The granular material visible within the nucleus is called

1 answer:

7 0

The correct answer is chromatin. Chromatin is the granular material visible within the nucleus of a cell. It contains coiled DNA and other simple proteins called histones inside it. If you look at a cell through using a light microscope you can see the chromatin within the nucleus. The purpose of the chromatin is to hold and protect the DNA.

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Vaselesa [24]

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autotrophe supply food for the hetertrophe

Explanation:

give brainliest please I need it to level up

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3 years ago

"The ____ is the division of the autonomic nervous system that coordinates arousal and involves the expenditure of energy."

finlep [7]

Answer:

Sympathetic nervous system

Explanation:

The sympathetic nervous system is the part of the autonomic system of neurons which gets activated in the condition of stress.

The stress conditions activate the sympathetic nervous system which prepares the human body for the stress condition by either fight or flight mode.

The fight or flight responses requires a large amount of energy which are produced by the activation of the parasympathetic energy therefore the sympathetic system involves the expenditure of the energy. The system is also involved in sexual arousal.

Thus, the Sympathetic nervous system is the correct answer.

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3 years ago

Caves are formed by the actions of acid rain plant roots river water groundwater

Karolina [17]

Solution caves are formed in carbonate and sulfate rocks such as limestone, dolomite, marble, and gypsum by the action of slowly moving ground water that dissolves the rock to form tunnels.

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3 years ago

Read 2 more answers

Natural selection and genetic drift are two mechanisms of evolution that can lead to speciation. Define both natural selection a

timofeeve [1]

<h2>Evolution </h2>

Explanation:

Genetic drift

Genetic drift is change in allele frequencies in a population from generation to generation that occurs due to chance events
The genetic drift occurs due to random fluctuation of any allele in a gene pool and is more efficient in small population
The founder effect and the bottleneck effect are cases in which a small population is formed from a larger population which means they may experience strong drift for generations
In founder effect a genotype from a homogeneous gene pool migrate to a newer habitat and colonize there and form a newer community which leads to the genetic drift to the original population, speciation which occurs in this effect is the peripatric speciation
In bottleneck effect the elimination of inferior genotype from a homogeneous gene pool occurs due to the strong selection pressure and changing environmental conditions which leads to genetic drift and a only a few most adapted genotype survives and flourish

Natural Selection

Natural selection is a selection pressure which operates in a population and allow the best fitted genotype to survive in changing environmental conditions and eliminate the other genotype which are not fit
Genetic drift, mutation and sexual selection are important causes of natural selection
Directional natural selection favours the superior genotype and eliminate the inferior and intermediate genotype, in the history of evolution the most common natural selection is directional natural selection
Stabilizing natural selection favours the intermediate genotype but eliminates the extreme genotype
Bidirectional natural selection favours the extreme genotypes but eliminate the intermediate genotypes

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3 years ago

Why would precipitation be scarce during a drought?

Sati [7]

It would be scarce during a drought because in order for precipitation to take place evaporation must first occur. If there is to water to be evaporated then precipitation won’t take place

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3 years ago