Answer:
C. Crossing Over
Explanation:
Crossing over, also called recombination, is the process by which non-sister chromatids of homologous chromosomes exchange a segment of their chromosomal material with one another. The process of crossing over occurs only in the prophase I stage of meiosis.
The process is responsible for genetic variation in the gametes produced, thereby, leading to organisms that are genetically unique.
Answer: how much does each contribute?
Explanation:
Nature and nurture of the pyschological traits such as intelligence or personality are contributed by the internal genes and the environment. The question arises is the fact that how much each factor that is the internal genetic structure as well as the external environment contributes to the development of these traits. It is the concern of the pyschologists.
Answer:
<em>T</em><em>he photograph shows</em><em> soil layers</em><em><u> </u></em><em><u>.</u></em><em><u>T</u></em><em><u>he darkest layer of the soil at the top of the photograph</u></em><em><u> is</u></em><em><u> The Horizon</u></em><em><u>.</u></em>
Explanation:
Called the A horizon, the topsoil is usually the darkest layer of the soil because it has the highest proportion of organic material.
Answer:
- <u>Ecosystem</u>: Native Forest
- <u>Biotic components</u>: trees, shrubs, herbs, grasses, fungi, lichens, rodents, foxes, puma, small birds, owls, birds of prey, amphibians, reptiles, snakes, insects, microorganisms.
- <u>Abiotic components</u>: Sunlight, dead organic matter, river, stones, rocks, fertile soil, nutrients.
Explanation:
Ecosystems include all the biotic, physical, and chemical components of nature, continuously interacting and depending on each other. The ecosystem is composed of living beings and non-living things that interact and depend on each other. These are the biotic and abiotic factors.
A few examples of abiotic factors are solar light, minerals, water, air, gases, soil, and humidity.
Examples of biotic factors are plants, animals, insects, microorganisms, etc.
An example of an ecosystem in my locality is the native forest in the hills.
The forest is composed of many vegetable species, among which we may find trees, shrubs, herbs, grasses. We can also find lichens and fungi. Many mammal species such as little rodents, foxes, puma. Many bird species, among which we can find owls and some other birds of prey. There are different kinds of snakes and reptiles. There are amphibian species near the shore of the river that is crossing the forest. The soil is quite fertile, providing nutrients to the organisms. There is too much organic matter of vegetable origin, such as leaves or fallen and dead trees. Many microorganisms live in this dead matter. Insects are everywhere. There are some steep slopes in which stones, rocks, and tree roots hold the ground.
- <u>Ecosystem</u>: Native Forest
- <u>Biotic components</u>: trees, shrubs, herbs, grasses, fungi, lichens, rodents, foxes, puma, small birds, owls, birds of prey, amphibians, reptiles, snakes, insects, microorganisms.
- <u>Abiotic components</u>: Sunlight, dead organic matter, river, stones, rocks, fertile soil, nutrients.
The best and most correct answer among the choices provided by the question is the fourth choice. The procedure that could be done to increase the validity is to m<span>easure the oxygen in liters. </span>I hope my answer has come to your help. God bless and have a nice day ahead!