When an ecosystem has a scarce nutrient, that is when there is a nutrient limitation.

So the answer is C. <span>Nitrogen is typically the limiting nutrient in freshwater environments.

This is because Nitrogen is the "scarce" nutrient </span>

6 0

2 years ago

Cross a mother who carries the hemophilia gene but does not express it, With a father with hemophilia

alisha [4.7K]

Answer: The cross will produce 4 offsprings with the following genotypes:

XhXh, XhX, XhY and XY.

Explanation: Hemophilia is an X-linked disease. A woman who carries the hemophilia gene but doesn't not express it is heterozygous, therefore she has a genotype of XhX, and a man who has hemophilia has a genotype of XhY. A cross between them will produce one female and one male who are hemophilic (XhXh and XhY), one female who is a carrier (XhX) and one normal male.

See the punnett square attached for the cross

3 0

2 years ago

Action potentials in the heart spread from cell to cell through

Leni [432]

Answer:

Gap junctions within the intercalated disks

Explanation: Gap junctions within the intercalated disks allow impulses to be propagated from one cardiac muscle cell to another. It allows sodium, potassium, and calcium ions to flow between adjacent cells, propagating the action potential, and ensuring coordinated contractions.

8 0

2 years ago

In aristotle's system of classification, animals were classified on the basis of their size and structure. please select the bes

Alexus [3.1K]

Where is the choices?

4 0

2 years ago