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kakasveta [241]
3 years ago
9

Question 18 OT 25

Biology
2 answers:
vova2212 [387]3 years ago
8 0

Answer:

A. It is too dangerous to observe directly.

Hope this helps! :D

Scorpion4ik [409]3 years ago
8 0
Scientists use a model because the continents move to slow to observe directly. The continents move about 2in per year along plate boundaries. That 2 inch movement is too small to be observed directly that’s why we use technology in order to measure the movement
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1. A brown mink crossed with a silver-blue mink produced all brown offspring. When these F1 were crossed among themselves, they
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Answer:

The correct answer is -

Parental - BB and bb

F1

Genotypes: 100% Bb  

F2

Genotypes: ¼ BB, ½ Bb, ¼ bb

Explanation:

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BB and bb

   B    B

b  Bb   Bb

b  Bb   Bb

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gametes : B, b and B, b

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B  BB   Bb

b   Bb    bb

the genotype of F2 : 1:2:1 = ¼ BB, ½ Bb, ¼ bb

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