_______ is/are the raw material of evolutionary changea. Genetic drift
b. Nonrandom mating
c. Assortative mating
d. Mutations

Answers

Answer 1

Answer: d. Mutations

Mutations are a naturalphenomenon that are alterations or slight modifications that occurs in the DNA.It actually is typical for these modifications to occur in most DNA in our chromosomes.Though the changes both intrinsically and extrinsically can only be the resultof such need, insignificant or have an insidious effect. It can’t be avoidedand it usually happens every time cells undergoes mitosis and meiosis. Further,most of these modifications in the copied cells are good. Lastly, the mutationprocess happens in the basic structure that shapes every cell and everycreature so it just a natural phenomenon, mostly.

Answer 2

Answer:

Final answer:

Mutations are the raw material of evolutionary change, introducing genetic variation required for natural selection. Genetic drift, Nonrandom mating and Assortative mating, while part of the evolutionary process, are not the 'raw materials'.

Explanation:

The raw material of evolutionary change is mutations. Mutations are a change in a DNA sequence that can lead to different phenotypic traits. The DNA sequence changes can come in various forms such as deletions, insertions, or substitutions in the base pair sequence. These Mutations are a source of genetic variation, which is crucial for the process of natural selection. Without mutations, evolution could not occur because there would be no variation for natural selection to act upon. Genetic drift, Nonrandom mating and Assortative mating are mechanisms of evolution, not raw materials.

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The percentage of crossing-over between 4 linked genes (K, L, M, N) are below. Put them in the correct sequence.Between M and N: 8%

Between K and N: 5%

Between K and L: 16 %

Between N and L: 11%

Between M and L: 19%

Answers

Answer:

NL=8, JK=2, KL=2, LM=2

Explanation:

K is between J and M

JM=JK+KM

JM=KL+KM

JM=2+4

JM=6

The length of JM is 6 units.

From the figure it is clear that

MN=JN-JM

MN=14-6

MN=8

From the figure it is clear that

NL=ML+MN

NL=2+8

NL=10

What is shown in the image? A cell with no nucleus is shown. prokaryote eukaryote chloroplast mitochondrion

Answers

Answer:

if the image has no nucleus shown then it's a prokaryotic cell.....

prokaryote mutation cellllll

During meiosis, genetic recombination may occur more than once through the process of ____________________, resulting in an increase in genetic variability.

Answers

Answer:

Crossing-over

Explanation:

Crossing-over is a phenomenon that occurs in the Prophase stage of meiosis I. Two chromosomes of a homologous pair comes together in a process called SYNAPSIS to form a TETRAD structure. While the chromosomes synapses, breaks occur at corresponding points in the non-sister chromatids i.e in one chromatid of each chromosome. Since the chromosomes are homologous, breaks at specific points mean that the segments that are broken off contain specific genes i.e. alleles. The broken sections are then exchanged between the chromosomes to form complete new units, and each new recombined chromosome of the pair can go to a different daughter sex cell.

In meiosis, the maternal and paternal chromosomes can be shuffled into daughter cells in many different combinations. The resulting chromosomes are not entirely maternal, neither are they entirely paternal. This ensures genetic variation in sexually reproducing organisms.

crossing over (aka recombination)

According to the biological species concept, for speciation to occur, _____. according to the biological species concept, for speciation to occur, _____. the number of chromosomes in the gene pool must change large numbers of genes that affect numerous phenotypic traits must change at least one gene, affecting at least one phenotypic trait, must change changes to centromere location or chromosome size must occur within the gene pool

Answers

The answer is; at least one gene, affecting at least one phenotypic trait, must change

This change, due to mutation, may result in an extreme trait in a small proportion of the population . If this extreme trait proves to be favorable with the environment it will continue to increase in the population with every generation. Eventually, the trait will become common in most individuals and the population will have speciated.

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Answers

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What structure is common in all 6 kingdoms of living organisms?

Answers

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