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iVinArrow [24]
3 years ago
13

How does crossing over result in diversity within a species?

Biology
1 answer:
mestny [16]3 years ago
5 0

Crossing over, or recombination, is the exchange of chromosome segments between nonsister chromatids in meiosis. Crossing over creates new combinations of genes in the gametes that are not found in either parent, contributing to genetic diversity.

Hope it helps

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The two basic functions of meiosis are to _____.
Sergeu [11.5K]
Answer:

The two basic function of meiosis is listed below.

1.  Genetic recombination:
                                           In meiosis crossing over occurs that results into genetic recombination.

2. Ensure constant chromosome number:
The number of chromosomes reduce to half in germ cells that reunite in sexual reproduction and ensure the survival of species by keeping constant chromosome numbers. Have a good day.
4 0
3 years ago
Upon examining samples of water and mud from a nearby river, you come across an unidentified organism. The organism is unicellul
Tasya [4]

Answer:

A protist

Explanation:

In the given question, the characteristic of an unidentified organism are given which are:

1. The organism is unicellular and autotrophic which means that it is a producer and belongs to a plant like organism.

2. The membrane bound nucleus means that the organism is an eukaryote.

The organism is thus an unicellular, autotrophic and an eukaryote could be a species of algae which is considered a protist. The protists are the organisms which shows characteristic of the ukaryotes but are not considered true plants and animals.

Thus, a protist is correct answer.

3 0
3 years ago
What determines the type of igneous rock that forms from magma? a. The heat and pressure the magma is exposed to b. Whether the
OLEGan [10]

Answer:

c. Magma composition and cooling rate.

Explanation:

A rock cycle can be defined as a concept used to describe the continuous process that leads to a rock's creation, formation, transformation from one form to another, destruction and reformation over a specific period of time. The natural phenomenons that influences the rock cycle are weathering, plate tectonic activity, erosion, etc.

Basically, the three (3) main types of rocks are; metamorphic rock, sedimentary rock and igneous rock.

All igneous rocks are produced from magma (lava) and formed at the Earth’s surface, thereby, causing them to have a coarse texture and dark colors.

Generally, the cooling and solidification of magma (lava) leads to the formation of an igneous rock, either when the melted rock is still inside the continental crust of the Earth or at volcanoes on the Earth's surface.

Hence, magma composition and cooling rate determines the type of igneous rock that forms from magma. Some examples of an igneous rock are granite, obsidian, tuff, basalt, rhyolite, andesite, pegmatite, dacite, scoria, pumice, etc.

4 0
2 years ago
Which of the following is not true concerning rainforests? a. Twenty-five percent of western pharmaceuticals are derived from ra
KATRIN_1 [288]

The correct answer fro above statement is:

<h3> c. Half of all rainforest plants have been tested for their medicinal properties.</h3><h3>Explanation:</h3>

Twenty-five percent of the fresh components in cancer medications are particularly rainforest plants.Rainforests are essential because they serve control global climate trims and rain. Water that disappears from trees comes in other regions as rain.Twenty-five percent of Western pharmaceuticals are obtained from rainforest components. But since only a minute portion of rainforest organisms have been investigated, as the rainforest species escape so do possible remedies and therapies for life-threatening disorders.

7 0
3 years ago
Which one of the following will increase the size of a population?
Sonbull [250]
C. Decreased death rate is the answer
6 0
3 years ago
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