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3 years ago

A scientist raised a species of fruit flies over several generations in separate containers. The diagram shows what

Biology

1 answer:

White raven [17]3 years ago

4 0

Answer:

This is allopatric speciation. The organisms were separated from each other by the containers. The separation caused them to evolve to the point that they were more likely to mate with each other than with a member of another tank.

Explanation:

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Helppppppppppppppppp pleaseee by the way is not the last one as yall can see it was incorrect

leva [86]

The answer is Position

5 0

3 years ago

How does carbon's high valence relate to its ability to form these large and complex bio molecules?

Stells [14]

B.

exhibit identical biochemical makeupB.

exhibit identical biochemical makeupB.

exhibit identical biochemical makeup

3 0

3 years ago

Adaptive immunity comprises two branches: humoral immunity and cellular immunity. What are the characteristics of each of the tw

kotegsom [21]

Answer:

Adaptive or acquired immunity is that we acquire throughout our lives through vaccines (active), breast milk (passive) or injection of specific artificial or natural antibodies to a certain pathogen (passive).

The two great arms of this immunity are the humoral and the cellular.

The humoral refers to the cytokines and immunomodulatory molecules that are responsible for transmitting fundamental messages between defense cells in order to coordinate the destruction of the pathogen between them.

Instead, cellular immunity speaks about cell lineage such as b, t, tcd4 lymphocytes, natural killers, plasmacytes, etc.

It can be said that the humoral factor is the one that coordinates the pathways and the relationships between the cells of the acquired immunity, both are important because the two need each other for adaptive immunity to work.

Explanation:

Examples of the humoral factor: pro and anti inflammatory cytokines, interleukins, complement chain, antibodies, TNF alpha, beta, etc.

Examples of cellular factor: plasmacyst, b lymphocyte, t lymphocyte, NT lymphocyte

6 0

3 years ago

You are studying leaf development in a member of the mustard family. You identify several mutants of interest in this plant and

monitta

Answer:

•The relationship between the twist and the wild type flower in the first crossing is known as a COMPLETE DOMINANCE

•The relationship between the forked and the wild type flower in the second crossing is also known as a COMPLETE DOMINANCE

•The relationship between the pale and the wild type flower in the third crossing is known as an INCOMPLETE DOMINANCE

Explanation:

A complete dominance is characterised by having one of the genes (the dominant gene) in an heterozygous condition, completely masking the effect of the other (the recessive gene) of thesame allelic pair. E.g. if the genes in allelic is represented with Aa, "A" is said to completely dominate "a" if it does not allow "a" to Express itself phenotypically.

The heterozygous condition is always the result of the F1 generation

and the F2 generation of a Complete dominance is always characterised by a phenotypic ratio of 3:1 which is in line with the results gotten from the first crossing and the second crossing as stated in the question.

An complete dominance is characterised by having an intermediate progeny in the F1 generation which was evident in the result of the third crossing. Also a phenotypic ratio of 1:2:1 in the F2 generation is also a characteristic feature of an Incomplete dominance relationship which was also evident in the third crossing.

6 0

3 years ago

I will give 50 points!! PLEASE ANSWER: List and briefly describe 8 major terrestrial biomes.

lilavasa [31]

Forest: A large area covered in trees.

Taiga: A snow forest.

Tundra: A flat area with no trees.

Desert: A large, dry area covered in sand

Savanna: A grassy plain in tropical and subtropical regions with very few trees.

Grassland: A large open area covered in grass.

Chaparral: A land with vegetation that consists of shrubs and bushes with thorns.

Mixed Forest: A forest with two or more kinds of different trees.

Hope this helps!

4 0

3 years ago