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Furkat [3]
3 years ago
14

The __________ valve prevents backward flow of blood into the left ventricle.

Biology
1 answer:
GuDViN [60]3 years ago
4 0
The aortic valve prevents backward flow of blood into the left ventricle.
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Which is most likely a covalent compound?<br><br> A.LiF<br> B.MgS<br> C.NH3<br> D.CaCl2
yKpoI14uk [10]
NH3 since they are both non metals
Answer:C
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2 years ago
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Enzymes are biological catalysts. Explain what they do in living systems
Marizza181 [45]

An enzyme lowers the activation energy of a reaction so it can take place within living organism, so an enzyme is a biological catalyst.

7 0
2 years ago
Which statements describe the inheritance of traits? Select three options.
liraira [26]

Answer:

<u><em>The correct options are:</em></u>

<u><em>All traits are inherited.</em></u>

<u><em>Offspring inherit one allele for a gene from each parent.</em></u>

<u><em>An offspring with two identical alleles for a trait is homozygous.</em></u>

Explanation:

  • In the biological world, a trait can be described as a genetic characteristic which makes up an organism. Every organism has a particular set of traits.

  • Traits are inherited from parents, however they can be influenced by the environment.

  • The alleles of a gene make up the genotype and the influencing phenotype. An organism acquires one allele for the gene pair from each parent.

  • When both the alleles of a gene pair are similar, the organism is said to be homozygous for the trait. If both the alleles of a gene pair are different, the organism is said to be heterozygous for the trait.

3 0
2 years ago
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Protein synthesis consumes four high-energy phosphate bonds per added amino acid. Transcription consumes two high energy phospha
SVEN [57.7K]

Answer:

30 protein molecules per mRNA molecule

Explanation:

In this problem, it is necessary to have into account that the transcriptional process requires six (6) phosphate bonds to synthesize one (1) codon (i.e, each three nucleotides), and also discards 95% more energy to make mRNA, it means 19 times this amount of energy >> 6 x 19 = 114 bonds. In consequence, transcription requires 120 phosphate bonds (6 + 114 = 120), while translation requires four (4) phosphate bonds per codon. From this deduction, it is possible to find the number of protein molecules synthesized with regard to the energy cost of the translation process and the transcriptional process >>> 120 bonds (transcription) /4 bonds (translation) = 30 protein molecules.

7 0
3 years ago
What are the two species of penguin are we likely to see on the third day?
Nesterboy [21]
They will be <span>Gentoo and Magellanic penguins.</span>
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3 years ago
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