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3 years ago

What is spontaneous generation?

Biology

1 answer:

kkurt [141]3 years ago

4 0

Answer:

Spontaneous generation, the hypothetical process by which living organisms develop from nonliving matter.

Explanation:

In 1668, Francesco Redi, an Italian scientist, designed a scientific experiment to test the spontaneous creation of maggots by placing fresh meat in each of two different jars. One jar was left open; the other was covered with a cloth. Days later, the open jar contained maggots, whereas the covered jar contained no maggots. He did note that maggots were found on the exterior surface of the cloth that covered the jar. Redi successfully demonstrated that the maggots came from fly eggs and thereby helped to disprove spontaneous generation.

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The arterioles (small arteries) leading to an organ, constrict in order to decrease flow to the organ. To shut down an organ, bl

Elodia [21]

Answer:

The main factor that causes vasoconstriction is the high concentration calcium inside muscle cells.

Explanation:

When the vessels suffer vasoconstriction, the blood supply is decreased and in this way the heat of the body is maintained. The way this happens is because the blood can no longer reach the surface and therefore decreases outward heat radiation. The main factor that causes vasoconstriction is the high concentration calcium inside muscle cells. There are several factors that cause vasoconstriction, internal or external. Environment is one of the external factors, and what happens to the penguins' feet is an example for it, since they are trying to preserve body heat to survive.

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3 years ago

What are the anatomical features of the stomach that support digestion

labwork [276]

Answer:

rugae or gastric folds

Explanation:

not totally sure but i think so

4 0

2 years ago

Where in water is being converted into a gaseous form?

DiKsa [7]

Answer:

evaporation

Explanation:

all the others have a completely different meaning

hope it helps, pls mark me as brainliest

7 0

3 years ago

How does the body’s response to endocrine regulation differ from its response to nervous regulation?

Mamont248 [21]

Answer:

Explanation:

Endocrine system uses chemical signaling (slow)

Nervous system uses electrical signaling (fasr)

4 0

3 years ago

Glucose-6-phosphate dehydrogenase deficiency (G6PD) is inherited as an X-linked recessive allele in humans. A woman whose father

prohojiy [21]

Answer:

(a) 1/2; (b) no

Explanation:

Glucose-6-phosphate dehydrogenase deficiency (G6PD) is an X-linked recessive disorder and the woman's father was diseased so it means that woman is a carrier of the allele but has normal phenotype. It means that she will have XXᵇ genotype.

In contrast to this, her husband is diseased so his genotype will be XᵇY.

The Punnett square diagram related to the cross is attached.

(a) Proportion of their sons expected to be G6PD is 1/2:

They both may give birth to 4 progeny with genotypes XXᵇ, XᵇXᵇ, XY and XᵇY. It means they both may have 2 sons out of which one with genotype XᵇY will be diseased while the one with genotype XY will be healthy. So the proportion of their sons having G6PD is 1/2 or 50%.

(b) If the husband were G6PD deficient, the answer will not change.

The reason behind this is that this disease is caused by an allele located in X chromosome. But father contributes only Y chromosome to his son not X chromosome. The X chromosome will affect the genotype of his daughter not son that is why answer will not change. It means they will still have 1/2 of their sons diseased.

7 0

3 years ago