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jok3333 [9.3K]
3 years ago
15

describe how our darkens in the presence of sun. in your description, be sure to name the pigment that darkens our skin and desc

ribe how skin darkening protects our DNA from damage
Biology
1 answer:
Aleonysh [2.5K]3 years ago
5 0
Special cells in the skin<span>, called melanocytes, make two different types of melanin, eumelanin and pheomelanin. ... Melanin helps </span>protect our skin<span> and hair by filtering out potentially harmful ultraviolet (UV) radiation from the </span>sun. The UV light from thesun<span> can </span>damage DNA<span> and cause cancer</span>
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What are the male and female parts of a flower?
Dmitry [639]

Answer:

the male part of a flower is called the stamen, it consists of a long slender stalk, the filament, with a two-lobed anther at the tip.

the female part of a flower is called the pistil, it consists of the stigma, the style, the overy and the ovule.

5 0
3 years ago
Rank the following elements by increasing atomic radius carbon aluminum oxygen potassium
Vlada [557]

Answer:

The elements in increasing order of atomic radius: oxygen, carbon, aluminum, potassium

Explanation:

The distance from the center of the nucleus to the outermost shell of the electron is known as the atomic radius of an element. The atomic radius decreases rightward along each period (row) of the table due to the increase in effective nuclear charge (the charge of the nucleus equal to the number of protons). Across a period, electrons are added to the same energy level and the increasing number of protons causes the nucleus to exert more pull on these electrons, which makes the atomic radius smaller.  Atomic radius increases down each group (column) of the periodic table because of the addition of electrons to higher energy levels, which are further away from the nucleus and the pull of nucleus weakens. Another reason for the increase in atomic radius is the electron shielding effect, which is the reduction of the attractive force between a nucleus and its outer electrons due to the blocking effect of inner electrons

While moving from left to right in the second period, c arbon comes before  oxygen  and so oxygen will have a smaller atomic radius than  carbon. While moving down the periodic table, al uminum comes before  potassium even if they are not in the same period. So aluminum 's atomic radius will be smaller than that of  potassium  but bigger than that of  carbon  and  oxygen.

.

4 0
3 years ago
Pioneer species in plant succession arrive at cleared areas to germinate. however, when they grow, the shade they produce makes
Deffense [45]
<span>Other factors found within its environment can make pioneer species still germinate and thrive. Factors like wind, presence of animals, rain, among others, can help in the germination of the pioneer species even if its immediate environment becomes inhospitable through time.</span>
3 0
3 years ago
An organism's physical appearance is called?​
pav-90 [236]

Answer: phenotype. An organism's physical appearance, or visible traits. genotype. An organism's genetic makeup, or allele combinations.

7 0
3 years ago
Which scenario would result in a population growth of zero?
PSYCHO15rus [73]

Answer:

D

Explanation:

common sense was used for this problem

8 0
3 years ago
Read 2 more answers
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