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Cloud [144]
3 years ago
11

Ddt was banned from use as a pesticide in the united states because

Biology
2 answers:
mixas84 [53]3 years ago
5 0
The answer is D. All of the above . Hope this helps!
netineya [11]3 years ago
3 0
The answer to your question should be D. all of the above
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The land and the aquatic are the two types of global food webs
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What do transcription and translation have in common?
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Plate movements help drive the rock cycle by helping to form ________the source of igneous rocks
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Read 2 more answers
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
2 years ago
A researcher had 15 purebred wikl mice which were brown and all females, they were all mated with a male called Bob, All offspri
cestrela7 [59]

Complete question:

A researcher had 15 pure-bred wild mice which were brown and all were females. They were all  mated with a male called Bob. All the offspring were brown. These were then crossed among  themselves with the following results: 293 brown and 115 white.

(i). Determine the color of Bob.

(ii). Determine which color is dominant.

(iii). Work out the ratio of brown to white in the ‘grandchildren.’

(iv). If the researcher crosses two of the white 'grandchildren', determine the color of their  offspring.

Use the Punnett square to work out your answers

Answer:

(i). Determine the color of Bob. BOB IS WHITE

(ii). Determine which color is dominant. BROWN IS DOMINANT

(iii). Work out the ratio of brown to white in the ‘grandchildren.’      

     PHENOTYPIC RATIO BROWN TO WHITE 3:1

(iv). If the researcher crosses two of the white 'grandchildren', determine the color of their  offspring. THE WHOLE PROGENY WILL BE WHITE

Explanation:

Due to technical problems, you will find the complete question, answer, and explanation in the attached files.

Download pdf
4 0
2 years ago
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