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3 years ago

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A forest in North America is rich in flower-bearing trees and coniferous trees. A forest fire damaged all these trees, but their

seeds were still present in the soil. This allowed the trees to regenerate. To which process does this refer?

1 answer:

ycow [4]3 years ago

3 0

Secondary succession

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The first organisms arose from non-living molecules found on early earth. Which theory best describes how

enyata [817]

Answer:

abiogenesis

Explanation:

a (not) biogenesis (coming from other life forms)

Biogenesis would mean that it's coming from other life forms,

Natural selection is a part of evolution (what is there to select?)

Variation is also a part of evolution (not related)

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3 years ago

A month-long study of plant growth was conducted. Three groups of plants were grown in various amounts of light: Group A receive

fomenos

Assuming the graph that shows plant groups B and C have a lower growth rate than group A, this shows that every plants needs a certian amount of sunlight to grow. Since they get their energy from the sun, it is the most crucial to a plants survival. If plants dont get the energy they need to live, as producers, primary consumers dont get get energy from producers. If primary consumer cant get energy, neither can secondary consumer and so forth.

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3 years ago

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In natural selection, what must be true of traits that are passed down through generation?

Radda [10]

Natural selection is the process by which individuals who are best suited to the environment tend to leave (on average) more offspring than others.

Evolutionary changes take place over many generations and through millions of years of natural selection. For the genes to survive, they must be among the strongest.

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3 years ago

Read 2 more answers

In a unique species of plants, flowers may be yellow, blue, red, or mauve. All colors may be true-breeding. If plants with blue

Zolol [24]

Answer:

F1) 100% bbRr, red flowered plants.

Explanation:

<u>Available data:</u>

flowers may be yellow, blue, red, or mauve
colors may be true-breeding
the cross of blue-flowered plants with red-flowered plants, produce plants that have yellow flowers
F2 generation: 9/16 yellow, 3/16 blue, 3/16 red, and 1/16 mauve.

Knowing that the phenotypic ratio is 9:3:3:1, we can assume that there are two genes involved in the flower color expression. We can name these genes B and R with a dominant and a recessive allele each (B, b and R, r respectively).

According to the first cross, we might establish the following genotypes:

1st Cross: blue-flowered plant x red-flowered plant

Parentals) BBrr x bbRR

Gametes) Br, Br, Br, Br bR, bR, bR, bR

F1) 100% BbRr, yellow plants

Parentals) BbRr x BbRr

Gametes) BR, Br, bR, br

BR, Br, bR, br

Punnett square) BR Br bR br

BR BBRR BBRr BbRR BbRr

Br BBRr BBrr BbRr Bbrr

bR BbRR BbRr bbRR bbRr

br BbRr Bbrr bbRr bbrr

F2) 9/16 yellow ---> 1/16 BBRR + 2/16 BBRr + 4/16 BbRr + 2/16 BbRR

3/16 blue ------> 1/16 BBrr + 2/16 Bbrr

3/16 red---------> 1/16 bbRR + 2/16 bbRr

1/16 mauve ----> 1/16 bbrr

So,

Yellow-flowered plants: BBRR, BBRr, BbRR, BbRr
Red-flowered plants: bbRR, bbRr
Blue-flowered plants: BBrr, Bbrr
Mauve-flowered plants: bbrr

According to these genotypes, the second cross would be like following,

2nd Cross: true-breeding red-flowered plants with true-breeding mauve flowered plants.

Parentals) bbRR x bbrr

Phenotype) Red Mauve

Gametes) bR, bR, bR, bR br, br, br, br

Punnett square) bR bR bR bR

br bbRr bbRr bbRr bbRr

br bbRr bbRr bbRr bbRr

br bbRr bbRr bbRr bbRr

br bbRr bbRr bbRr bbRr

F1) 100% bbRr, red flowered plants.

6 0

3 years ago

many prople try to eliminate fat from their diets. which is one reasom it is necessary for humans to eat fat

Ira Lisetskai [31]

Explanation:

Fats are very important classes of food needed by the body. Excess fat is not good for the body.

The following are the reasons fats are essential for the body;

They provide energy for the body too.
Fats are good insulators helping to keep the body warm.
They help the body absorb vitamins because some vitamins are only soluble in fats.
They help in growing of the cell.

learn more:

Food brainly.com/question/8790597

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3 years ago