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3 years ago

A muscular tube that connects your mouth to your stomach

1 answer:

6 0

The esophagus is a long tube that connects the mouth to thestomach, which is within the ribcage

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Name two ways that water can enter the atmosphere.

vampirchik [111]

Answer:ways Water enters the atmosphere evaporation, transpiration, excretion and sublimation:

Explanation:

Transpiration is the loss of water from plants (via their leaves).

Sublimation is when ice or snow transforms directly into water vapour without going through a liquid phase (i.e. they do not melt).

Animals excrete water by respiration and by passing urine.

Evaporation is a type of vaporization that occurs on the surface of a liquid as it changes into the gas phase.

7 0

2 years ago

Many bacteria, including E. coli, are capable of growing under both anaerobic and aerobic conditions. Some mutations are introdu

Sloan [31]

Answer:

Due to inability to survive in aerobic condition.

Explanation:

The strain dies when exposed to a normal laboratory atmosphere instead of nitrogen gas atmosphere because the mutation causes change in the capability of the strain to survive in the aerobic conditions. This mutation inactivate several enzymes which is also responsible for their capabilities of surviving under both anaerobic and aerobic environment so that's why the strain dies when exposed to normal atmosphere..

5 0

3 years ago

Which organism would not carry out cell respiration

olga nikolaevna [1]

Answer:

D. Bear

Explanation:

The answer is bear because a bear is an animal. Everything but animals can carry out cellular respiration.

3 0

3 years ago

In guinea pigs hair straightness or curliness is thought to be governed by a single pair of alleles showing incomplete dominance

Nimfa-mama [501]

Answer:

Frequency of allele S is p $= 0.4939$

Frequency of allele C is q $= 0.666$

The population is not in Hardy-Weinberg equilibrium

Explanation:

Given -

Number of individuals with straight hair $= 244$

Number of individuals with curly hair $= 444$

Number of individuals with Wavy hair $= 312$

Let "p" represents the frequency for allele for straight hair and "q" represents the frequency for allele for curly hair

$p^2$ represents the frequency of genotype "SS"

$p^{2} = \frac{244}{1000} \\= 0.244$

$q^2$ represents the frequency of genotype "CC"

$p^{2} = \frac{444}{1000} \\= 0.444$

$2pq$ represents the frequency of genotype "SC"

$2pq = \frac{312}{1000} \\= 0.312$

Frequency of allele S is p

$= \sqrt{0.244} \\= 0.4939$

Frequency of allele C is q

tex]= \sqrt{0.444} \\= 0.666[/tex]

For being in Hardy Weinberg's equation-

$p+q=1\\$

Substituting the values in above equation, we get -

$0.4939+0.666\neq 1$

hence, the population is not in Hardy-Weinberg equilibrium

4 0

3 years ago

How does geographic distribution of organisms support evolutionary theory?

Serga [27]

Because the organism is distributed across the world, and isn't seen anymore, scientists can conclude tat they must have evolved. They can compare one species to the fossils they may have found, and determine that they were related. Then by looking at the species on another part of the world compare the same fossils to other animals and determine that they are similar, sharing a common ancestor.

3 0

3 years ago