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il63 [147K]
3 years ago
11

The origin and evolution of viruses is controversial. Discuss whether you think viruses evolved before the first cell or whether

they have
coevolved and are perhaps still coevolving with their hosts.
Biology
1 answer:
Illusion [34]3 years ago
5 0

Answer:

sorry i don't know the answer

Explanation:

answer ka hrit no aw sorry

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The blastocoel and blastopore are both found in the blastula stage of development.
Andreyy89

Answer:

False

Explanation:

Cleavage in zygote forms a hollow ball of cells known as a blastula. The blastocoel refers to the fluid-filled cavity present in the blastula stage of early embryonic development.

Blastula undergoes gastrulation during which some of the cells exhibit inward movement and form a sac. The blastopore refers to the opening of this sac present in the gastrula stage of embryonic development.

Blastopore of gastrula develops into the mouth in protostomes and becomes anus in deuterostomes.

6 0
3 years ago
Penicillin is Choose one: A. produced by a mold and was discovered accidentally. B. a human-designed antibiotic, synthesized to
NeX [460]

Answer:

Option-A

Explanation:

Penicillin is an antibiotic drug that is derived from the fungal species of Penicillium molds especially the<em> Penicillium notatum</em>.  The penicillin acts by disrupting the formation of the cell wall and thus prevents the growth of the bacteria.

The discovery of penicillin was accidental when he was studying the petridish of staphylococcus and he found that due to avoidance while the experiment, molds grew in the petridish.  The area around the mold was clear and clear rings without the bacteria were easily observed. This lead to the discovery of the penicillin compound.

Thus, Option-A is the correct answer.

4 0
3 years ago
What is a win one for Jesus by dividing it in half if you got your nails
Bumek [7]
What on earth, please repeat the question clearer
4 0
3 years ago
Given the amount of work required to move a box 5 meters across the floor is 100J. What is the force that is needed?
bogdanovich [222]

work \: done \:  =  \: force  \times distance
Work done = 100J
Distance = 5 meters
Force = ?
force =  \frac{work \: done}{distance}
Force = 100/5 = 20N
Therefore, the force needed is 20 Newtons
6 0
3 years ago
Which of the following best describes a DNA molecule
brilliants [131]

Answer:

A. double helix.

Explanation:

5 0
2 years ago
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