What is the main difference between a cell nucleus and a nucleoid?

2 answers:

8 0

D. presence or absence of a surrounding membraneAS, Nucleus is a membrane bound organelle whereas Nucleolus has no limiting membrane.

QveST [7]3 years ago

5 0

D. presence or absence of a surrounding membrane

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Name a organism that does most of the Earth’s nitrogen fixation for the nitrogen cycle

zmey [24]

Carbon fixation only takes place in autotrophs. For example plants, algae, and some bacteria, or organisms that make their own food.

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3 years ago

What is the relationship between DNA, chromosomes, genes, alleles, dominant, recessive, and trait?

larisa86 [58]

Chromosomes are made of condensed coils of DNA. Genes are segments on a chromosome that carry the code for a specific trait. Alleles are contrasting forms of a gene. Dominant means that a particular trait will be visible. Recessive means that a trait will be hidden (unless it is paired with another recessive gene). A trait is how the gene is seen. For example, eye color is a trait.

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3 years ago

Write one scientific question about the organism in the photo of a baby chimpanzee

zepelin [54]

Idk exactly what you mean but I guess you can ask what kind of cell it has idk?

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3 years ago

In California, a species of salamanders were geographically separated over time. The group that lived in southern California rel

alex41 [277]

Answer:

It ocurred a selection by allopatric speciation

Explanation:

The allopatric speciation refers to the evolution in which the same specie starts developing different characteristics because of geographic barrers and this characteristics after some time generates two different specie.

It happens because usually according to the environment or the predators, species have to develop different adaptations so they can survive. In this case we have two different types of camouflage adaptations made by the salamanders acording to the conditions so for one specie it is better to camouflage from the predator mean while to the other is better to use lived colors to seem as it is a poisonous animal and in this way avoid the predators.

So you can see the same specie develop different strategies to survive because of a geographic separation, generating an allopatric speciation.

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2 years ago

true or false? to make a person breathe in, the volume of the chest cavity must decrease, creating a higher pressure in the thor

faltersainse [42]

The thorax is a very vital and important organ in the human body.

It is a structure that serves as a protective covering for organs in the body such as the lungs, the heart, some vital blood vessels e.t.c

It is false that to make a person breathe in, the volume of the chest cavity must decrease, creating a higher pressure in the thorax.

When a person breathes in, the chest cavity expands (the volume increases) and the pressure in the thorax decreases.

When a person breathes out, the chest cavity decreases in size, and the pressure in the thorax increases.

Therefore, we can see that the process of breathing in humans, follows the principle of Boyle's Law.

Boyle's law states that as the volume increases there is a decrease in pressure and as the volume decrease there is an increase in pressure.

Therefore, It is false that to make a person breathe in, the volume of the chest cavity must decrease, creating a higher pressure in the thorax.

To learn more, visit the link below:

brainly.com/question/24359876

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2 years ago