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3 years ago

Why shouldnt we keep using coal and oil as a source of energy

Biology

1 answer:

leonid [27]3 years ago

6 0

Answer:

Your answer is most likely A - Mining and burning coal and oil destroys ecosystems.

Explanation:

The answer was found in part to the process if elimination. B is incorrect, coal being a good source of fuel, coal breaking down plants does happen but not at the scale of the excess pollutants from coal. Finally, D has a good point, that being we'll run out soon, however it also says it's good for plants which it is not.

Hope this helps and is correct!!!

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Question 21

Lelu [443]

Produce their own food

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4 years ago

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Which pair best matches a type of land cover with an appropriate land use?

shutvik [7]

b is the correct answer.

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At one time, Chondrichthyes were thought to have diverged from other vertebrates before the evolution of bone. Now we have concl

Ray Of Light [21]

Answer:

The correct answer would be - Characteristics can be lost in evolution.

Explanation:

The new evidence helps in developing a new hypothesis. In this case, new evidence proved that the Chondrichthyes diverged after the evolution of bone had started instead of before the evolution started. This process called atavism where an ancestral genetic trait reappears after having lost. This leads to loss of the traits in the evolution

This can take place by knocking the mutation out to overriding the gene by the old gene or overriding the new trait by the old trait during the evolution period.

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3 years ago

Given the following cross TtYyRr x TtyyRr (T = tall; t = short Y = yellow; y = green R = round; r = wrinkled), what proportion o

mihalych1998 [28]

Answer:

3/32 ttyyR-

Explanation:

Cross: Tall, Yellow, Rounded individuals with a tall, green, rounded individual

Parentals) TtYyRr x TtyyRr

Gametes) TYR, TyR, TYr, Tyr, tYR, tyR, tYr, tyr (Parent one)

TyR, TyR, Tyr, Tyr, tyR, tyR, tyr, tyr (Parent two)

We need to know what proportion of offspring is expected to be short plants with round, green seeds. So we need to identify the gametes for these traits. The genotypes are:

Shot → tt
Round → RR or Rr
Green → yy

⇒ Parent one can provide gametes tyR and tyr

⇒ Parent two can provide gametes tyR and tyr

(1/8 tyR x 2/8 tyR) + (1/8 tyR x 2/8 tyr) + (1/8 tyr x 2/8 tyR) =

2/64 ttyyRR + 2/64 ttyyRr + 2/64 ttyyRr =

1/32 ttyyRR + 2/32 ttyyRr =

3/32 ttyyR-

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3 years ago

Choose the definition of: invertebrates

slega [8]

<span>Invertebrates means having no backbone.</span>

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3 years ago