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zvonat [6]
3 years ago
13

The exchange of genetic materials between homologous chromosomes is called

Biology
1 answer:
Dima020 [189]3 years ago
8 0
The answer is A.

The tight pairing of the homologous chromosomes is called synapsis. In synapsis, the genes on the chromatids of the homologous chromosomes are precisely aligned with each other.
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One adaption to life in flowing water is what?
Alla [95]

Answer:

Explanation:

There are many options, here are a few choices:

Fast moving water tends to be colder than slow water; some of it originates as snow melt on the sides of mountains, for example. For this, animals in fast water tend to be more cold resistant. This is why you do not see fish like freshwater trout in equatorial regions. These animals struggle and die in slow, warm water.

Fast moving water means that if the animal or plant wants to stay put, it must resist the flow. Fish tend to be far more muscular and lean in these places, while insects like stoneflies, mayflies, and other larvae have ways to secure themselves to rocks and plants while growing. Plants develop strong root systems, and algae hold fast in rocky crevices in the river. Some animals also have suction in order to stay in place where there is fast flowing water.

Some animals have to adapt their reproductive systems as well. Because finding a mate is difficult in the sweeping waters, breeding tends to happen all at one time. As an example, salmon have runs, where thousands of fish all swim upriver at once to breed, can dramatically alter the surrounding ecology of the river. Insects like mayflies have hatches, where hundreds of thousands of flies swarm into the air at once to breed and lay eggs.

5 0
3 years ago
Explain the difference between the first day of spring (vernal equinox) and the first day of summer (summer solstice).
Sliva [168]

Answer: Vernal equinox(about March 21): day and night of equal length, marking the start of spring. Summer solstice (June 20 or 21): longest day of the year, marking the start of summer.

vernal = spring

solstice = summer

8 0
3 years ago
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Due to the coronavirus pandemic, more scientists have taken to testing the effectiveness of different masks. Recently, conflicti
Kay [80]

Answer:

The answer to your question is <u>All of the above</u>

Explanation:

Science is observable, testable, and flexible. This is shown when doing an experiment. First you observe something, test, then record. When new information or evidence comes in, Science is flexible enough to allow changes to the topic's existing evidence or add on to it.

3 0
3 years ago
Rajesh designed an experiment to test the effect of fertilizer on plant growth. The table on the right shows the data he collect
Hoochie [10]

Answer:

the answer will be

measure the growth of plant that did not recieve fertilizer

perform additional trials

Explanation:

i just took the test and got the answer right

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3 years ago
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What is it called when a molecule uses energy to move across a semipermeable membrane?
Morgarella [4.7K]
When molecules uses energy for transportation across the cell, then it is known as "Active Transport"

So, option B is your answer.

Hope this helps!
8 0
3 years ago
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