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Ilya [14]
3 years ago
5

Hydrocarbons are a by-product of

Biology
1 answer:
maxonik [38]3 years ago
3 0

Answer:

B. Burning of Fossil Fuel!!

I guess....

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Enzymes work only on a single substrate, in most cases true or false
Alexxx [7]
That is true, enzymes are specific.
6 0
3 years ago
Read 2 more answers
Help please ASAP I need this answer
emmainna [20.7K]

Answer:

a: metaphase

Explanation:

the chromosomes are aligned at the metaphase plate

3 0
3 years ago
In the trp operon, attenuation occurs through the recognition of two tryptophan codons in the leader sequence. what would happen
Sati [7]
If a lot of tryptophan is present, the operon will be repressed.
Under intermediate amounts of tryptophan, the change to stop codons would cause the ribosome to stall and therefore would mimic as if there were no tryptophan present.
If no tryptophan present, the operon would be maximally expressed.

a - True. The ribosome would always be stalled in the leader sequence - so this wouldn't matter. However, the operon would still be transcribed because the repressor would be active (remember Trp operon is controlled both by attenuation and repression). True as long as there's not much tryptophan to activate the repressor!
b- True - With no tryptophan the repressor isn't engaged and the ribosome is stalled in the leader sequence.
c- Matters about how much tryptophan is available. So True if there's lots of tryptophan available.
d- I would choose this one as all of the above could be true depending on the levels of tryptophan.

4 0
3 years ago
Bob put a frozen fish on the stage of a dissecting scope because he wanted to observe the cells in the fish’s eye. Bob saw nothi
butalik [34]

Answer:

His process is wrong.

Explanation:

Bob must take the eye out of the fish. Then he must cut the eye. After he cuts the eye he needs to take a thin layer of the eye and put it on the glass. A microscope needs light to shine through the specimen. All Bob would see when he put the fish on there would be black. The thick amount of mass is blocking the light.

5 0
3 years ago
Two plants differ in the seed color they produce. One plant produces green seeds, the other produces yellow seeds. Yellow is the
Akimi4 [234]

Answer:

Genotype: 100% or 4/4 of the progeny will be heterozygous for the trait, Yy.

Explanation:

<u>Available data:</u>

  • Two plants differ in the seed color they produce.
  • One plant produces green seeds, the other produces yellow seeds.
  • Yellow is the dominant phenotype, over green which is the recessive phenotype
  • The parental plants are true-breeding

Let us say that the allele Y expresses yellow color and is dominant over the allele y which expresses the green color and in the recessive one.

Cross: a green-seeded plant with a yellow-seeded plant

Parental)                 YY             x             yy

Phenotype)   Yellow seeds            Green seeds

Gametes)           Y      Y                        y        y

Punnet square)      Y            Y

                     y       Yy            Yy

                     y        Yy            Yy

F1) Phenotype: 100% of the progeny will be yellow-seeded

  Genotype: 100% or 4/4 of the progeny will be heterozygous for the trait

7 0
3 years ago
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