In animals, respiration takes place through cellular interaction using ..._

Explain why crossing-over gives us so much genetic variation (differences in organisms).

Zinaida [17]

Answer:

Crossing-over is the exchange of genetic material between homologous chromosomes. It results in new combinations of genes on each chromosome. When cells divide during meiosis, homologous chromosomes are randomly distributed to daughter cells, and different chromosomes segregate independently of each other.

Explanation:

please give me brain list and follow

5 0

3 years ago

Which system destroys and removes harmful organisms? A. Endocrine System B. Excretory System C. Lymphatic System D. Reproductive

kari74 [83]

B excretory system destroys

3 0

4 years ago

Draw and label the parts of the eye. State the function of any five parts of the eye.

Sidana [21]

Answer:

The labeled drawing is attached; I just grabbed an image off of the internet. You can do this by hand by just copying what's in your textbook or other reference materials. Let me define five main parts:

Retina. This is a thin layer of tissue on the back of the eye that receives the signals of light and transfers them to the brain so you can understand them as color and sight.
Cornea. This is the front part, a reflective layer that "refracts" light. What this means is that light doesn't go directly through it, but its path is almost deflected a little.
Sclera. This is the part that looks white from the front. It's a protein covering to your eye, and it's very close to the cornea.
Iris. This is the actually colored part of your eye. If you have hazel or blue eyes, the iris is that portion of the eye. It allows differing amounts of light in.
Pupil. This is the black part of the eye. It's a hole that looks black because of all the light coming through and being absorbed.

8 0

3 years ago

Place the following events of a reflex arc in the correct order: 1) motor neuron activation, 2) sensory neuron activation, 3) se

VikaD [51]

Answer:

The reflex arc follows this sequence of events

1. sensory receptor activation

2. sensory neuron activation

3.information processing

4. motor neuron activation

5. effector response

Explanation:

Reflex arc is the pathway of nerves during a reflex action. An example of a reflex arc is when we accidentally touch a hot object. First, the receptor in the skin detects a stimulus in this case the change in temperature. Second, the sensory neuron transmit the electrical impulses to the Central Nervous System for information processing. Then relay neurons connect sensory neurons to motor neurons. Third, motor neurons sends electrical impulses to an effector wherein the effector produces a response ( muscle contracts to move the hand away from the hot object. This happens in a split of seconds.

3 0

3 years ago

I have a 62% rn on my credit recovery and so i have to repet the year but if i get a good score on this quiz maybey ill get a 63

Anon25 [30]

Question 1 the answer is cats
2 is round worm

4 0

3 years ago

In animals, respiration takes place through cellular interaction using ...__ *