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marshall27 [118]
4 years ago
12

Why do birds have no urinary bladders?

Biology
1 answer:
Inga [223]4 years ago
5 0
Birds actually combine their solid and liquid waste into a white paste with varying amount of green/brown color. The white part is mainly comprised of uric acid and the green/brownish parts are comprised of fecal matter.

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Manny is using a computer model to investigate the effects of substitution mutations. The model presents Manny with a long base
Troyanec [42]

Answer:

The most likely explanation for the truncated polypeptide -due to the substitution of cytosine for adenine- is that mutation introduced a stop codon in the middle of the gene.

Explanation:

A codon consists of three nucleotides -in the RNA chain- whose order determines a specific amino acid. Not all codons code for amino acids, as there are termination codons, also called stop codons, which are UAG, UGA and UAA.

If in Manny's computer model, the substitution of cytosine by adenine produced a termination codon, the synthesis of a peptide is stopped prematurely resulting in a truncated peptide.

Learn more:

Stop codon brainly.com/question/6183177

5 0
3 years ago
The drug Viagra promotes blood vessel dilation by prolonging signaling through nitric oxide (NO). How does Viagra boost NO?
cricket20 [7]

Answer:

The correct answer is option d, that is, it prevents the enzyme, which degrades cyclic GMP.

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Oral therapy for erectile dysfunction is Viagra, which is the citrate salt of sildenafil, it works by preventing a specific phosphodiesterase type 5 or PDE5, which is the inhibitor of cGMP. During sexual stimulation, nitrous oxide is released in the corpus cavernosum causing the erection of the penis in males. The nitrous oxide then stimulates the enzyme guanylate cyclase that further makes the concentration of cGMP to elevate, this generates smooth muscle relaxation in the corpus cavernosum and permitting blood the inward flow of blood.

Viagra works by increasing the influence of nitric acid by preventing PDE5, which is accountable for the deprivation of cGMP in the corpus cavernosum. At the time of sexual stimulation, the discharging of nitrous oxide takes place, the viagra inhibits PDE5 causing the levels of cGMP to elevate in the corpus cavernosum leading to smooth muscle relaxation and continuous flow of blood to the corpus cavernosum.

4 0
3 years ago
Convergent faults ___.
gulaghasi [49]
Convergent faults on divergent boundary are composed of oceanic-continental tectonic plates which can form mountains and volcanoes. This happens when tectonic plates move away from one another creating new oceanic crust through sea-floor and spreading happens when tectonic plates stop moving.
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Answer:

what are the options for the answer

Explanation:

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Which part of the endomembrane system deals with toxins?
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