Darwin often used the phrase "_[blank]_" to suggest that species must have descended from preexisting species and that changes in the species took place over long periods of timeon the origin of species

descent with modification

descent with differential reproduction

survival of the fittest

Answers

Answer 1

Answer:

Answer:

Descent with modification

Explanation:

Darwin proposed the phrase "descent with modification" to explain that evolution of new species occurs when existing species accumulate genetic variation over the period of time.

Accordingly, the process of accumulation of genetic variations to get better adapted to the surroundings is followed by natural selection of individuals with beneficial adaptations that impact survival advantage to them. These individuals transmit the adaptations to their progeny.

Gradually, the process leads to the evolution of new species which differ from parental species in having the individuals carrying the beneficial adaptations.

Answer 2

Answer: The answer is descent with modification.
Descent with modification practically means that a species have changed appearance wise over long periods of time to adapt to their environments better.

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Describe how terracing reduces soil erosion.

Answers

terracing prevents erosion by eliminating or at least minimizing the slope of the ground which in turn slows the water run off. This allows plant life to root better which keeps the soil in place.

After the body has begun shivering, what explains why it would stop shivering? When body temperature returns to normal, the respiratory system sends a message to the skeletal system to stop shaking. When body temperature returns to normal, the nervous system sends a message to the muscular system to stop shaking. While body temperature is below normal, the nervous system sends a message to the skeletal system to stop shaking. While body temperature is below normal, the respiratory system sends a message to the muscular system to stop shaking.

Answers

After the body has begun shivering, it would stop shivering because when body temperature returns to normal, the nervous system sends a message to the muscular system to stop shaking. Thus, the correct option is B.

What happens during shivering?

Shivering is a remarkable thermogenic response which occurs in the homeothermic animals, including human beings, which involves the rapid, repeated skeletal muscle contractions leading to heat production through the inefficiency of ATP utilization by the body.

When the body temperature returns to normal range, the nervous system sends a message to the muscular system to stop the body shaking and shivering. While the body temperature is below normal, the nervous system sends a message to the skeletal system to stop shaking.

Therefore, the correct option is B.

Learn more about Shivering here:

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Answer:

Explanation:

When body temperature returns to normal, the nervous system sends a message to the muscular system to stop shaking.

a scientist plans to cut a segment of DNA so that it can be inserted into the DNA of a bacterium, a single celled organism. This scientist needs to use a special type of organic molecule to perform this cutting process. This molecule is

Answers

The answer is an enzyme.

When cutting DNA, scientist uses enzymes called restriction enzymes. These enzymes are naturally produced in bacteria as a defense against phages. So, enzymes cut DNA of the phages and thus inactivate it. Also, these enzymes do not cat DNA randomly, but on specific sites. This characteristic of restriction enzymes is used for some molecular biology techniques. All species' DNA contains target sites of restriction enzymes, but most organisms do not have restriction enzymes. Therefore, restriction enzymes are suitable for different techniques.

A)Fossil layers below the K-Pg boundary are younger than fossil layers above the K-Pg boundary.B) Non-avian dinosaur fossils are only found below the K-Pg boundary.

" C) Mammal fossils are not found below the K-Pg boundary as they appeared after the event.

D) Fossil layers containing dinosaurs and mammals are below the K-Pg boundary.

E) Fossil layers below the K-Pg boundary are older than fossil layers above the K-Ps boundary

Answers

Answer:

Explanation:

E(I copied off lil bro)

All animals that swim freely in the ocean are known as...?

Answers

the answer is nektonAnswer here

this answer includes animals and plants : phytoplankton

A specific example of how light year is used in space exploration. Pick one object in space (the nearest star, the nearest galaxy, the edge of the universe, etc.) and tell how far this object is from earth and how long it would take light to travel there.