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Burka [1]
3 years ago
7

Which mode of drinking water has the most negative impact on the environment

Biology
1 answer:
valentinak56 [21]3 years ago
5 0
Bottled water because people throw the empty bottles on the ground and animals get caught in it and hurt themselves or they mistake it as food and they eventually fill up their stomachs with it and they cant eat or drink anything to survive
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How do producers create energy for survival?
zhenek [66]

Answer:

A

Explanation:

4 0
3 years ago
Read 2 more answers
Chargaff's rule states that the amounts of guanine and cytosine are roughly the same, and the amounts of adenine and thymine are
Mazyrski [523]

Answer:

True.

Explanation:

The Chargaff's rules indicate that in the DNA of all living organisms the amount of adenine (A) should be equal to the amount of thymine (T), while the amount of guanine (G) should be equal to the amount of cytosine (C). These rules were useful to describe the structure of  the double helix and also enable to describe base patterns that often are associated with specific gene regions (for example, promoter regions are rich in AT). Moreover, an imbalance in the 1:1 equilibrium ratio is associated with mutations that may cause diseases such as cancer.

8 0
3 years ago
Barred feather pattern is a Z-linked dominant trait in chickens. What offspring would you expect from (a) the cross of a barred
Bezzdna [24]

Answer:

Let the "barred" allele be caller B and the "non-white" allele b. Since chickens use chromosomes Z  and W to determine sex, hens would have chromosomes ZW, and roosters would have chromosomes ZZ. A Z-linked gene is represented as a superscript on the Z chromosome, Z^{B} for the dominant allele and Z^{b} for the ressesive allele.

A barred hen would have a copy of B on its Z chromosome, a non-barred rooster would have both copies of b on both Z chromosomes. Using Punnet squares to represent the crosses we get the following cases:

\begin{center}\begin{tabular}{ |c|c|c|c| }\ & Z^{B} & W \\ \ Z^{b} & Z^{B}Z^{b} & Z^{b}W \\ \ Z^{b} & Z^{B}Z^{b} & Z^{b}W \\ \end{tabular}\end{center}

That is a ratio of two barred heterozygote roosters to two non-barred hens. Crossing them we get:

\begin{center}\begin{tabular}{ |c|c|c|c| }\ & Z^{b} & W \\ \ Z^{B} & Z^{B}Z^{b} & Z^{B}W \\ \ Z^{b} & Z^{b}Z^{b} & Z^{b}W \\ \end{tabular}\end{center}

That is a ratio of one barred heterozygote rooster to one barred hen to one non-barred rooster to one non barred hen.

6 0
3 years ago
Circle the letter of each sentence that is true about carbohydrates.
irina [24]
A, b , and c are true. The monomer of sugar polymers is monosaccharides
7 0
2 years ago
Explain why rabbits are more destructive in Australia than in the U.S.?
Dmitrij [34]
There are no natural predators of rabbits in Australia, so they are able to reproduce at an alarming rate unharmed. In the US however, there are foxes and other animals that prey on rabbits, which helps keep the rabbit population lower.
3 0
2 years ago
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