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svlad2 [7]
3 years ago
12

Explain why mutation and natural selection make development of new flu vaccines necessary every year

Biology
1 answer:
stealth61 [152]3 years ago
5 0
As the disease encounters the vaccine it can pass on genes that the vaccine can not fight off. 
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Assess the effect of selective breeding on food crops.
fomenos
Selective breeding on food crops may create stronger, and more healthy crops. The idea is to find your best crops, and breed them with other crops sharing the traits you want. Selective breeding can make crops produce more matter that is edible, grow taller, grow shorter, etc.. W<span>eaker crops, or crops that have undesirable traits will slowly disappear, and eventually the gene pool will mostly have the selected crop</span>
6 0
4 years ago
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How could natural selection affect the songs that birds sing?
ASHA 777 [7]
Well considering birds follow humane rules, their selection and environment around them being thriving could effect their songs in a positive way. While a bird with a low selection of environmental stuff around them would effect their songs in a bad way giving off a more down manner.
6 0
4 years ago
This is the portion of the cell outside and close the nucleus.<br> a. cell wall<br> b. cytoplasm
kakasveta [241]

Answer:

Cytoplasm is the answer

Explanation:

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5 0
3 years ago
What is the number of atoms in 0.25 moles of cobalt?
motikmotik
Number of mole s of H
2
​
= 0.25 moles
number of molecules = moles * Avogadro’s Number
number of molecules = 0.25×(6.022×10
23
)
number of molecules = 1.505×10
23

single molecule of hydrogen contains two H-atoms. So,
number of atoms = 2×(1.505×10
23
) = 3.01×10
23
5 0
3 years ago
What gasses in the atmosphere are especially important to plants
Aloiza [94]

Carbon Dioxide (CO2) because it is essential to cellular processes that allow plants to thrive and generate oxygen that we can breathe. Nitrogen could also be an example of one gas that's important.

6 0
3 years ago
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