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Liula [17]
3 years ago
8

What is biological evolution

Biology
2 answers:
Lina20 [59]3 years ago
6 0
Biological Evolution- is the refers to the cumulative changes that occurs ina population over a time.
Nana76 [90]3 years ago
5 0

Biological evolution is the genetic changes that occur in a population over successive generations. It is a process whereby changes occur on the genetic level of a population and it is being transferred from one generation to another. Biological evolution takes place as a result of natural selection and its result may be minimal (unnoticeable) or significant (noticeable). Biological evolution includes microevolution (minor genetic changes within a specie or population) and macroevolution (large evolutionary changes above the species level).

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A student designs an experiment to test substances X, Y, and Z, to determine which one is a catalyst for the reaction: A + B ® C
rewona [7]

The answer is option A.

The Student identifies the test tube that stops bubbling first contains the catalyst.

Because Catalyst is a substance which increases the rate of reaction, and the reaction shows that when a product is obtained bubbles formed.

<span>When the student added X, Y and Z to the test tubes. The one which is a catalyst fastened the reaction.</span>

7 0
3 years ago
In the F2 generation of a dihybrid cross two phenotypes appear in the ratio 1:1. two phenotypes appear in the ratio 3:1. four ph
Bezzdna [24]

Answer:

four phenotypes appear in the ratio 9:3:3:1

Explanation:

<em>For a dihybrid cross in which the two genes concerned obey simple dominant/recessive law and are independently assorting, </em><em>four phenotypes are produced in the ratio 9:3:3:1. </em>

The dominant gene takes up the largest ratio (9/16) while the recessive gene takes up the smallest (1/16). Any deviation from 9:3:3:1 and the number of phenotypes produced from a dihybrid cross is an indication that the genes involved do not obey Mendelian laws.

8 0
2 years ago
1. Flowering plants and bees have influenced each other's evolution, providing an example of
Doss [256]

Answer:

1. coevolution

2. abiogenesis

3. Endosymbiont Theory

4. It's estimated that over 99 percent of the species that have existed on Earth at some point in time are extinct today.

5. Coevolution implies that the evolution of one species is dependent on and works in relation to the evolution of another species. This may cause positive or negative impacts and could be beneficial to both organisms or only to one.

6. This theory states that the first building block of life that allowed for reproduction of organisms was the development of self-replicating RNA. This hasn't been able to be fully demonstrated in any science experiment but is based on the idea that there are RNAs that can catalyze biochemical reactions on their own without proteins.

7. This process points to the development of structures through the envelopment of smaller cells that perform specific functions. This is how eukaryotic cells evolved from prokaryotic cells.

8. This experiment was important because it showed that, in the right primordial soup, organic compounds could develop from inorganic compounds.

Explanation:

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8 0
3 years ago
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What is the main function of the nervous system in the human body?
Tju [1.3M]

Answer:

The nervous system transmits signals between the brain and the rest of the body, including internal organs. In this way, the nervous system's activity controls the ability to move, breathe, see, think, and more. The basic unit of the nervous system is a nerve cell, or neuron.

Explanation:

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1 year ago
How are hormones produced by endocrine glands typically transported to target cells?
ankoles [38]

Hormone Signaling. The glands of the endocrine system secrete hormones directly into the extracellular environment. The hormones then diffuse to the bloodstream via capillaries and are transported to the target cells through the circulatory system.

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