What is the first species to populate an area

How does halving the hawk population affect the grass, rabbits, and snakes

nadya68 [22]

Answer:

Rabbits and snakes increase in number but grasses decrease in number.

Explanation:

If the population of hawk is decreases to half then the population of rabbits and snakes increases because hawk feeds on rabbits and snakes. The amount of grasses also decreases due to increase in the population of rabbits which feeds on these grasses. Hawks controls the population of rabbits and snakes when these hawks are decrease in number then the ecosystem will destabilize by increasing number of rabbits and as a result vegetative cover decreases quickly.

4 0

3 years ago

The gene for flower position in pea plants exists as axial or terminal alleles. Given that axial is dominant to terminal, list a

____ [38]

Answer:

F1

A A

a Aa Aa

All the offspring have flower located at axial position

F2

A a

A AA Aa

a Aa aa

Three offspring with genotype i,e Aa, Aa and Aa will have flower located at axial position

Only offspring with genotype "aa" will have flower located at terminal position

Explanation:

Let the allele "A" represent the characteristics of axial position of flower

Let the allele "a" represent the characteristics of terminal position of flower

Given -

"A" is dominant over "a"

F1 generation -

Two parents with homozygous genotype for both A and a are crossed . The punnet square for the cross between "AA" and "aa" is as follows -

A A

a Aa Aa

Thus the genotype of offspring is "Aa"

Since, "A" is dominant over "a", all the offspring have flower located at axial position

F2 generation-

The cross between two parents having heterozygous genotype "Aa" will take place .

The punnet square for the cross between "Aa" and "Aa" is as follows -

A a

A AA Aa

a Aa aa

Three offspring with genotype i,e Aa, Aa and Aa will have flower located at axial position

Only offspring with genotype "aa" will have flower located at terminal position

8 0

3 years ago

Identify which type of study the following example describes.

Travka [436]

Answer:

They are training animals in a maze and recording physiological changes in their brains, Stimulating a brain structure and recording subsequent changes in movement, Introducing two adults that are potentially attracted to each other, and then measuring their sex hormone levels, Measuring the brain volumes and intelligences of people in a group, Observing enlarged cerebral ventricles in the brains of many people with schizophrenia, Severing the connections between visual regions and the rest of the brain in animals, and observing the animals’ failure to recognize an object, and Studying the relationship between a sex hormone treatment and strength of an animal’s mating behavior.

Explanation:

7 0

4 years ago

How did the backyard bird feeders in the article increase competition in that ecosystem?

Ronch [10]

Answer:

<em>Backyard bird feeding is a well known </em><em>type of human–untamed life </em><em>communication in specific regions of the northern and southern side of the equator.</em>

Explanation:

In territories where sustaining is mainstream in the Southern Hemisphere, supplemental encouraging may excessively profit acquainted winged creature species while driving with decreases of local species, possibly due to hetero specific competition.

However, Backyard bird feeders can bring about constructive outcomes on some feathered creature species, for example, improved overwinter endurance, expanded populace sizes and geographic range extension.

3 0

4 years ago

Looking into your microscope, you spot an unusual cell. Instead of the typical rounded cell shape, the cell has a very narrow mi

Fittoniya [83]

Answer:

Explanation:

Cell completes its division by karyokinesis and cytokinesis.

The division of nucleus is known as karyokinesis which divided into two main phases known as inter-phase and mitotic phase.

Inter-phase is further divided into G1, S and G2 phase, in S phase, replication of DNA occurs. Mitotic phase is further divided into prophase, metaphase, anaphase and telophase.

After telophase, Cytokinesis occurs. Cytokinesis is the process of the division of cytoplasm, which occurs after karyokinesis. In cytokinesis, the cell contains a very narrow middle separating 2 bulging ends and the cells looks like as the number 8.

5 0

4 years ago