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ASHA 777 [7]
3 years ago
11

How much of the earths surface is covered in continental crust

Biology
1 answer:
LuckyWell [14K]3 years ago
3 0
The answer is 30 to 80 percent its in google
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The vernal equinox has just occurred in the Northern Hemisphere. Which of the following would you expect to be true?
xxMikexx [17]
I assume the answer is B and C
4 0
2 years ago
A(n) ___________ provides a translation of the project scope into specific activities.
Andreas93 [3]
Controlling the project
5 0
3 years ago
Hemophilia is a sex-linked recessive trait in humans. If a father and a son are both hemophiliacs, but the mother is normal, her
saul85 [17]

Answer: XHXh (Note: the H's are superscripts.)

Explanation:

Hemophilia is a sex-linked recessive trait which means that the males having one altered copy of the gene is enough to cause the medical condition( as they have only one X chromosomes and females have two)

In this case the genotype of father and son is such that they are affected by hemophilia.The son has mother's X chromosome and father's Y chromosome.

XhY is the genotype of father and son. As mother would be heterozygous because she is not affected, her genotype will be XHXh.

7 0
3 years ago
The modern synthesis brought together Darwin's theory of evolution with Mendelian genetics. Why was this so important?
MakcuM [25]

Answer:

Option C

Explanation:

Options for the question are

a.  It demonstrated that nothing in biology makes sense except in the light of evolution.

b.  It demonstrated that species arise from other species.

c.  It provided a quantifiable mechanism to explain gradual evolutionary change.

d.  It was the first time that change in biological organisms was observed.

e.  It was not very important to evolutionary biology.

Solution -

The term modern synthesis by coined by Julian Huxley and the goal of this synthesis was to understand and determine how genetics bring evolutionary changes in a population and with this objective it combined the Darwin’s theory of evolution and Mendel’s work on heredity. Later on scientist Dobzhansky under this synthesis found that genetic mutation causes variation through the process of natural selection and hence lead to evolutionary changes in a population even if they are isolated for a long time.  

Hence, option C is correct

3 0
3 years ago
In the classic Meselson and Stahl experiment, E. coli are first grown in 15N-enriched media (0th generation) and, subsequently,
mars1129 [50]

Answer:

The correct answer is - option e.)

Explanation:

The experiment that was performed by Meselson and Stahl was created to prove that DNA replication is a semiconservative process.

When Bacteria grow on 15N media they incorporate the isotype of nitrogen and after few generations, the culture moved to 14N media where it incorporates as they replicate in semi-conservative mode and one DNA strand comes from the Parent DNA.

The right option for question one is Option (e) Run as one band, at a position expected for DNA containing a 14N:15N ratio equal to 1.

6 0
2 years ago
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