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saveliy_v [14]
3 years ago
5

Which of the statements best describes the process of crossing over during meiosis? Haploid daughter cells trade chromosomes in

pairs. Homologous chromosomes pair up and exchange segments of DNA. Chromosomes trade genes with other nearby chromosomes at random. Pairs of homologous chromosomes separate and move to opposite sides of the cell.
Biology
1 answer:
Maslowich3 years ago
5 0

Homologous chromosomes pair up and exchange segments of DNA.

Option A

<h3><u>Explanation:</u></h3>

Crossing over is an event of Prophase 1 of meiosis 1. It occurs in the zygotene phase of prophase 1. Here the homologous chromosome pairs get very close together and gets packed within protein coat. The enzymes randomly cut the DNA segments from both chromosomes at same loci and exchange them with each other. This results in the exchange of genes between the two chromosomes. This is how the variation comes to place between offsprings of the same individuals. The crossing over results to form X shaped intersections between homologous pair of chromosomes which is called as chaismata. This phase occurs in pachytene phase and is visible in diplotene phase when the protein coat dissolves.

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Question 23 (Mandatory) (1 point)
aalyn [17]

Answer:

The correct answer is - option b) lipids

Explanation:

Lipids are one of the nutrients that are necessary to the body of an individual organism as it plays role in different ways such as energy storage, cell signaling, component of the cell membrane and many more hat maintain homeostasis in organisms body.

These nutrients are made up of fatty acid and glycerol long chains so these are polymer of glycerol and fatty acid and called triglyceride which provides maximum energy in comparison to other nutrients in need.

Thus, the correct answer is - option B) lipids.

5 0
3 years ago
Complete the following analogy "skeletal is to support as immune is to??
amm1812
Protect. The immune system protects the body from diseases and harmful pathogens. The skeletal system keeps you upright and supports you with help from the muscles.
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Why does the Ocean appear to be blue?
Oliga [24]

I do believe the answer is B

6 0
3 years ago
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Outline three examples of cycles of inorganic nutrients. For each, outline the uses of the nutrients in living organisms, its me
Serggg [28]

The three examples of cycles of inorganic nutrients are Nitrogen, carbon and sulphur cycle.

Nitrogen is required to make amino acids and DNA in organisms. Carbon is the main component of glucose through which organism make energy, about 18 per-cent of the human body comprises carbon. Sulphur is an important constituent of some proteins, amino acids and enzyme cofactors.

Explanation:

The biogeochemical cycles like the nitrogen cycle are responsible for converting nitrogen into many chemical forms as nitrates, nitrites, ammonia. This process involves degrade decomposing animal and plant matter and naturally cleaning the environment also nitrites and nitrates become biofertilizers. The plants take nitrogen through their roots and in turn primary consumer in food chain ie. organisms consume the plant and eventually releases nitrogen as a waste material, dead and decaying body to the soil and cycle goes on.

In the carbon cycle the carbon is exchanged from the atmosphere to the organisms and then again to the environment. Plants perform photosynthesis by using carbon dioxide, primary consumer eats it and gets nutrition to perform cellular respiration, in turn, gets energy which gets dissipated and stored as biomass eventually in the course consumer die and replenish the soil with carbon. The Carbon emitted will keep cycling through air, water and soil.

The sulphur cycle involves the movement of sulphur between rocks, water and living beings and plants. Plants ( producers) absorb sulphur dissolved in water and animal consume these plants to replenish their sulphur requirement. And when organism die, sulphur enter the cycle again.

There will be a transfer of these inorganic nutrients to the trophic level in food chain.

3 0
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A division or part of
azamat
If I am not mistaken, the answer is branch. For example a branch of the military is the U.S Navy.
5 0
3 years ago
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