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kaheart [24]
2 years ago
6

What causes sunburn? Why do we have trouble perceiving the energy that causes it?

Biology
2 answers:
Alenkasestr [34]2 years ago
4 0

Answer:

sunburn is caused by too much exposure to ultraviolet rays.

Explanation:

Melanin is the dark pigment in the skin's outer layer that gives skin its normal color. When your skin face too much exposure to sun. UV rays in sun destroys the melanin due too which sunburn is caused

anzhelika [568]2 years ago
3 0
Infrared waves have less energy than visible light waves. Infrared waves are longer with more space between each high and low. Ultraviolet waves have more energy than visible light does. It's this energy that can hurt us.
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The Great Ice Age occurred during the _________.
AysviL [449]
OK so basically the ice age had occurred during the Pleistocene it was about 2.6 billion years ago
5 0
3 years ago
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Cephalization, the clustering of neurons and interneurons in the anterior part of the animal, is apparent in I) mammals II) cnid
zzz [600]

Option (III) .Cephalization, the clustering of neurons and interneurons in the anterior part of the animal, is apparent in <u>Planaria.</u>

What is planaria?

  • Planaria is a genus of planarians in the family Planariidae.
  • When an individual is cut into pieces, each piece has the ability to regenerate into a fully formed individual.
  • Currently the genus Planaria is defined as freshwater triclads with oviducts that unite to form a common oviduct without embracing the bursa copulatrix and with an adenodactyl present in the male atrium.
  • The testes occur along the whole body.
  • Planaria originally have habitats in dark, murky water which results in such sensitivity .
  • They are also sensitive to other stimuli such as chemical gradients, vibration, magnetic and electric fields .
  • Their central nervous system includes the anterior (head, brain and eyes) and middle (abdominal trunk and pharynx).

To know more about planaria, refer:

brainly.com/question/1917416

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8 0
2 years ago
Cellular respiration occurs in the body 24 hours per day. During exercise, the rate of cellular respiration increases. Why does
8_murik_8 [283]

Answer:

because the body requires a higher supply of oxygen

Explanation:

Cellular respiration can be divided into two different metabolic processes: aerobic respiration which needs oxygen (O2) and anaerobic respiration (without O2). The aerobic cellular respiration is produced when glucose molecules react with O2 in order to form ATP, the energy currency of the cell. Aerobic cellular respiration is the main source for generating ATP. During exercise, the requirement of O2 will be higher because the cellular respiration rate is increased in order to produce more energy (ATP). In consequence, during physical activities, it is required have to breathe faster to supply this O2, which enters into the lungs to be transported to all the cells through blood circulation.

6 0
3 years ago
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State the uses of excretory products in plants
d1i1m1o1n [39]

state the uses of excretory products in plants

Carbon dioxide, excess water produced during respiration and nitrogenous compounds produced during protein metabolism are the major excretory products in plants. Plants produce two gaseous waste products i.e. oxygen during photosynthesis and carbon dioxide during respiration.

Hope this helps :)

3 0
3 years ago
Describe the structure of amino acids, including what makes amino acids different from each other.
ludmilkaskok [199]
What I know is that amino acid has side chain, amine groupe ,and  groupe of carboxyl so what make them difference is side group where the is 20 different R-group which give each individual characteristics 

7 0
3 years ago
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