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3 years ago

In a positive-feedback system where hormone a alters the amount of protein x,

1 answer:

ozzi3 years ago

6 0

An increase in A produces and increase in X

This is a positive feed back mechanism. This mechanism enhance or amplify changes. This tends to alter the balance away from equilibrium because one hormone will increase the release of the other hormone. An example of this is the child birth. During labor, oxytocin is released to increase the uterine contraction the release of oxytoocin will be induced by the contractions of uterus. This will go on until the child was born. Just remember positive feedback enhance the original stimulus.

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Savanna ecosystems are tropical grasslands with warm temperatures year-round and are characterized by grasses, small and tall tr

777dan777 [17]

Answer:

Savanna, is a biome, dominated by grasses. It exhibit dry climatic conditions. This biome receives very little rain fall. The tree population is scanty in this biome. The Savanna biome is found in Australia, Africa, South America and India. The giraffe is an animal that feeds upon leaves, fruits and pods of tall Savanna trees. The giraffe is tall enough to reach the highest branches of the trees.

As, in the given situation, more giraffe feed upon the leaves of the trees closest to the ground until all the leaves or vegetation of the ground and closest to the ground cleans up. Members of the population which have taller neck will be able to thrive leaves growing at the top of the tree canopy. This feature is called as natural selection. This involves the survival of the individuals, which have traits suitable for changing environment. The giraffe which have comparatively long neck will have better advantage for survival than the others in situations of scarcity of food.

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4 years ago

Which of these is the main difference between aerobic respiration and anaerobic respiration?

QveST [7]

B
aerobic uses oxygen

4 0

4 years ago

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Which of the following genotypes could be described as homozygous dominant

ipn [44]

Answer:

Homozygous dominant genotype means both the alleles ( alternative form of a gene) are same. ... AA shows that both the alleles are same and are dominant

Explanation:

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4 years ago

_______________ produce proteins by following coded instructions that come from the nucleus of the cell.

horsena [70]

D) ribosomes

ribosomes produce proteins following codes instructions sent from the nucleus.

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3 years ago

Large sheets of ice can cause erosion by moving the rocks beneath them. How can the rocks be weathered by ice?

Afina-wow [57]

Question:

Large sheets of ice can cause erosion by moving the rocks beneath them. How can the rocks be weathered by ice?

Answer:

$D.$ $Water$ $gets$ $into$ $the$ $cracks$ $and$ $expands$ $as$ $it$ $freezes.$

D. Water gets into the cracks and expands as it freezes.

Explanation:

When water freezes, it expands. The ice then works as a wedge. It slowly widens the cracks and splits the rock. When ice melts, liquid water performs the act of erosion by carrying away the tiny rock fragments lost in the split.

Learn more:

The process is called freeze-thaw. 1st, liquid water gets into small holes or cracks in the rock (such as by rain or seawater splashing into them). 2nd, when the temperature drops this water will freeze into solid ice because ice occupies more room than water this state change puts pressure and tension on the surrounding rocks. 3rd, when the temperature increases again the ice will melt back into the water. It is this pressure increase and release that causes the rock to weather.

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3 years ago

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