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77julia77 [94]
3 years ago
13

What are two modes of genetic variation of organisms

Biology
1 answer:
Arada [10]3 years ago
7 0

The genetic variation of organisms has three sources they are mutation, gene flow and sexual reproduction.

Explanation:

Genetic variation are caused by mutation , random mating, random fertilization and recombination between homologous chromosomes during meiosis.

It is a variation in alleles and genes, among the populations. There is a genetic variation within the family of closely- related individuals. If it is a neighborhood there are many families and there is also genetic variation among that group.

An exact genetic copy of the parent organism is produced in asexual reproduction. It only introduces the genetic variation into the population if a random mutation in the organism's DNA is passed on to the offspring.

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List several causes of biodiversity loss.
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Answer:

Biodiversity is the different types of living organism found in this earth. The biodiversity is getting extinct due to the natural and human calamity.

Habitat loss and fragmentation: The excessive loss of trees due to urbanization and deforestation, species has lost their habitat and become extinct.

Over-exploitation: The over-exploitation of the natural resources has directly result in the biodiversity loss of plants and animals.

Pollution: The different types of air pollution, water pollution and noise pollution has damaged the large number of organisms on earth.

Invasive species: The introduction of alien species in the environment can cause the deterioration of the original species inhabiting in the environment.

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4 years ago
CONCLUSION why is baseball called “the national pastime”?<br><br> Need help
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Answer: The baseball is a sport played in the eastern United States.

Explanation:

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This sport is continued to be enjoyed in summer and spring. It was named so more than 150 years ago.

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3 years ago
Stage that begins with fertilization
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Development of the embryo begins at stage 1 when sperm fertilizes an oocyte and together they form a zygote. Human development begins after the union of male and female gametes or germ cells during a process known as fertilization (Conception).
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When bacteria are inoculated into a new sterile nutrient broth, their numbers don’t begin to increase immediately. Instead, ther
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Explanation:

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