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mestny [16]
3 years ago
7

Birds have a _____-chambered heart. two three four

Biology
2 answers:
tester [92]3 years ago
8 0
Birds, just like humans, have a four-chambered heart.
kolezko [41]3 years ago
7 0

four. is the correct answer

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PLEASE HELP WORTH 20 POINTS WILL MARK BRAINLIEST!!!!!!
777dan777 [17]
The answer is D. 3,4,5,1,2
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4 years ago
Which of the statements are characteristics of a good hypothesis? -is developed from data that cannot be replicated -relies heav
matrenka [14]

Answer:

is created from careful research and logical reasoning

is able to be tested using validated techniques

 

Explanation:

A hypothesis can be defined as a prediction/expectation that is made in order to understand a phenomenon from the real world. This prediction must be testable and measurable by using the scientific method. In science, a good hypothesis clearly defines the relationships between two or more variables (independent variables and dependent variables). Moreover, a good hypothesis must also be written in simple and precise language, which means that its statements must be understandable (and verifiable) for any person and/or researcher working in the field.

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3 years ago
Where does the cellular respiration occur in the biosphere? Check all that apply?
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Answer:

what's the answers it give u

Explanation:

I might be able to help

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3 years ago
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Both Darwin and Lamarck proposed mechanisms by which species might evolve. Although Darwin first published his ideas in the mid-
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Answer:

More evidence accumulated supporting Darwin's ideas than could be found to support Lamarck's.

Explanation:

7 0
3 years ago
The proportions of the bases are consistent within a species; however they do vary between species. Using the base-pair rules, c
Snezhnost [94]

Answer:

The correct answer would be:

                  A         G          C         T

Human:   31          19          19       31

Cow:         28         22      22         28

Salmon:     29       21       21         29

Wheat        27      23        23        27

Yeast         31         19       19         31

Explanation:

According to the rule of Chargaff which states or explains the amount of the A, T, G, and C bases in the DNA molecule. It says that the DNA of any organism should have a pyrimidine and purine ratio of 1:1. This means the amount of A would be equal to T and the amount G should be equal to the amount of C.

It also says that the amount of a and G would be equal to the amount of C and T. So on the base of this we can find the missing value in the table:

                    A         G          C         T

Human:   31          19          19       31   (A= T and G=C)

Cow:         28         22      22         28  (A= T and G=C)

Salmon:     29       21       21         29   (A= T and G=C)

Wheat        27      23        23        27 (100 - A+T = G+C)

Yeast         31         19       19         31 (A= T and G=C)

5 0
3 years ago
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