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Viefleur [7K]
3 years ago
7

In the fossil record, there is no evidence of anything living on land before plants. Why are plants necessary before more compli

cated animals can evolve?
A. Plants were not needed.
B. Plants were needed to produce Carbon dioxide.
C. Plants were needed to change the soil content.
D. Plants were needed to produce oxygen.
Biology
1 answer:
stiv31 [10]3 years ago
6 0

Answer:

maybe option D is correct

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Carbohydrates provide the body with
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Energy

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It is C) cell-mediated response 
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Genetic variability is beneficial for a species because it enhances that species’ ability to adapt to changing conditions. Why,
Nuetrik [128]

Answer:  Genetic variability  is beneficial for the survival and adaptation. But a flaw in DNA Replication Control or check may leads to the death of cell or may contribute in the disease or cancer.

Explanation:

Almost every species comes with the diversified collection of genes (genome). And some of the diversity comes from the spontaneous mutation but it occurs on a very low frequency. The genes either express constitutively or occasionally for an important task like genes responsible in the generation of ATP by glycolysis, tricarboxylic acid cycle, electron transport chain etc. While some of the genes are inducible that is only activated in a response to an external stimuli. Genetic variations in inducible genes might account for the adaptability or negligible change in a species genetic expression but genetic variation in constitutive or house keeping genes leads to cancer cell formation or even cell death. like mutation occur in p53 genes dysregulate the cell cycle or mutation occur in DNA polymerase enzyme that is responsible for the incorporation of NTPs (nucleotide tri-phosphates) according to wobble base pairing rule in order to make a complementary new strand from the old or parent strand, will eventually leads to cause mutations ultimately results in cell death or cancerous cell formation.

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3 years ago
a patient has a history of poor nutrition. he has skin rashes, bleeding gums, and a cut that hasn't healed in a long time. what
julsineya [31]

Answer:

Lack of Vitamin C

Explanation:

lack of Vitamin C would cause all of these to happen

7 0
3 years ago
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6. In Chicago "Smiling Gus" Winkler met up with some of Chicago's most famous gangsters. They included:
viktelen [127]

Answer:

Al Capone, Fred "Killer" Burke, and Bugsy Moran.

Explanation:

Augustus "Smiling Gus" Winkler was a big-time gangster who had his fingerprints surgically altered so as not to be identifiable through fingerprint technology. He was part of Eagan's Rats gang and would participate in some of the most notorious crimes such as the St. Valentines Massacre in 1929.

When he moved up north, he met up with some of the world's famous gangsters like Al Capone, Roger Touhy, Fred Burke, and Bugsy Moran. But in 1933, to secure himself, he turned evidence against his friends and accomplices. But he was not to be safe for long, for he was gunned down by unknown assailants rumored to be ordered by Frank Nitti on October 9, 1933.

6 0
3 years ago
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