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bulgar [2K]
3 years ago
13

Some researchers have proposed that the human population was reduced to fewer than 10,000 individuals as a result of a catastrop

hic event that occurred about 50,000 years ago, and that all modern humans are descendants of this small population. If this proposal is true, it would be an example of __________.
Biology
1 answer:
Sidana [21]3 years ago
8 0

Answer:

The correct answer is bottleneck effect.

Explanation:

The phenomenon of bottleneck effect takes place when some natural events like a tsunami or an earthquake result in the destruction of the majority of the population and leave behind some to survive. Due to the bottleneck affect the genetic diversity within the population gets reduced drastically as the majority of the population gets perished, this results in the eradication of some of the genes from the population, while the left genes are passed onto the next progenies.  

The bottleneck effect results in the generation of the new population as the leftover individuals further inbreed and give rise to a new population comprising the leftover genes. It is not necessary that the left genes passing on to the next generation are better than the one, which got eliminated, as the left genes have got selected by chance. Thus, it can be concluded that the given case is an illustration of the bottleneck effect.  

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_________ bind to specific antigens on pathogens causing them to clump together.
zavuch27 [327]

Antibodies  bind to specific antigens on pathogens causing them to clump together.

When antibodies bind to antigens and cause pathogens to clump together this is called?

Agglutination reaction

It acts on antigen-antibody reaction in which the antibodies cross-link particulate antigens resulting in the visible clumping of the particle. There are two types, namely active and passive agglutination

What is antibody agglutination?

Agglutination is the process that occurs if an antigen is mixed with its corresponding antibody called isoagglutinin. This term is commonly used in blood grouping. This occurs in biology in two main examples: The clumping of cells such as bacteria or red blood cells in the presence of an antibody or complement.  

What are binding antibodies?

Neutralizing antibodies can be confused with binding antibodies, which are responsible for binding to a pathogen and alerting the immune system to its presence so white blood cells can be sent to destroy it

Learn more about antibodies:

brainly.com/question/25604063

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7 0
1 year ago
The action of the shifting continental plates of Earth has important effects on the course of ___ of living organisms by reprodu
Troyanec [42]

Answer:

The action of the shifting continental plates of Earth has important effects on the course of speciation  of living organisms by reproductively isolating populations or allowing previously separated populations to interbreed..

Explanation:

The formation of geological barriers such as mountains special cause of allopatric type, these barriers cause isolation which prevents two or more groups from mating each other regularly and finally there is speciation. On the other hand  the movement of continental masses for example can cause the union of islands that allows a new genetic crossing between populations.

3 0
3 years ago
I need help please asap please and thank you
Sav [38]
Where’s the question
8 0
2 years ago
What is meant by the term "antiparallel?"
Alex

Answer:

A term applied to two molecules that are side by side but run in opposite directions. The two strands of DNA are antiparallel. The head of one strand is always laid against the tail of the other strand of DNA.

Explanation:

4 0
3 years ago
Which one of the statements explains a characteristic of both all living organisms and all nonliving material?
Romashka-Z-Leto [24]

Answer:

The correct answer is - option E.

Explanation:

Living organisms and non living materials both are made up of atoms and these atoms are bind together by specific kinds of the bonds such as hydrogen bond, covalent bond and many more that help in determining their shape and structure and determined their physical characteristics.

These organism follow laws of chemistry and physics such as the law of the thermodynamics, law of gravitational force, homeostasis and various kind of forces and interaction.

Thus, the correct answer is - option E.

8 0
3 years ago
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