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Kazeer [188]
3 years ago
6

Which of the following processes generates a continuum (spectrum) of varying phenotypes?

Biology
1 answer:
Maurinko [17]3 years ago
4 0

Answer:

option B: Polygenic inheritance

Explanation:

Polygenic inheritance in genetics and plant breeding can be defined as a type of inheritance whereby  one or a single trait or  characteristics(color)  is controlled by multiple genes (two or more genes). it is a continuous variation that depicts a normal distribution curve

the phenotype of a plant or an animal increases if when there is an increase in the number of genes controlling a particular trait or characteristics. polygenic inheritance are non-Mendelian form of inheritance in  nature and a  single trait expressed is as a result of the interaction of many or multiple genes that are quantitative genes in nature. examples are weight, skin color, height, e.t.c

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name two major vessels that return oxygen-poor blood to the heart. What are the damages for each? Where do they terminate?
Serga [27]

Answer:

1. Head, neck, upper limb, thorax - super vena cava - top of the right atrium.

2. Lower limb - inferior vena cava - bottom of the right atrium.

Explanation:

The Heart pumps the oxygen-rich blood to the different parts of the body to Otake oxygen and nutrients to these organs and then takes the oxygen-poor blood returns from the body to the heart.

The two major vessels that return oxygen-poor blood to the heart are 1. superior vena cava (SVC) that drainages Head, neck, upper limb, thorax and terminate at top of the right atrium, and 2. inferior vena cava (IVC), Lower limb and terminate at bottom of the right atrium.

1. Head, neck, upper limb, thorax - super vena cava - top of the right atrium.

2. Lower limb - inferior vena cava - bottom of the right atrium.

4 0
3 years ago
Water harvesting, the collection of rainfall and run off for future use, has been practiced for thousands of years; but in some
lina2011 [118]

Rainwater is normally free from dangerous substances, which makes it perfect for irrigation schemes. Added significant benefit is that it decreases the requirement for fresh water. It is important particularly in regions with low water levels.

Another benefit might water harvesting have in these areas with land erosion due to runoff are as follows;

Reduces Water Shortages

In temperate areas, the strain on public water supply can become hard, even in advanced countries. Rainwater decreases the uncertainty of water shortages. Using rainwater for non-essential actions such as spraying the lawn means less pressure on the supply of safe drinking water.

Replenishes Groundwater

Extensive rainwater harvesting projects with the water collected into storage containers or tanks are important to assure a sustainable groundwater level.

Reduces soil erosion

Heavy rainfall generates erosion because some of the soil is transferred along with the passage of water. Soil erosion exhausts agricultural land of topsoil and nutrients, provides to sediment build up in waterways and, in advanced cases, can turn land inadequate for agriculture. Harvesting rain checks a great chance of soil erosion before it can originate.

4 0
3 years ago
How many electrons fulfill each shell of the elemental structures
Agata [3.3K]
It takes 8 electrons to fill a shell.
7 0
3 years ago
Read 2 more answers
Cardiac muscle does not exhibit tetanus beacuse it has A. exclusively aerobic respiration. B. fast Ca2 channels. C. a long absol
Nina [5.8K]

Answer:

C, a long absolute refractory period.

Explanation:

Tetanus is not possible in cardiac muscle tissue because cardiac cells have longer action potentials and a very long refractory period compared to other cells. This helps prevent the heart from cramping and seizing up.

5 0
2 years ago
A bond of the following elements would be of what type? Drawing a model may be helpful.
Tresset [83]

The answer is ionic :)

7 0
3 years ago
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