Which statement is an example of mutualism?

In most cases, which group ultimately makes decisions regarding environmental issues?

Marrrta [24]

The government, makes decisions for environmental issues.

5 0

2 years ago

A marine ecologist counts the number of octopus in three different intertidal regions that are each two hectares. The octopus co

patriot [66]

Answer:

The best estimate of population density of this particular Octopus spieces is (TOTAL POPULATION OF THE OCTOPUS)/(TOTAL AREA OF LAND)

Population density = (15/6) Octopus per hectare

Explanation:

To estimate the population density of a spiece in a particular area of land, we count the total number of the specie in the area and divide the total number by the area of the sampling region.

Above, the marine ecologist counts the number of octopus in three different intertidal regions that are each two hectares. The octopus counts are 7, 2, and 6 respectively.

Therefore, the total number of Octopus is 7 + 2 + 6 making 15. The regions are 2 hectares each. Since there are three of the intertidal regions, the total area is 2 x 3(6 hectares).

Therefore, Population density = (15/6) Octopus per hectare

6 0

3 years ago

In some breeds of mice, yellow coat color is

Elis [28]

In the exposed lethal genes cause the individual's death during embryionic development before being born. H0m0zyg0us dominant individuals do not get born. Yellow: 2/3. Grey: 1/3. Phenotypic ratio: 2:1

<h3>What is complete dominance?</h3>

When the dominant allele completely masks the expression recessive allele, we talk about complete dominance.

This is the case of individuals that are heter0zyg0us for a particular gene and express the dominant trait.

The dominant allele is hiding the expression of the recessive allele.

<h3>What are the lethal genes?</h3>

Refer to genes that impede the normal development of the individual.

They can cause death during embryo development before the individual gets born,

They can cause the individual's death after being born and before reaching sèxual maturity.

Let us assume that mice color is coded by a single diallelic gene that expresses complete dominance.

Available data:

Yellow color is dominant over grey color.

Yellow is coded by the dominant allele Y
Grey is coded by the recessive allele y

Genotype YY → Yellow and lethal

Genotype Yy → Yellow

Genotype yy → Grey

The cross would be as follows,

Cross: Yy x Yy

Gametes) Y y Y y

Punnett square) Y y

Y YY Yy

y Yy yy

F1) Considering ONLY the successfully born individuals

Genotype

2/3 = 50% of the progeny is expected to be heter0zyg0us, Yy.

1/3 = 25% of the progeny is expected to be h0m0zyg0us recessive, yy.

Phenotype

2/3 = 50% of the progeny is expected to be yellow, Yy.

1/3 = 25% of the progeny is expected to be grey, yy.

The phenotypic ratio is 2:1

You will learn more about lethal genes at

brainly.com/question/13654244

brainly.com/question/14932405

5 0

1 year ago

Explain mechanism of blood clotting in humans

Zigmanuir [339]

Explanation:

Coagulation, also known as clotting, is the process by which blood changes from a liquid to a gel, forming a blood clot. It potentially results in hemostasis, the cessation of blood loss from a damaged vessel, followed by repair. The mechanism of coagulation involves activation, adhesion and aggregation of platelets, as well as deposition and maturation of fibrin.

In all mammals, coagulation involves both a cellular (platelet) and a protein (coagulation factor) component.The system in humans has been the most extensively researched and is the best understood

4 0

2 years ago

How is mitosis and meiosis similar

asambeis [7]

They both mitosis and meiosis are similar by they are independent cells

4 0

2 years ago

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