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vovangra [49]
3 years ago
13

How many hours of sleep do you really need?

Biology
1 answer:
otez555 [7]3 years ago
3 0
According to the National Heart, Lung, and Blood Institute, adults need around seven to eight hours. For teenagers they recommend nine to ten, and at least ten for children.
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Discuss the relationship between food webs and trophic levels.
Damm [24]
The tropic level is each level of hierarchy in an ecosystem and the primary source of energy left over after an animal is consumed from the lowest level up. a food web is a system of inner locking interdependent food chains.
Hope it helped
8 0
3 years ago
PLEASE HELP ME!!!!!!!!!!!!!!!!!!!!!
Nutka1998 [239]

Answer:

I think it's D. Runoff

7 0
3 years ago
1. Based on the model, which of the pairs of
julsineya [31]
Banana and lemon that’s the answer
7 0
3 years ago
Which of the following is not important in determining the distribution of organisms in aquatic biomes? A. light penetration B.
Vlada [557]

Answer: Option C) water

Explanation:

The factors affecting the distribution of organisms in aquatic biomes include:

- Light penetration: Plants life is limited to the upper layers of the ocean where light cab penetrate and be used to produce food. Thus, very few organisms are found in the ocean deep.

- Waves: the movement of surface water of the oceans, and it's direction affect the placement of organisms as they must have strong anchor or body parts suited for buoyancy

- salinity: not all organisms can survive in water with high salt content. Thus, some live in salty water, and others in fresh water or the mixture.

- Mineral content: the levels of hydrogen ion could make a water bidy alkaline or acidic thus affecting organism that can survive in it

Thus, since water ordinarilly is Universal, it is not an important factor in determining distribution of organisms in aquatic biomes

5 0
2 years ago
Read 2 more answers
Non-photosynthetic species of Euglena are sometimes classified as which of the following?
IRISSAK [1]

Options are not provided in the question. The complete question is as following:

Non-photosynthetic species of Euglena are sometimes classified as which of the following?

a. zooflagellates

b. sarcodines

c. water molds

d. pyrrophytes

Answer:

a. zooflagellates

Explanation:

Zooflagellates are non-photosynthetic flagellates which lack cell walls or plastids. The mode of their feeding is by phagocytosis or endocytosis.

Non-photosynthetic species of Euglena are consider as Zooflagellates. Zoomastigophora is a phylum within the kingdom Protista. some of the diseases caused by zooflagellates  includes African Sleeping Sickness. they have a spherical, elongated body with a single central nucleus and form a symbiotic relationship with other organisms.

Hence, the correct option is a.

5 0
2 years ago
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