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Neporo4naja [7]
3 years ago
14

Pls help me guys! Pls answer both questions!!!! Thanks :D

Biology
1 answer:
zhannawk [14.2K]3 years ago
4 0
A and B i think am not sure
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3 years ago
Crossing over occurs when
Svet_ta [14]
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. 
3 0
3 years ago
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PLZ HELP
Paraphin [41]

Answer:

homeostasis is in yourr endocrine system. its if your blood suger is too low or high. if its too high your cells will absorb glucose. if its too low, your cells will release glucose.

Explanation:

hope this helps luv! good luck!

7 0
3 years ago
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A cross country runner runs 8 km in 2 minutes. What is his speed?
oee [108]

The speed of the cross country runner is equal to 4 km/min.

<u>Given the following data:</u>

  • Distance = 8 km.
  • Time = 2 minutes.

To determine the speed of the cross country runner:

Speed can be defined as the distance covered by an individual per unit time and it can be measured in kilometer per minutes (km/min).

Mathematically, speed is given by the formula;

Speed = \frac{distance}{time}

Substituting the given parameters into the formula, we have;

Speed = \frac{8}{2}

Speed = 4 km/min.

Read more: brainly.com/question/13102821

5 0
2 years ago
Mycobacteria secrete a waxy coating that makes this disease difficult to treat using antibiotics:
vlada-n [284]

Answer: the answer is tuberculosis

Explanation:

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