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aliya0001 [1]
3 years ago
7

When a sperm and egg cell combine, the new cell called a zygote contains:

Biology
1 answer:
diamong [38]3 years ago
5 0

Answer:

2, 23 pairs

Explanation:

it is honestly the only one that makes sense

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Which theory did Pasteur disprove by using boiled beef broth and a flask with S-shaped tubing?
Nadusha1986 [10]
Pasteur disproved the theory of <span>spontaneous generation, or the theory that living things can be formed from any non-living thing.</span>
3 0
4 years ago
The system that removes waste in the blood from the body
777dan777 [17]

Answer:

The system that removes waste in the blood from the body

Kidney

paired organs that clean the blood producing urine from waste

Excretory system

A group of different tissues that work Together perform a specific function

organ

A system specialized for bringing oxygen into an animal's body and removing carbon dioxide

respiratory system

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4 0
3 years ago
Certain refrigerants such as cfcs and hcfcs, when allowed to escape into the atmosphere, will
slega [8]

The answer is ; deplete the stratosphere ozone layer and allow harmful ultraviolet radiation from the sun to reach the earth.

CFCs and HCFCs decompose over years to release CL- radical. When these radicals reach the atmosphere, they react with ozone as shown in the equations below. They reduce the ozone to oxygen hence depleting the protective layer.

Cl(g) + 03(g) ---- ClO(g) + 02(g) (1)

ClO(g) + O(g) ---- Cl(g) + 02(g) (2)


6 0
4 years ago
Are humans a dead end host for streptococcus pneumonia? If yes please explain why. Thank you!
zlopas [31]

Answer:

No, because Pneumonia can be transferred from one person to another.

Explanation:

Because humans are the only natural host for S. pneumoniae, our data suggest that the CbpA-mediated recruitment of complement FH may contribute to host tropism of this pathogen. A person can spread the germs that cause pneumonia when he or she coughs and expels the bacterial or viral infections that caused the disease. The droplets containing the virus or bacteria can land on a common surface, such as a table, telephone, or computer. Anyone can get pneumococcal disease, it occurs more frequently in infants, young children, the elderly or in people with serious medical conditions such as chronic lung, heart or kidney disease. Others at risk include alcoholics, diabetics, people with weakened immune systems and those without a spleen.

Have the best day ever! :D

5 0
3 years ago
What are the ways to conserve soil ?
mezya [45]
You can conserve the amount of soil you have by simply being a good steward of it. this would consist of planting plants in a cycle so that the minerals and nutrients that one plant draws out of the soil, the other replaces.
4 0
3 years ago
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