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alina1380 [7]
3 years ago
9

Which structure is at work when the body deals with reflex actions?

Biology
2 answers:
bixtya [17]3 years ago
7 0
The spinal cord is at work
Karo-lina-s [1.5K]3 years ago
7 0

Answer:

The correct answer is spinal cord.

Explanation:

A reflex action is an instantaneous response movement caused due to stimulus. This is an involuntary action which is controlled by the neurons of the spinal cord through a pathway called reflex arc.  

This reflex arc starts when excited receptors send signals in the form of impulse through sensory neurons. This impulse travels to the dorsal roots of the spinal cord via afferent neuron or sensory neuron where interneuron or association neuron send the signals via motor neurons to muscle cells which respond.

Thus, the spinal cord is the correct answer.

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Glucose-6-phosphate dehydrogenase deficiency (G6PD) is inherited as an X-linked recessive gene 43) in humans. A woman whose fath
LiRa [457]

Answer:

50% or 1/2. The result remains unchanged if the husband were to have G6PD.

Explanation:

For X-linked recessive inheritance, a female (XX) needs two recessive alleles to be affected while a male needs only one (XY). It is hypothetically assumed that the Y chromosome does not carry any trait.

Assuming the allele for the disease is represented by g, a woman whose father suffered from G6PD is a carrier for the disease with genotype X^GX^g. A normal man will have the genotype X^GY. When the 2 marries:

X^GX^g   x   X^GY = X^GX^G (normal female), X^GY (normal male), X^GX^g (carrier female), X^gY (affected male)It thus means that 50% or 1/2 of their sons will be expected to have G6PD.

Now, assuming the husband has G6PD, the mating becomes:

X^GX^g   x   X^gY = X^GX^g (carrier female), X^GY (normal male),  X^gX^g (affected female), X^gY (affected male)50% or 1/2 of their sons is still expected to have G6PD. The ratio remains unchanged.

3 0
3 years ago
Which microscope were cells first observed?
lutik1710 [3]

Answer:

Leeuwenhoek made his own microscope lenses, and he was so good at it that his microscope was more powerful than other microscopes of his day. In fact, Leeuwenhoek's microscope was almost as strong as modern light microscopes.

Explanation:

Hope this helps you

8 0
2 years ago
Read 2 more answers
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Morgarella [4.7K]
A. using new technology to provide additional supporting data.
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3 years ago
Please help me with this question. at least 7 sentences. don’t copy and paste from google.
Darya [45]

<u>Answer:</u>

Fossils are the sources to learn the changes on the earth and how much it changed in these years. Its provides us with information about the existence of plant and animals in the past.

Actually, the fossils we found till the date are the ancestors of the plants and animals that live today.  Moreover, some fossils of animals are easily identifiable since they exist till the date.  

But there are fossils of animals that exist no longer in the earth. By studying and analyzing the fossils, one can tell how life on the earth has changed.

Also, we can learn about the ancestors of the plants and animals and how their long life existed on earth.

In other words, one can learn where and how those organisms were lived. So that we can know about our ancient environments.

6 0
3 years ago
Which of the following is an example of a biotic limiting factor in an ecosystem?
Svetach [21]

Answer:

New predators move into the ecosystem

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A limiting factor is anything that constrains a population size and slows or stops it from growing,so when predators move into the ecosystem they compete with other organisms for resources

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