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3 years ago

The diffusion of water across a selectively permeable membrane is called

Biology

2 answers:

elixir [45]3 years ago

7 0

It's called osmosis.

AveGali [126]3 years ago

4 0

Diffusion is passive transport, no ATP is used. This process involving water is called osmosis, water moves from a higher concentration to a lower concentration
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Chromosomes are in pairs, what else comes in pairs

Leviafan [203]

Answer:

Humans have 23 pairs of chromosomes--22 pairs of numbered chromosomes, called autosomes, and one pair of sex chromosomes, X and Y. Each parent contributes one chromosome to each pair so that offspring get half of their chromosomes from their mother and half from their father.

Explanation:

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3 years ago

tall heterozygous pea plants were crossed and the resulting seeds grown. Out of 360 plants, 270 were tall and 90 dwarf. What des

lozanna [386]

Answer:

This question lacks options, the options are:

A. All 270 tall plants were heterozygous

B. All 270 tall plants were homzygous.

C. Only 90 plants were homzygous.

D. All dwarf plants were homzygous.

The answer is D.

Explanation:

This question involves a single gene coding for height in pea plants. The allele for tallness (T) is dominant over that of dwarfness (t). This means that a dwarf plant can only be homzygous recessive (tt) while a tall plant can either be homzygous (TT) or heterozygous (Tt).

According to the question, two tall heterozygous pea plants were crossed i.e. Tt × Tt. Based on this cross, a phenotypic ratio of 3:1 is expected, which is in accordance with the 270 tall plants and 90 dwarf plants (360 total) that was obtained in the cross. Since dwarfism in pea plants is a recessive trait, this means that all the dwarf plants produced in this cross (90) were homzygous (tt).

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3 years ago

Does mitosis or meiosis occur more frequently in your body? Explain your answer

vodomira [7]

Answer:

Mitosis

Explanation:

Meiosis is the splitting of sex cells which happens during reproduction. Mitosis is the splitting of body cells in order to make more body cells. Mitosis is how your body grows, therefore it occurs more frequently because the body is not constantly reproducing.

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Which of the light micrographs shows epithelial tissue that forms thyroid gland and secretes hormones?

ruslelena [56]

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The epithelial cells tend to be cubical in form after they are inactive, however additional columnar after they are actively secreting hormones.
The epithelial cells accumulate iodine from the blood and use this component within the synthesis of thyroglobulin, an oversized compound protein that forms the mixture.

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3 years ago

What is the cell cycle

Irina-Kira [14]

The cell cycle or cell-division cycle is the series of events that take place in a cell leading to its division and duplication of its DNA (DNA replication) to produce two daughter cells.

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3 years ago

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