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pantera1 [17]
2 years ago
9

How does the transcription of structural genes in an inducible operon occur? (A) It occurs continuously in the cell. (B) It star

ts when the pathway's substrate is present. (C) It starts when the pathway's product is present. (D) It stops when the pathway's product is present.
Biology
1 answer:
-BARSIC- [3]2 years ago
3 0

The transcription of structural genes in an inducible operon occur (B) It starts when the pathway's substrate is present.

Inducible operon is the one which works only when the stimulus is received by an inducer, enhancer or a positive regulator. Inducible operon consists of one or more structural genes. The example of inducible operon is lac operon.

Substrate is a chemical substance upon which any enzyme acts. It is a starting material for any process to begin. In operons as well, substrate acts as an inducer for beginning the process of transcription. In lac operon, lactose itself acts as a substrate for the transcription of the m-RNA coding for enzyme β-galactosidase.

To know more about inducible operon, here

brainly.com/question/2562849

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Liverworts, like the ones shown here, are nonvascular plants. They do not grow tall. Explain how the tissues in liverworts affec
IgorC [24]

Answer: The tissue structure of the liverworts restricts them to a type of environment that affects their size.

Explanation:

Nonvascular plants, also called the Bryophytes in Kingdom Plantae, are simple plants that grow in damp places on land and as the name implies, are non vascular plants( that is, they lack vascular tissues). There are three types of nonvascular plants which includes:

--> Mosses

--> liverworts and

--> hornworts.

Liverworts are restricted to a particular size through the type of tissue they have ( non vascular) because it predisposes them to lack conducting vessels like the phloem and xylem found in vascular plants which aids in conducting water and food to various parts of the plants. Also they do not grow tall like the vascular plants because they lack the qualities that will enable them do so, such as roots, stems and leaves.

Nonvascular plants are low-growing, reproduce with spores, and need a moist or damp environment.

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3 years ago
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expeople1 [14]

Answer:

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4 0
4 years ago
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Answer:

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Environmental world view gives us an idea about our role in the environment and our activities that causes positive or negative effect on the environment and also understand how does the world does its function.

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