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Over [174]
3 years ago
7

Which of these scientists is best known for his idea that characteristics an individual gains in its lifetime could be passed on

to future generations, eventually leading to the creation of new species?
A)
Darwin
B)
Lamarck
C)
Linnaeus
D)
Mendel
Biology
1 answer:
Anna [14]3 years ago
8 0
This was Lamarck's idea. Here's an example: Suppose giraffes originally had short necks that they stretched to reach high-up leaves in the trees. This continuous stretching of the neck was passed onto offspring, who as a result had slightly longer necks. This continued for multiple generations until we get today's long-necked giraffe. Lamarck was on to something (that something being evolution by natural selection, which Darwin discovered), but his theory wasn't completely correct since organisms can only pass on genes (segments of DNA that code for a characteristic or function) to their offspring. Since "stretching" would not code into DNA, it wouldn't be passed onto offspring, proving Lamarck's theory incorrect.
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Explanation:

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4 0
4 years ago
In Drosophila, straight wings are dominant to curved wings (c), smooth eyes are dominant to sparkling eyes (spa), and tan body i
77julia77 [94]

Answer:

\frac{1}{8}

Explanation:

Straight wings are dominant over curved wings

Let Straight wings : H

curved wings : t

smooth eyes are dominant to sparkling eyes

let smooth eyes = H

spark ling eyes = t

tan body is dominant to ebony body color.

Again; Let tan body color be H

Let ebony color be t

If flies that are heterozygous for all three traits are crossed;

we have HtHtHt × HtHtHt

Then the selected trihybrid traits for the cross will be (HHH,HHt, HtH, Htt, tHH, tHt, ttH, ttt)

We will realize that from the punnet square in the diagram below, the proportion of the offspring would you expect to be heterozygous for all three traits (i.e HtHtHt) is asterisk in the punnet square and will be \frac{8}{64}

= \frac{1}{8}

7 0
4 years ago
he 14 species of finches on the Galapagos Islands evolved from a single species that migrated to the islands several million yea
Gala2k [10]

Answer:

The beak size will either increase or decrease, depending on the past evolution.

Explanation:

8 0
3 years ago
Which statement best explains how the rock shown in this photo was deformed​
meriva

Answer:

B. Stress caused by forces that stretch an area of the crust made the rock to break

Explanation:

From the picture inserted to this problem, we see a unit that has been severely fractured.

Fracturing results from the brittle deformation of a rock under applied stress.

  • Rock fracturing results in the formation of joints and faults.
  • We can obviously see different sets of joint sets on the body of the rock in the picture attacked.
  • Also, a prominent fault which resembles an extensional fault can also be seen.
  • Therefore, the stress caused the stretch of the area which in turn makes the rock the rock to break.
6 0
3 years ago
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A. Smallpox could make a good biological weapon because it is an airborne virus.

B. Smallpox can be prevented via vaccination and potentially prevented by HEPA filters.
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