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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.
You might be interested in
Which hypothesis suggests that ancestral vertebrates may have evolved from urochordate larvae?.
Anastaziya [24]

Garstang's Auricularia hypothesis suggests that ancestral vertebrates may have evolved from urochordate larvae.

What is Garstang's Auricularia?

The auricularia hypothesis, proposed by Garstang was an attempt to explain how the chordate body plan originated from a deuterostome common ancestor by emphasizing the significance of changes in larval forms. According to the Garstang Hypothesis, development of sexual maturity in a non-metamorphosing lineage of tunicates might provide the immediate proto-chordate ancestors of more typical chordates.

Learn more about Garstang's Auricularia here:

brainly.com/question/29576544

#SPJ4

7 0
1 year ago
_____ proposes that the shortest number of steps or character state changes is most likely correct.
maxonik [38]
I think the awnser is D hope that helps 
6 0
3 years ago
Read 2 more answers
Which are segments of dna that code for spicific traits ?
lozanna [386]
Answer is C hope it helps
8 0
3 years ago
When 10,000 molecules of ATP are hydrolyzed to ADP and i in a test tube, about half as much heat is liberated as when a cell hyd
Korolek [52]

Answer:

C. Reactant and product concentrations in the test tube are different from those in the cell.

Explanation:

Cells convert some of the energy from ATP hydrolysis in to different forms of energy other than heat. ATP energy does not always generate more heat.  Many times, energy is used for different purposes.

4 0
3 years ago
Read 2 more answers
Question 23 (6 points)
Stels [109]

Answer: 1. Sea urchins and sea otters

2. They are prey for carnivores.

3. Sea otters, star fish

Explanation:

Sea urchins and sea otters are carnivores as they eat on the flesh of starfish and sea urchins respectively.

Starfish feed on the kelp forests which are the producers in the food chain and the starfish is the primary consumer and prey for sea urchins.  So, starfish and kelp forests are the prey in the marine ecosystem.

Keystone species is the one which controls the population of other inferior species in an ecosystem. Here, sea otters consume sea urchins so the population of sea urchins remained in control Starfish controls the population of kelp forest.

 

8 0
3 years ago
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