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Otrada [13]
2 years ago
5

Some leaves turn orange, red, or yellow before they drop. What is present in them that makes them so colorful

Biology
1 answer:
Lapatulllka [165]2 years ago
8 0
Leaves get their colors through pigments. Leaves turn green because of chlorophyll but when they turn orange red and yellow it’s the chlorophyll breaking down and mixing with pigments (like carotenoids)
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DNA content in a cell is measured in picograms (pg) (what ever that is) . A sea star has 17/20 pg of DNA a scallop cell has 19/2
Kobotan [32]
This is not Biology, it's math. You have too do what you did on the other problems which is convert them all too decimals using a calculator. Make sure too write them down and them just find which number is more or less.


7 0
3 years ago
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What type of signal is long-lasting and works at night? A) olfactory
Elena-2011 [213]

Option A is correct. Your olfactory nerve is the first cranial nerve (CN I). It's also section of your autonomic apprehensive system, which regulates physique functions. This nerve enables your feel of smell.

<h3>What are olfactory signals?</h3>

Listen to pronunciation.  A sequence of occasions in which cells in the nose bind to scent-bearing molecules and send electrical indicators to the talent where they are perceived as smells.

<h3>What is an example of olfactory?</h3>

The excellent smell of spring flowers, for example, may be considered an "olfactory delight." A associated word, olfaction, is a noun referring to the experience of scent or the act or procedure of smelling.

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3 0
1 year ago
A population of white moths lives in a forest near a factory. this factory burns coal and pollutes the air with black dust. over
marissa [1.9K]
The answer to your question is option b

This is because if the trees are black, and covered with soot due to the pollution, caused by industrialisation, the white moths will be easily seen and constantly hunted by the predator, compared with the black moth population as they camouflage easily. Ultimately, the white moths would be hunted to such an extent that their population would dramatically decrease
8 0
3 years ago
The term for the premature separation of the highly vascular structure that acts as communication between the mother and the emb
DiKsa [7]

Answer:

Placenta

Explanation:

The term for the premature separation of the highly vascular structure that acts as communication between the mother and the embryo is the placenta.

The Placenta develops in a woman's uterus during pregnancy. It helps provide the necessary nutrients and remove the needed waste from the baby's blood.

3 0
3 years ago
Thermoreceptors detect body temperature and send impulses to the brain for analysis. If body temperature is low, the brain will
LenKa [72]

Answer:

A. Skeletal muscles

Explanation:

An effector is a group of cells, an organ, gland or any part of the body that acts to bring about a change in response to a nerve impulse from the CNS.  

In the case of thermogenesis as stated in the question above, where a drop in temperature is detected by thermoreceptors in the CNS, the part of the body that responds in returning the body temperature back to its baseline are the skeletal muscles. The skeletal muscles are the effectors that responded in repeated contracions to generate heat.

8 0
3 years ago
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