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allsm [11]
1 year ago
14

Can someone pls check my answers?? All 5 questions are attached, I got some right but some wrong

Biology
1 answer:
worty [1.4K]1 year ago
6 0

The position of the Earth in the solar system and more regional effects, such as carbon dioxide levels, all play a role in the causes of ice ages. Thus, option A is correct.

<h3>What are factor that involve in ice age on earth?</h3>

When the orbital cycle turns back, these feedbacks—involving the spread of ice and the emission of greenhouse gases—work in reverse to warm the Earth once more.

A prolonged period of cooling of the Earth's surface and atmosphere is known as an ice age, which is marked by the development or presence of polar and continental ice sheets as well as alpine glaciers.

Flooding has increased along the U.S. coastline as a result of the warming, rising, and acidifying of the seas.

Therefore, The Earth is currently facing an ice age.

Learn more about ice age here:

brainly.com/question/12916542

#SPJ1

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Crossing over occurs when
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Correct answer:
"<span>B- homologous chromosomes join together to form tetrads during prophase I"

</span>It is during prophase I that homologous chromosomes join together (<span>synapsis)</span> and form tetrads - four chromatids are together in the new structure of two chromosomes - and this is the reason why crossing-over occurs in this phase. It is in this tetrad that both arms of both chromosomes may crossover and matching regions exchange places. This process results in homologous chromosomes recombination leading to genetic variability. 
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2 years ago
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Of the total amount of glucose energy consumed by the body each day, about what percentage is used by the brain and nerve cells?
Alexeev081 [22]

Of the total amount of glucose energy consumed by the body each day, about 20% is used by the brain and nerve cells.

The brain constitutes about 2% of the total body but it is one of the main consumers of energy derived from glucose.

The energy provided by glucose is used for the proper functioning of the brain. It generates ATP which is an energy source that is responsible for r neuronal and non-neuronal cellular maintenance and generates neurotransmitters.

Thus glucose-derived energy is critical for the health of the brain. Lack of energy can cause several brain diseases.

If you need to learn more about glucose energy, click here

brainly.com/question/11653058?referrer=searchResults

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4 0
1 year ago
Why is it not always helpful to represent the natural world with models?
kifflom [539]
B. A model cannot show real life conditions. This is so because models aren't alive.
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4.010<br> Mutations can be caused by<br> a. radiation<br> b. chemicals<br> C. both a and b
Ugo [173]

Answer:

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if my answer helps you than mark me as brainliest.

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