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Dmitrij [34]
3 years ago
8

What is a fossil record​

Biology
2 answers:
nataly862011 [7]3 years ago
7 0

Answer:

It is a record to tell which time the rock is from

Explanation:

They compare fossils with rock from the same level to tell what period it is from

OleMash [197]3 years ago
6 0

Explanation:

The "fossil record" refers to the placement of fossils throughout the surface layers of the Earth. Older fossils are buried more deeply than younger ones. Scientists use the placement of fossils as a guide for determining when life forms existed, and how they evolved.

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What is the current percentage of D alleles in the population? __________________
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Answer:

The population varies

Explanation:

The number of the dorminat alleles varies with the genotyoe. In addition, the factors as mutation also contribute to the mutation of the genes. The mutation in the DNA causes a different set of instruction in the DNA. This then affects the gene expression in an organism.

5 0
4 years ago
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Match the gastric phase on the left (1-3) with the correct description on the right (4-6):
dem82 [27]

Answer:

1 and 5,

2 and 6,

3 and 4

Explanation:

Intestinal phase: stomach empties and decreases secretions

The intestinal phase is the phase where stomach empties its contents(chyme) and decreases secretion. In this stage the duodenum responds to arriving chyme and moderates gastric activity through hormones and nervous reflexes.

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Gastric phase: stomach secretes juice and mixes food into chyme

The gastric phase is a period in which swallowed food and semi-digested protein ( peptides and amino acids ) activate gastric activity  which secretes juice and mixes food into chyme. About two-thirds of gastric secretion occurs during this phase.

Cephalic phase: prepares stomach for arrival of food

The cephalic phase of digestion is the gastric secretion that occurs prior to when food enters the oral cavity. Cephalic phase result from the ignition of  visual, olfactory, and auditory inputs to the brain and also induce anticipatory responses i.e  prepare the gastrointestinal tract for the meal.

4 0
4 years ago
How many bones are in the human body?
liraira [26]

Answer:

206 bones

Explanation:

4 0
3 years ago
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a segment of dna shows bases in this bases in this order AGT CAC GCA complete the corresponding Dna strand ; TCA GTG
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Genes contain the instructions for building what molecules?
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