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Alex_Xolod [135]
3 years ago
5

What happens to the expression of the lacI gene if lactose is not available in the cell? View Available Hint(s)

Biology
1 answer:
olchik [2.2K]3 years ago
3 0

Answer:

There is no change, the lac l gene is constitutively expressed, regardless of the presence of lactose.

Explanation:

Lacl gene codes for the lac repressor hence is always expressed to produce lac repressors which may or may not be bounded dependent on the presence of lactose. Lacl gene expression is not regulated, thus is constitutively expressed.

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Upon examining samples of water and mud from a nearby river, you come across an unidentified organism. The organism is unicellul
Tasya [4]

Answer:

A protist

Explanation:

In the given question, the characteristic of an unidentified organism are given which are:

1. The organism is unicellular and autotrophic which means that it is a producer and belongs to a plant like organism.

2. The membrane bound nucleus means that the organism is an eukaryote.

The organism is thus an unicellular, autotrophic and an eukaryote could be a species of algae which is considered a protist. The protists are the organisms which shows characteristic of the ukaryotes but are not considered true plants and animals.

Thus, a protist is correct answer.

3 0
3 years ago
How can Animal cell divide without centrioles?
sleet_krkn [62]

Answer:

An animal cell is not able to divide without a centriole

Explanation:

If animal cells lacked centrioles, they would not be able to divide. Centrioles have an important role in cell...

Hope this helps! Brainliest?? Anyways have a great day my loves <3

3 0
2 years ago
Use your knowledge of inheritance (the passing of traits from parents to offspring) to explain why
yarga [219]

Answer:

Fraternal twins can be different genders because they are two completely different eggs getting fertilized; but even two same gender fraternal twins do not look completely alike. Whereas for identical twins since one egg is splitting into two, the two cells have the same exact DNA make up and chromosomes.

I also believe the technical part of it is to do with genetics, like ressesive and dominant genes, because they can be the same gender, ex. both girls and one has blue eyes, fair skin, and blonde hair, the other twin has brown eyes, black hair and tan skin. The parents could be part of the genes but there is also grandparents maybe the mom's mom has blonde hair and blue eyes, with fair skin. But the dad he has brown eyes, black hair and tan skin. The moms genes were recessive, but the grandma's genes were dominant.

I tried to explain it as best as I could I hope it helps!

4 0
3 years ago
Muscle contraction that results in a change in joint angle is called
Alex_Xolod [135]
Muscle contraction that results in a change in joint angle is called <span>concentric contraction.
This contraction occurs when enough force that can overcome the resistance applied is developed by the muscle where this force developed is larger than the force of the resistance applied.</span>
6 0
3 years ago
Energy
andreyandreev [35.5K]

Answer:

A

Explanation:

Geothermal power plants, which use heat from deep inside the Earth to generate steam to make electricity.

3 0
3 years ago
Read 2 more answers
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