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d1i1m1o1n [39]
3 years ago
6

__________ is the leading cause of preventable blindness in children.

Biology
1 answer:
adell [148]3 years ago
4 0
Vitamin A deficiency is the leading cause of preventable blindness in children.
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How many rings does chlorophyll a and b have​
In-s [12.5K]

Explanation:

Each has one chlorin ring- chlorin is a form of porphyrin.

Chlorophylls  are comprised of a ringed molecule, chlorin, a hydrogenated form of porphyrin which contains a magnesium ion at the center, bonded to four atoms of nitrogen.  Varying types of Chlorophyll have side chains, which affect the absorption spectrum of the molecule for instance A has a methyl group bonded to the C7 position, while B has an aldehyle (CHO) group at this location.

Embedded within the thykaloid membrane of chloroplasts, chlorophyll a and B mainly absorb orange-red and violet-blue wavelengths and convert light energy into chemical energy for the process of photosynthesis. This occurs in the light-dependent reactions of photosynthesis, within chloroplasts of plants. The range of wavelengths absorbed by a pigment is its absorption spectrum while it reflects those outside of this range. Plants appear green as this region of light is reflected by the pigments.

Learn more about Photosynthesis at brainly.com/question/4216541

Learn more about cellular life at brainly.com/question/11259903

#LearnWithBrainly

6 0
3 years ago
How can you demonstrate that plant prepare their own food on its leaves ? write with experiment​
Musya8 [376]

Answer:

Answer

take a plant having partially green and white leaves.

Destarch the plant leaves by placing the plant in dark room for three days.

The potted plant then placed in the exposure of sunlight for three days.

pluck the leaf of the plant and allow to boil it in alcohol to remove its green colour.

6 0
3 years ago
Can someone please help me I don't understand the and my parents don't under please
bearhunter [10]

432hz x 432hz = 2228

Explanation:

the simple explanation is shushh

5 0
3 years ago
Some blue-green algae contain gas vacuoles that allow them to adjust the air concentration inside their cells. How does this int
kupik [55]

Answer:

float

Explanation:

like a balloon or an air filled raft

it helps them float

Gas vacuoles help bacteria in buoyancy and enable them to float at the desired depth. They do so by inflating and deflating the vesicles

byjus

3 0
2 years ago
Proteins are three dimensional molecules made of strands of amino acids (imagine a ball of string). There are 20 different amino
zlopas [31]

Answer:

A series of nonpolar amino acids would most likely be located in the interior region of the tridimensional molecule.

Explanation:

Proteins are formed by linearly arranged amino acids, each with a side chain: the R-group.

Of the 20 different amino acids that compose the proteins, about half of them -10- are non-polar. Their R-groups are not stable if they are in contact with water, meaning that non-polar amino acids are hydrophobic.

When proteins are synthesized, they acquire a three-dimensional structure that makes them more stable. Lineal polypeptides get folded and turn into a shape that makes them more stable in the environment and capable of accomplishing their biological role. When they are in an aqueous media, their bent shape leaves the hydrophilic R-groups in contact with water. The hydrophilic R-groups stick in the center of the polypeptide, facing the protein interior, and avoiding interaction with water.

3 0
3 years ago
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