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3 years ago

Darwin’s theory of common descent states that all organisms _____.

Biology

2 answers:

Amanda [17]3 years ago

7 0

The right answer is evolved from past organisms

Darwin's theory is a theory about the evolution of species. According to him, the animal and vegetable species had to change to survive, adapting to the variations of their environment. Only those who survive to have descendants, this is called natural selection.

So evolution is a scientific theory that focuses on these species and explains the mechanisms of their appearance from existing or past species.

choli [55]3 years ago

6 0

The correct answer would be the last one: "evolved from past organisms." This theory basically just states that all living organisms evolved from a single common ancestor. Hope this helped! :)

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You are working in the lab looking at slides of bacteria and blood, which container should you dispose of the slides in after yo

Anestetic [448]

The container that should be used to dispose of slides of bacteria and blood is called a biohazard container.

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4 years ago

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Given the choice of 4 bases and the number of bases needed to make up a codon, how many possible codons are there? 16 23 64 128

Lilit [14]

Answer:

Explanation:

A codon is a group of three nucleotide sequence in a mRNA that specifies a particular amino acid acid. There are only four nucleotides composed of the four nitrogenous bases viz: Adenine, Guanine, Cytosine and Thymine/Uracil.

A codon is composed of only three of these nucleotide bases at a time. Hence, considering the number of nucleotide bases that can make up one codon and the 4 nucleotide bases, there can only be 4^3 = 64 combinations of the four nucleotides. This means that there are 64 possible codons.

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3 years ago

Fungal species are classified in a particular phylum based on __________.

notka56 [123]

the type of sexual structure they form

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3 years ago

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"What is true of the breakdown of polymers inside living cells?" A. It is energetically unfavorable. B. It is associated with a

jek_recluse [69]

Answer: B. It is associated with a negative change in free energy.

Explanation:

<u>A polymer is an organic compose made of many simple molecules </u>that are repeating structural units called monomers. Examples of polymers are DNA, lipids, carbohydrates and proteins.

Polymers are broken down into monomers in a process known as hydrolysis, which is a reaction that splits the bond between monomers. During these reactions, the polymer is broken into many components.

This process of breakdown is called catabolic reactions, which, as it was said, is the break down of larger molecules into smaller molecules through the hydrolysis of its bonds. <u>This reaction releases energy which was found in the bond between this monomers.</u> And, when energy is released, there is a negative change in free energy. This means there is more free energy available for the cell to be used.

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4 years ago

Think about the DNA coding sequence of a gene. If an A were swapped for a T, what kind of mutation could it cause and why?

sleet_krkn [62]

Answer:

The answer is D.

Explanation:

The given situation in the question where an Adenine nucleotide is swapped for a Thymine nucleotide, which as stated are complimentary of each other just like guanine and cytosine, can cause all three types of mutations, frameshift nonsense, frameshift missense and silent because the situation is not specific to either of them. There is no information whether the change resulted in a change in the amino acid structures or not. In this case the best answer is D.

I hope this answer helps.

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4 years ago