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Keith_Richards [23]
4 years ago
14

What is a vestigial structure? A. A structure that has no use in the organism B. A structure with similar shape but a different

use C. A structure that is only in index fossils D. A structure that contains isotopes !!!!apex!!!!!
Biology
1 answer:
krek1111 [17]4 years ago
4 0

Answer: A, a structure that has no use in the organism

Explanation:

A vestigial structure is an anatomical feature that no longer seems to have a purpose in the current form of an organism of the given species.

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What step in cellular respiration happens first
weeeeeb [17]

I believe it is glycolysis that is the first step in cellular respiration. Complete oxidation of glucose via respiration = four step process used to convert chem energy in glucose to ATP. 1. Glycolysis: This is where one 6-carbon molecule of glucose is broken down into two molecules of the three-carbon pyruvate.

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3 years ago
A bacteria culture begins with 15 bacteria which double in amount at the end of every hour. How many bacteria are grown during t
pochemuha
Here is a list showing how the bacteria grows:

Begin      -   15
1st hour   -   30
2nd hour  -   60
3rd hour   -  120
4th hour   -   240
5th hour   -   480
6th hour   -   960
7th hour   -   1,920
8th hour   -   3,840
9th hour   -   7,680
10th hour -   15,360
11th hour -   30,720
12th hour -   61,440

As you can see, the number of bacteria present is doubled at the end of each hour, as the question states. However, the question is not asking for the total number of bacteria at the end of the 12th hour; it is asking for the bacteria GROWN during the 12th hour.

Because there were 30,720 bacteria at the end of the 11th hour, and 61,440 at the end of the 12th, the number of bacteria that grew during that last hour must be 61,440 - 30,720 = 30,720 bacteria.

(P.S. the answer would be 61,440 if it was asking for the TOTAL number of bacteria at the end of the 12th hour)
7 0
3 years ago
Why are the interactions and tissues in the menstural cycle considered to be feedback mechanisms
mamaluj [8]

it is considered feedback mechanisms because the menstrual cycle only happens when the hormone is released, it causes the target tissues to react, that reaction is the feedback.

7 0
3 years ago
Which of the following is an examples of a species:
N76 [4]

Answer:

C Horses and Zebras

Explanation:

Zebras are a different species of a horse that lives in Africa.

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Answer: that is the answer

supplying oxygen and nutrients to tissues,Explanation:

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