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adell [148]
3 years ago
7

The caplike structure on a sperm cell that helps aid egg penetration is called the

Biology
1 answer:
madreJ [45]3 years ago
7 0
I think it's called the Acrosome
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Bacillus cereus is naturally found in the soil. B. cereus is known to contaminate rice, which, if undercooked and ingested, can
Helen [10]

Answer:

soil; rice

Explanation:

Bacillus cereus is naturally found in the soil. B. cereus is known to contaminate rice, which, if undercooked and ingested, can lead to gastroenteritis. In this example, the reservoir for B. cereus is the soil, and the source of infection is the rice.

A reservoir refers to the breeding ground or natural habitat of micro living organisms such as bacterias, fungi, worms, etc. Thus, a reservoir hosts or harbours pathogens and usually serves as a source of infection to other living organisms.

On the other hand, a source of infection refers to a contaminated material from which a disease can be acquired by another living organism.

5 0
3 years ago
Under certain circumstances, potassium ions ( K + ) in a cell will move across the cell membrane from the inside to the outside.
dexar [7]

Answer:

8.18 × 10 ⁻²¹.

Explanation:

The potential energy may be defined as the energy stored in the rest objects. This energy is important for the maintenance of the concentration gradient in the cell.

The change in the potential energy can be calculated as follows:

W = v2-v1 × q.

Here, the charge of the proton is considered because k+ ions has been used.

W= 0 - ( - 70. 5 mV) × 1.602 * 10^-19 C.

W= 8.18 × 10 ⁻²¹J.

Thus, the answer is 8.18 × 10 ⁻²¹.

5 0
3 years ago
Which option is it? Please help
Nat2105 [25]

Answer:

The correct anwser is D. Signals inside the spinal cord

Explanation:

hope this helps :)

7 0
2 years ago
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Bacteria and archaea differ in (1 point)
Step2247 [10]
<span>Apart from their habitats, Bacteria and Archaea differ in cell wall structure and membrane lipid composition. All bacteria have peptidoglycans in the cell wall whereas the archaea do not. Both also are different in RNA polymerases and thus in their protein synthesis. </span>
5 0
3 years ago
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2. Chemicals that absorb light<br> are called
Bumek [7]

Answer:

Chemicals that absorb light are called Pigments. 3. Chlorophyll makes plants look green because it Reflects green light.

Explanation:

7 0
3 years ago
Read 2 more answers
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