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4 years ago

Explain the process of evolution through isolation that results in speciation.

Biology

2 answers:

Contact [7]4 years ago

8 0

Answer:

Evolution is a natural phenomenon by which inheritable characteristics of a species change over generations.

It mainly relies on processes such as natural selection, genetic drift, migration, and mutation.

Heredity, genetic variation, and differential reproduction result in evolution with the help of natural selection.

Isolation (geographical or reproductive) prevent the flow of genetic material between the populations. With time, the populations evolved in different species as a result of adaptation towards different habitat or niche (natural selection).

For example, in Galapagos islands finches were isolated through different islands. The flow of genetic material was restricted. In addition, natural selection helped different populations to adapt different characters as an adaptation towards different food resources.

As a result, different populations evolved into different species with varied body size, beak shape, and feeding behavior.

Mariulka [41]4 years ago

6 0

Specialization. Specialization is the evolutionary process by which biological populations evolve to become distinct species. The biologist Orator F. Cook coined the term 'specialization' in 1906 for the splitting of lineages or "cladogenesis", as opposed to "anagenesis" or "phonetic evolution" within lineages.

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Match the items on the left with the best corresponding statement on the right. 1. contains tightly packaged DNA molecules R.C.

Brrunno [24]

Answer:

1. Chromosomes

2.Carl Correns

3. Mutation

4. Mitosis

5. Gregor Mendel

6. DNA

7.R.C. Punnett

8. Incomplete dominance

9. Meiosis

Explanation:

1. Chromosomes are described as thread-like structures. They are called DNA molecules because they are made up of DNA that are coiled up tightly. They are found in the nucleus of the cell.

2. Carl Correns was a botanist and geneticist who worked with flowers called four o'clocks. With the flowers he discovered different patterns of heredity, or non-mendelian heredity. He conducted this experiment to determine up to what extent do the Mendelian inheritance patterns remain valid.

3. Mutation is a change in in DNA. Since DNA controls how an organism develops ( in terms of appearance, structure, and behavior), a change in DNA would change many of those characteristics. Mutations can be good and bad, but it is essential to evolution and genetic diversity.

4. Mitosis is a type of cell division where the daughter cells get the same number of chromosomes as the parent. In other words, they are the exact copy of the parent cells. This occurs in body cells.

5. Gregor Mendel is known as the father of genetics for his laws of inheritance. His work on pea plants, he established the laws of heredity; Law of segregation; Law of Independent Assortment; and Law of Dominance.

6. DNA is short for Deoxyribonucleic Acid. It is a molecule that carries all the genetic information of an organism. It stores this information in the form of a code using 4 bases; Guanine, Adenine, Cytosine, and Thymine.

7. Reginald Crundall Punnett was a geneticist who linked statistics and mendellian genetics to come up with the Punnett Square. The Punnett Square is used to determine the probability of genotypes of offsprings, given the genotypes of the parents.

8. Incomplete dominance is a non-mendellian inheritance where instead of the dominant trait masking the recessive trait, the traits blend together. You can see this with some plants where when a white flower is crossed with a red flower, it results in pink flowers.

9. Meiosis is a type of cell division that occur in sex cells. The resulting daughter cells only have half the original number of chromosomes as the parent cells. The daughter cells only have half of the parent cells because unlike in mitosis, the cell divides twice.

3 0

4 years ago

Read 2 more answers

David has sustained an injury to his neck that has resulted in the complete loss of sensation to the posterior side of his upper

slavikrds [6]

Answer;

Radial nerve

Explanation

-The nerve that is most likely to be damaged as a result of his injury is the radial nerve.

-The radial nerve is a nerve in the human body that supplies the posterior portion of the upper limb.

-It innervates the medial and lateral heads of the triceps brachii muscle of the arm, as well as all 12 muscles in the posterior osteofascial compartment of the forearm and the associated joints and overlying skin.

4 0

3 years ago

What structures do plants need that animals do not need? Why?

Alina [70]

Answer: a cell wall

Explanation: a cell wall is a barrier that protects the plant cell. Animal cells do not need this becuase they have a cell membrane which also protects the cell.

5 0

3 years ago

Give 4 examples of types of specialized cells.

Lady_Fox [76]

Nerve cells, Blood cells, Reproductive cells, Skin cells

8 0

3 years ago

In humans, XO individuals are females with Turner syndrome and XXY individuals are males with Klinefelter syndrome. Red green co

Nata [24]

Answer:

The correct answer is option E) "Nondisjunction at either meiosis I or meiosis II in the mother".

Explanation:

Nondisjunction is a phenomena at which chromosomes are not properly separated during anaphase. This can either happen at meiosis I or meiosis II during oogenesis. Nondisjunction would explain the XO chromosomic condition of the daughter with Turner syndrome as well as the X-linked recessive allele of the red green color blindness. Nondisjunction happened in the mother because the father could not inherited an X-linked condition.

8 0

3 years ago