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Anettt [7]
2 years ago
13

Only about ______ of water is fresh and suitable for human use.

Biology
1 answer:
Anastaziya [24]2 years ago
5 0
<span>Only about 75% of water is fresh and suitable for human use.

Hope I helped ^_^

Please hit dat "THANKS" button!</span>
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Color in McIver beetles is determined by two alleles at one gene locus. McIver beetles must have a heterzygous genotype (genotyp
seraphim [82]

Answer: The frequency of brown beetles is 0.32.

Explanation: The frequency of A1 allele is 0.8. As p+q=1, or the sum of dominant and recessive frequencies equals 1 or 100%:

1 - 0.8 = 0.2

In Hardy-Weinberg principle,

p^{2} + 2pq + q^{2} = 1

2pq represents the frequency of heterozygote individuals, so:

genotype A1A2 = 2*0.8*0.2 = 0.32.

Thus, the frequency of brown beetles (A1A2) in the population is 0.32.

3 0
3 years ago
Discuss the work of famous ecologists and their contributions to environmental science. How does this knowledge of the environme
lakkis [162]
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8 0
2 years ago
If a cells nucleus has 55% adenine bases, how many cytosine bases will be present?
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If a cell’s nucleus has 55% adenine bases it also has 55% thymine bases, so the percentage of cytosine bases is 45% as same as  guanine bases.

This is known as Chargaff's rule which states that DNA should have a 1:1 ratio of pyrimidine and purine bases (the amount of guanine should be equal to cytosine and the same thing with adenine and thymine).

DNA molecule globally has percentage base pair equality: %A = %T and %G = %C.

8 0
2 years ago
Nitrogenous base+sugar+phosphate group=
storchak [24]
Nucleotides is the answer: they have a phosphate group, a deoxyribose sugar, and a nitrogenous base.
8 0
3 years ago
Which is a good example of property of water called surface tension ?
olya-2409 [2.1K]
Answer:

Don’t quote me, but A.

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There is a bug, called a Water Strider, that use surface tension to ‘walk on water.’
4 0
2 years ago
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