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Nadya [2.5K]
3 years ago
7

What event marked the end of the Cretaceous Period?

Biology
2 answers:
xeze [42]3 years ago
8 0

Answer:

Cretaceous–Paleogene extinction event

Explanation:

The Cretaceous–Paleogene extinction event, also known as the Cretaceous–Tertiary extinction, was a sudden mass extinction

iragen [17]3 years ago
4 0

Answer: the great extinction

Explanation:  which the dinosaurs died out, except for the birds, of course.

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Coastal flooding occurs when
Elodia [21]

Answer:

B: When severe weather occurs causing large waves to hit the coast.

Explanation:

when coastal flooding occurs, storms push the seasonal high tides towards the shore which causes the flooding

8 0
3 years ago
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What is the frequency of a wave that has a wave speed of 120 m/s and a wavelength of 0.40 m
Talja [164]

Answer:

300Hz

Explanation:

8 0
3 years ago
Genetic drift occurs when a population of organisms which normally don't travel great distances, like fruit flies, floats on a t
earnstyle [38]

Answer:

True.

Explanation:

Genetic drift occurs when a species migrates into another one, therefore making a new variation of the species.

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3 years ago
When does osteogenesis begin?
castortr0y [4]

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a. When a fetus is 13-15 weeks old

Explanation: is correct

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3 years ago
Patterns of inheritance are usually more complicated than what is predicted by Mendelian genetics. Explain four possible excepti
Vinvika [58]

Answer:

Please find the explanation of the four possible exceptions to Mendelian genetics below.

Explanation:

Genetics, generally, has to do with how genes are inherited or transferred from parents to offsprings. Gregor Mendel, however, explained this concept in his principles of inheritance called Mendelian genetics. There are, however, exceptions to this mendelian principle called Non-mendelian pattern of inheritance i.e patterns of inheritance that do not follow Mendel's principles. Four of them are explained below:

- Incomplete dominance- This non-mendelian inheritance pattern occurs when one allele of a gene does not completely mask its allelic pair, but instead forms an intermediate phenotype. This is in contrast with Mendelian genetics that proposes complete dominance. For example, a red and white flower produce a pink flower (intermediate).

- Codominance- This is another non-mendelian inheritance where two alleles of a gene are simultaneously expressed. For example, roan cattles is a combination of both red and white hairs.

- Multiple alleles: Some traits in a population are controlled by more than two alleles, as explained in mendelian inheritance. Examples of trait controlled by multiple alleles is height in humans.

- Sex-linked inheritance: Some traits are controlled by genes on sex chromosomes i.e. X and Y chromosomes. This genes exhibit inheritance pattern that are different from Mendel's. Example is haemophilia disease controlled by an affected gene on the X-chromosome.

8 0
2 years ago
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