Which of these BEST describes our current understanding about how species evolve over time?

Biology

1 answer:

storchak [24]3 years ago

4 0

Answer:

Populations evolve as natural selection results in a change in the frequency of alleles within the population over time.

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For fertilization to occur in humans, only one sperm is needed to weaken the barrier that surrounds the egg.

photoshop1234 [79]

Answer:

False

Explanation:

Approximately 200 out of 200 million sperms ejaculated during intercourse reach the general vicinity of the egg. They sperms must undergo capacitation during which dilute inhibitory factors fluids of the female reproductive tract weaken the membrane of the sperm head so that head of the sperm can be broken easily when it came in contact with the egg.

The first sperm to reach an egg isn’t the one to fertilize it because the egg is surrounded by a gelatinous membrane called the zona pellucida. Outside this layer, a layer of small granulosa cells also present.

Therefore, it requires numerous sperm to clear a path through these barriers before one of them can penetrate the egg and fertilize it.

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Both human activity and natural forces contribute to the levels of carbon dioxide in the atmosphere. Which of the following cont

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Plato fam the answer is C. Using fossil fuels for energy add me on Instagram haleyjenkins423

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3 years ago

What percentage of the moon as seen from Earth is illuminated during the third quarter phase?

Alex73 [517]

Answer:

50% of the moon is illuminated during a third quarter phase

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With the knowledge of the nucleotide sequence of a gene, which one of the following could you determine with the most accuracy?

Lubov Fominskaja [6]

<u>Primary structure of the protein </u>can be determined With the knowledge of the nucleotide sequence of a gene.

Strings of amino acids make up proteins, and strings of nucleotides make up nucleic acids.
A water molecule is removed during a biological process that links the carboxyl group of one amino acid to the amino group of a nearby amino acid to generate peptide bonds.
The main structure of a protein is thought to be its linear amino acid sequence.
A codon is a cluster of three mRNA nucleotides that codes for a particular amino acid.
Each mRNA produces a protein that has a specific amino acid sequence corresponding to it. The start and stop of translation are indicated by two codons known as start and stop codons.

learn more about nucleotide here: brainly.com/question/16099437

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1 year ago

Humans are negatively affecting the carbon cycle by

Kruka [31]

Answer:

All of these are correct

Explanation:

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