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stepladder [879]
3 years ago
8

Christina and her friends are discussing the theory of evolution. One friend states that there is no evidence to support the the

ory of evolution. Which line of evidence could Christina offer to contradict her friend's statement?
A. All animal structures have evolved to perform a specific function.

B. Fossil evidence demonstrates the major changes of most species.

C. Humans have bred dozens of dog varieties from ancestral wolves

D. Vertebrate embryos share common ancestral features such as tails

Explain.
Biology
1 answer:
Olegator [25]3 years ago
5 0
A- if you look up the word “evolution” it will show many types of animals forming up into what we call humans
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Answer:

- Physical and chemical barriers

- non-specific innate responses

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<u>The differences are...</u>

The first barrier is the physical and chemical barrier. It is the first line of defense when in contact with outside sources, this can be through the skin, earwax, nose-hair, etc.

The second barrier, the non-specific innate response, is after these outside sources have somehow managed to pass through the first barrier. They come into contact with cells and enzymes that help to defeat them.

The third barrier, the specific adaptive response, is the body's way of dealing with pathogens that the body has encountered before. (B cells activate)

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There are initially 1000 bacteria in a culture. The number of bacteria doubles each hour. The number of bacteria N present after
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There are several information's of immense importance already given in the question. Based on those information's the answer can be easily deduced. 
Initial number of bacteria in the culture = 1000
Number of bacteria after t hours = 1000 (2)^t
Then
1000 (2)^t = 50000
2 ^t = 50
t = 5.6

I hope the procedure is clear enough for you to understand.
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Glucose is broken down in the chemical processes of aerobic respiration.
Papessa [141]

\bold{\huge{\purple{\underline{ Answer }}}}

<u>Aerobic </u><u>respiration </u>:- Aerobic respiration is process of respiration in which complete oxidation of glucose takes place in the presence of oxygen

<u>That </u><u>is</u><u>, </u>

<u>Aerobic </u><u>respiration </u><u>is </u><u>takes </u><u>place </u><u>in </u><u>four </u><u>stages </u><u>:</u><u>-</u>

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In aerobic respiration, Glucose with 6 carbon atoms broken into 2 pyruvic acid each with 3 carbon atom and produces water + CO2 + energy.

<h3><u>Whereas</u><u>, </u></h3>

<u>Anaerobic </u><u>respiration </u>:- is the process of respiration in which incomplete oxidation of glucose takes place in the absence of oxygen

The end products of glucose in anaerobic respiration is

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<u>Hence</u><u>, </u><u>Option </u><u>D </u><u>is </u><u>the </u><u>correct </u><u>answer</u><u>.</u>

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jarptica [38.1K]

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