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Zina [86]
4 years ago
11

Which reason best explains why dead specimens must be used with transmission electron microscopes?

Biology
1 answer:
coldgirl [10]4 years ago
4 0
<span>The specimen are placed in vacuum while examining the cells or living organisms. Also, the electron must penetrate inside of the cell and in such conditions, any living organism is not able to survive. Thus, this reason best explains the answer to why dead cells specimen must be used for Transmission electron microscopy.</span>
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Which of the following statements is FALSE?
Delvig [45]

Answer:

c. Damage to the primary (somatic) motor cortex results in the loss of both voluntary muscle control and all reflexive contractions.

Explanation:

The primary motor cortex is an area in the brain that is responsible for the control and regulation of activities that involves movement of the body as well as the postures they body takes which we also refer to as motor skills.

The primary motor cortex sends signals in the form of nerve impulses to the brain and this in turn helps in the maintenance of the motor skills that is carried out by the body.

Not only does the damage to the primary (somatic) motor cortex results in the loss of both voluntary muscle control and all reflexive contractions, it also causes other losses such as constant contraction of the muscles also know as spasticity, involuntary muscle contraction also referred to as clonus.

5 0
4 years ago
(b)
mamaluj [8]

Explanation:

You didn't attach a picture so i'll just explain how to find the number of stomatas/mm^2.

first you find the surface by multiplying the length by the width

0.1*0.1=0.01mm^2

now you count the numer of stomatas in the picture

in0.01mm^2 you have.........................x stomatas

in 1mm you have ...............................y stomatas

y=100x

6 0
3 years ago
Raccoons and lesser pandas have many corresponding sequences of nucleotides.
Oksanka [162]

Analyzing the proteins of the Racoons and lesser pandas, there will be huge similarities with minor modifications.

These species will be very closely related.

<h3><u>Explanation:</u></h3>

The evolutionary background of the species are mainly studied based on the similarities of the nucleotide sequences and proteins. While studying the Lesser pandas and Racoons, there was a huge similarities in then based on their structures, and on their protein composition. The nucleotide sequences also showed huge similarities which also points that they have developed from same ancestor. This is why they are very closely related with each other by means of evolution.

5 0
3 years ago
The four-field system allows for question 46 options:
finlep [7]
B
less field space will be wasted
8 0
4 years ago
How the sweat glands are affected by the parasympathetic nervous system?
andriy [413]

Answer:

Sweating is under the control of the sympathetic nervous system, which orchestrates the body's reaction to stressful situations and emergencies. The sympathetic nervous system activates the sweat glands through the chemical messenger acetylcholine.

4 0
4 years ago
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