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SVEN [57.7K]
3 years ago
7

Why does it take longer for teen brain to wind down?

Biology
1 answer:
Alexeev081 [22]3 years ago
6 0

Answer:

Teenager's circadian rhythms – the cycle of sleep and wakefulness – typically begin two hours after adults. Neuroscientists say they are biologically predisposed to go to sleep around midnight and not feel fully awake and engaged until between 9am and 10am

Explanation:

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When an organism dies, carbon dioxide can still be transported out of its nerve cells, but calcium
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Answer:Oxygen availability is often a limiting factor for cell survival, and it is generally ... An organism is faced with the following problem: How can the composition of ISF be ... which ensures proper exchange of oxygen and carbon dioxide; the kidney, ... to carry out its function of bringing blood close to cells so that the exchange of ...

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3 years ago
How much is 300000 *​
yawa3891 [41]

Answer:

300,000

Explanation:

It is 30% of a million and quite a bit of money that can be used to buy a house.

3 0
4 years ago
What is the goal of selective breeding? combine traits from two different species choose the most desirable traits to keep breed
lions [1.4K]
The purpose of selective breeding<span> is to develop livestock whose desirable traits have strong heritable components and can therefore be propagated.</span>
4 0
3 years ago
Read 2 more answers
Turtles and leopards all have four limbs and an amnion. True The common ancestor of lamprey and lancelets had a vertebral column
kramer

Answer:

Explanation:

The objective is to conclude if the statements are true or false based on facts.

1)\text{ Turtles and leopards all have four limbs and an amnion.  } True

2) \text{The common ancestor of lamprey and lancelets had a vertebral column. } False

This is because their ancestor is a Chordate who doesn't have a vertebral column but a notochord.

3) True

\text{Frogs are the sister taxa of turtles and leopards because they are more }

\text{related to a common ancestor.}

4) \text{Leopards and bass are more closely related than turtles and bass}  False

This is because the bass is a fish that possess some characteristics traits related to an amphibian (turtle) as compared to a mammal(leopard).

5) \text{The taxon that shares the most recent common ancestor with frogs is the bass.} False

The taxa of turtles share a more common ancestor with frogs compared to bass.

6) \text{Leopards and lancelets have no common ancestor. } False

The common distant ancestor for leopards and lancelets is known as  Chordates

4 0
3 years ago
a biologist originally marked 40 butterflies in Wilson Park. Over a month-long period butterfly traps caught 200 butterflies. of
oee [108]
Given merely 40 butterflies were marked, assumed that there were multiple captures of both marked and unmarked butterflies, that the butterflies caught in traps were on the loose to be caught again. There are two mathematical solutions for this, both yielding the same answer which is 100. 

• First, to each marked butterfly was taken twice (40 marked X2 = 80 captured) then of the unmarked butterflies the 120 captured must relate to 60 actual butterflies. In which 40 + 60 = 100. 

• Secondly, by means of ratios in which 80/200 = 40/X. In this case X also = 100 that will result to the estimated size of the population of wilson park is 100.
7 0
4 years ago
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