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nasty-shy [4]
2 years ago
15

The evolution of populations due to chance is

Biology
1 answer:
Nataly [62]2 years ago
4 0

Answer:

D). genetic drift

Explanation:

Genetic drift is the change in an allele frequency over a period of time. This event has to be random and a chance event.

For example: In a population of a flowering plant there are two types of flowers, blue and yellow. Due to a fire many yellow flowers are destroyed by chance. Now the resultant population will have more blue flowers and when they reproduce the population will eventually evolve to have more blue flowers. Effect of genetic variation is more pronounced in a small population since its easy to disturb the allele frequency.

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If a person decides to switch from drinking freshly squeezed orange juice to calcium-enriched orange juice after a yearly checku
kaheart [24]

Answer:

<u>Nutrition and health benefits</u> are the most likely motivation ,if a person decides to switch from drinking freshly squeezed orange juice to calcium-enriched orange juice after a yearly checkup,

Explanation:

As the Calcium enriched orange juice contains calcium almost equal to that of milk , hence it is an essential mineral which helps in building and maintaining strong bones and teeths.

It is also an excellent source of vitamin D helping the body to absorb more calcium . Thus providing excellent nutrition and health benefits.

Hence <u>Nutrition and health benefits</u> are the most likely motivation

7 0
1 year ago
Here is a hypothetical situation: An area of the country has received a record amount of rainfall this year coupled with a mild
Ronch [10]

Answer:

Zika virus and West Nile virus are the two pathogens which causes more diseases due to increase the population of mosquito.

Explanation:

Zika virus belongs to the family of Flaviviridae. Aedes mosquitoes which are active at day time are the carrier of this virus. West Nile virus is also spread through the bite of mosquito. The infected mosquito is the main cause of spreading of this disease. This virus is spreading too fast in the United States of America in the summer season where the population of mosquitoes increases.

3 0
1 year ago
Somatic cells of roundworms have four individual chromosomes per cell. How many chromosomes would you expect to find in an ovum
andrezito [222]

Answer:

2 chromosomes

Explanation:

The cell of an eukaryotic organism like roundworm contains the Nucleus, which harbors the genetic material embedded in the chromosome. The number of chromosomes of that organism is contained in each cell.

Somatic cells, also called body cells, are all other cells asides sperm and eggs, that form the tissues and organs of an organism. Somatic cells are usually diploid i.e two sets of chromosomes from each parent. In this question, the roundworm has 4 chromosomes in its somatic cell.

The reproductive cells or sex cells (sperm and eggs) of an organism always result from meiotic division of specialized cells.

Since meiosis is a kind of division that results in cells with their chromosome number reduced by half (haploid), it therefore means that the ovum and sperm cell will be expected to contain 2 chromosomes each.

This way, when fertilization occurs (sperm and egg fusion), the resulting zygote, which will eventually develop into an adult organism, will have 4 chromosomes.

3 0
1 year ago
The lipid components of cellular membranes often include:
BARSIC [14]
The lipid components of cellular membranes often include phospholipids and cholesterol. Phospholipids is made up of glycerol, fatty acids, phosphate and organic derivatives such phospho inositol and choline. Cholesterol is the component of the membrane lipid which determine the fluidity of the memebrane; it also participates in membrane singalling system. 
8 0
1 year ago
Read 2 more answers
How might an individual's own cells lead to false verdicts of guilt.
Gre4nikov [31]

Answer:

Through a circumstance known as "secondary transfer DNA", or "Touch DNA".

Explanation:

Most times when a crime is committed, DNA samples are obtained from surfaces in the scene where the crime was committed. There is a very huge possibility of picking up the DNA of someone who was never at the scene of the crime and this is a result of a condition known as Touch DNA.

Because we touch several objects which can be moved to different locations and touch people who are also always mobile, our DNA cells can find their ways to a crime scene where we had never physically been to. This can lead to false verdicts of guilt.

5 0
1 year ago
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