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erastova [34]
4 years ago
9

From the origins of the human species some 3 million years ago until about the year 1800, most people in the world lived in whic

h type of societies
Biology
1 answer:
Kryger [21]4 years ago
8 0
Industrial
agrarian
hunting and gathering
horticultural and pastoral 

GOOD LUCK!!

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1. True or False: Water vapor is only visible on really cold days where the air temperature is below freezing.
Aleonysh [2.5K]

Answer:

The correct answer is - False.

Explanation:

Water vapor is water in its gaseous state. Water vapor is totally invisible, an individual can not see water vapor in any situation with naked eyes. Fog, clouds, mist are not the water vapor as they contain liquid water or droplets.

Water vapor is essential for the weather and climate, without water vapor there would be no rain, snow or clouds as require water vapor to form.

Thus, the correct answer is - false.

8 0
3 years ago
Define gray matter in the spinal cord. It is neural tissue that is dominated by the cell bodies of neurons, neuroglia, and unmye
IceJOKER [234]

Answer:

It is neural tissue that is dominated by the cell bodies of neurons, neuroglia, and unmyelinated axons, and surrounds the narrow central canal.

Explanation:

Grey matter is a part of the central nervous system that is found on the surface of the brain.

It is a neural tissues that has alot of cell bodies of neurons, neuroglia and contain more unmyelinated axons and surronds the narrow central canal.it is distinguished from white matter because it has alot of cell bodies and unmyelinated axons and also it is not as white as white matter with greyish color.

Grey matter form spinal tracts which are the pathways where signals are sent from the brain to all part of the body.

5 0
3 years ago
How does the basic structure of a steroid differ from other macromolecules such as carbohydrates?
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The basic structure of a steroid differ from other macromolecules such as carbohydrates by having a four ring structure whereas a carbohydrate do not have. A steroid is a group of organic substances which has four rings that are arranged in a certain configuration. Examples are testosterone, estradiol and lipid cholesterol. It will always have seventeen carbon atoms in its structure. Carbohydrates, on the other hand, are a group of organic substances that consist carbon, hydrogen and oxygen atoms typically in a 2:1 ratio of the hydrogen and oxygen atoms. So, it would have an empirical formula of Cx(H2O)y.
3 0
4 years ago
Ting submissions until Wednesday, October 23, 2019 at 2:50 pm
Mama L [17]

Answer:

<u>vacuole</u>

Explanation:

Vacuoles are filled with cell sap which contains sugar, salts and waste products and enclosed by tonoplast, a membrane. They mostly act as a store for sugars and salts, they maintain the shape of the cell and play a role in osmoregulation. They are found in both plant and animal cells.

7 0
4 years ago
What does a food chain due ?
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Shows the flow of food and energy

4 0
3 years ago
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