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Makovka662 [10]
2 years ago
14

How are molecules transported across cell membrane against the concentration gradient?.

Biology
1 answer:
Masja [62]2 years ago
8 0

Answer: "To move substances against a concentration or electrochemical gradient, a cell must use energy. Active transport mechanisms do just this, expending energy (often in the form of ATP) to maintain the right concentrations of ions and molecules in living cells."

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Which of the following is NOT characteristic of adolescence?
LuckyWell [14K]

B. Formal operational stage of cognitive development

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An average number of eggs a bird lays is based on natural selection. If a bird lays too many eggs, there a high chance that she
mr_godi [17]

The correct answer is stabilizing selection.

Stabilizing selection is a kind of natural selection in which the mean of the population steadies on a specific non-extreme trait value. This is considered to be the most general process of action for natural selection as the majority of the traits do not seem to vary radically with time.

Stabilizing selection is the reverse of disruptive selection. In spite of preferring individuals with extreme phenotypes, it favors the transitional variants. Stabilizing selection seems to eradicate the more extreme phenotypes, resulting in the reproductive success of the average or norm phenotypes.

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3 years ago
Illegal fishing is thought to account for what percent of fish caught?
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How would the extra chromosome affect the male offspring produced by the gamete?.
monitta

An extra chromosome will produce an aneuploidy. It may have severe consequences on the resulting zygote.

<h3>Aneuploidies and chromosome abnormalities</h3>

The term 'chromosome abnormalities' refers to different types of problems that occur in meiosis which are associated with the disjunction of chromosomes.

The most common chromosomal abnormality is called aneuploidy, which means an abnormal number of chromosomes.

Aneuploidy is caused by the presence of an extra or due to the lack (missing) of a chromosome during meiosis.

For example, a trisomy is an aneuploidy due to the presence of an extra chromosome (three copies of the same chromosome instead of two).

Learn more about aneuploidy here:

brainly.com/question/2130641

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