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2 years ago

Any three ways by which harmful subtances could contaiminate bod

1 answer:

4 0

Through a cut or an injury where any skin has been broken.

An infection through an animal's bite or sting.(Like the West Nile Virus which spreads though mosquito bite, or Rabies though an infected mammal's bite).

Can be inhaled or consumed and go from the lungs into the other organs causing harm internally.

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This is the structure in the cell nucleus that houses a cell's genetic information. Example: Humans have 46 of these.

MArishka [77]

The structure that is in the cell's nucleus that contains the genetic information if it is condensed and becomes wrapped and folded with many histone and other proteins, it is called chromosomes.

Humans do have 46 chromosomes, 44 autosomal ones and 2 sex chromosomes.

4 0

3 years ago

Read 2 more answers

The_

lyudmila [28]

Answer:

Mass

Explanation:

The larger a star's mass, the shorter it's lifespan.

I hope this helps! ☺

5 0

3 years ago

The highlighted structure separates the oocyte from the externally located ________. zona pellucida primary follicle corona radi

Naya [18.7K]

Answer:

Granulosa cells

Explanation:

Foliculogenesis is a dynamic and complex process through which the follicle goes through many stages of development in a short period (approximately 60 days in humans and some chimpanzees).

The stages classification is based on morphological changes such as follicular size or diameter, the number of follicular cell layers, etcetera. These classifications might vary among authors but could be denominated as:

Primordial follicle

Primary follicle

Secondary follicle and

De Graaf follicles (This is the one shown in the image)

Through each stage, there are certain modifications in the oocyte, follicular cells, and connective tissue. As the oocyte grows, the follicular cells might reach a size twice or three times bigger than the ones of the primordial follicles. Their shape also changes and they adopt an aspect of stratified epithelium. Their cytoplasm gets a granulous aspect, after what these cells receive the name of granulous cells. The De Graaf follicle characterizes for having a space named follicular antro that displaces the oocyte to one of the sides.

The oocyte at this point gets surrounded by zona pellucida and corona radiata .

The follicular antro (The highlighted structure) separates the oocyte from the externally located granulosa cells or follicular cells.

7 0

2 years ago

The three broad classes of neurons are:

Harman [31]

Sensory, interneuron, motor

8 0

2 years ago

Which of these types of weathering requires the presence of water?

serg [7]

Answer:

A. Abrasion

Explanation:

"In abrasion, one rock bumps against another rock. Gravity causes abrasion as a rock tumbles down a mountainside or cliff. Moving water causes abrasion as particles in the water collide and bump against one another."

-Lumen Learning

8 0

3 years ago