation:

The process that accurately explains the process of gene expression is: DNA is transcribed into RNA, which is translated into protein. The correct option is A.

Gene expression is the procedure by which genetic information is utilized in the biosynthetic pathways of a functional gene product.

This aids in allowing it to produce end products such as protein or non-coding RNA as well as, as a result, affect a phenotype.

Several factors affect gene expression, along with molecules inside the cell, mutations that cause dominant negative effects.

It also cause haploinsufficiency, signaling molecules from neighboring cells and the surrounding environment, and epistasis. Several molecules within the cell influence gene expression.

The following process accurately describes gene expression: DNA is transcribed into RNA, which is then translated into protein.

Thus, the correct option is A.

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Answer:

Explanation:

sorry

Answer:

B

Explanation:

Because the turtles are testudines.

The answer to the question is A

Answer: An adapation

Explanation:

Answer:

Explanation:lol I n

Answer:

the new maps will have mountain like ridges and ravines. in the future scientists will find new animals and plants as they go deeper into the sea

Answer:

A base.

Explanation:

base+acid=neutral

Answer:

D

Explanation:

The first step in DNA replication is to 'unzip' the double helix structure of the DNA molecule. This is carried out by an enzyme, called helicase which breaks the hydrogen bonds? holding the complementary bases of DNA together

DNA replication is the biological process of producing two identical replicas of DNA from one original DNA molecule. The option (D) is correct.

DNA replication is the process by which a double-stranded DNA molecule is copied to produce two identical DNA molecules. Replication is an essential process because, whenever a cell divides, the two new daughter cells must contain the same genetic information, or DNA, as the parent cell.

Moreover, DNA must replicate (copy) itself so that each resulting cell after mitosis and cell division has the same DNA as the parent cell. All these cells, the parent cell and the two new daughter cells, are genetically identical.

Therefore, DNA replication is the process of creating two identical daughter strands of DNA. DNA replication occurs in the nucleus in eukaryotic cells and in the nucleoid region in prokaryotic cells. DNA replication occurs in S phase during the cell cycle prior to cell division.

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Answer:

i believe it's C

Explanation:

Answer:

The orange box

Explanation:

It is the most reasonable for the plant base orginism

Answer:

21%

I hope this helps!

Answer: anaphase

Explanation: Nondisjunction can occur during anaphase of mitosis, meiosis I, or meiosis II. During anaphase, sister chromatids (or homologous chromosomes for meiosis I), will separate and move to opposite poles of the cell, pulled by microtubules

Hope this helps :)

Answer:

RNA: Thymine, DNA: Deoxyribose

Explanation:

Hope this helps:)

Answer:

Ways in which people positively affect ecosystems around the world include: Recycling. Establishing wildlife preserves and parks. Creating green, open space laws.

Explanation:

:D

Answer:

It receives information from several cells.

Explanation:

The main advantage of cells having multiple dendrites and/or axons is that it receives information from several cells as compared to those cells which have one dendrite and receive information from only one cell. If neurons have hundreds or thousands of dendrites, so these dendrites allow the cell to receive information from thousands of other cells. So we can say that dendrites number plays a key role in nervous tissue.

Answer:

In humans we go through Lactic Acid Fermination

Explanation:

It is important because after glycolysis we have the elctron carrier NAD+ reduced to NADH and we cant continue glycolysis until we have NADH back to NAD+ so all lactic acid fermintation does it removed the electron and allow glycolysis to continue. It should be noted that fermintation occurs when there is no oxygen / not enough to continue cellular respiration so we rely on glycolysis to produce very little ATP while oxygen is replenished,

Answer:

Cellular respiration uses energy in glucose to make ATP. Aerobic (“oxygen-using”) respiration occurs in three stages: glycolysis, the Krebs cycle, and electron transport. In glycolysis, glucose is split into two molecules of pyruvate. ... Life first evolved in the absence of oxygen, and glycolysis does not require oxygen.

Explanation:

Got it from Goog|e >.<

Answer:

Plants

Explanation:

biotic means living

Plants are the only living thing out of the answer choices

Answer:

F1 is the result of two cross-pollinated parent plants.

Explanation:

So basically, when you cross two true breeding parent plants, then the offspring is known as the F1 generation i believe.

Answer:

[tex]\boxed {\boxed {\sf B. \ A \ population \ of \ wolves \ was \ introduced \ to \ Yellowstone \ National \ Park }}[/tex]

Explanation:

Let's evaluate each choice. Remember we are looking for an event to decrease the genetic variation and population.

A. Yellowstone expanded its borders

B. A population of wolves was introduced

B seems like a good answer, but let's check the others.

C. The amount of disease in the deer population decreased.

D. More grass and shrubs were planted in Yellowstone

The best answer choice is B: A population of wolves was introduced into Yellowstone National Park

Answer:

answer B is correct I just took the test!

Answer: D

Explanation: The ones who are doing this on Gizmos the answer is D.

“Because the bacteria in the control were almost 100% alive, we know that any deaths of bacteria in the other samples was because of the antibiotics.” Y’all should like my answer n give me the brain answer.

The results tell us that in the experiment the death of the bacteria in the other samples was because of the antibiotics, confirming that the bacteria from the farms are sensitive to antibiotics.

If a bacterium undergoes the action of an antibiotic, it is said to be sensitive; if, on the contrary, the antibiotic has no effect on the bacterium, it is said to be resistant. Resistance can be natural or acquired (eg, by plasmid transfer or mutations).

With this information, we can conclude that the results tell us that in the experiment the death of the bacteria in the other samples was because of the antibiotics, confirming that the bacteria from the farms are sensitive to antibiotics.

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Answer:

The oldest rock layer is letter E and the youngest is letter A

Explanation:

Soil piles on top of each other as time goes on via weather

Answer:

no

Explanation:

in the punnet square, your results would be 4 dd. 100% chance of a dwarf sized plant

Answer:

mRNA

Explanation:

mRNA

Answer:

Awwww sorry I don’t know the answer

Explanation:

Proteins are to ribosomes as lipids are to smooth endoplasmic reticulum. Details about functions of organelles can be found below.

Organelles are specialized structures in the cells of living organisms that perform specific functions in the cell.

Examples of organelles are as follows:

However, ribosomes are involved in the synthesis of proteins while the smooth endoplasmic reticulum are directly involved in the synthesis of lipids.

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