Answer:

The correct option is b (false).

Explanation:

As is is cleared from the figure that when lactose is absent, the lac repressor binds tightly to the operator. It gets in RNA polymerase's way and prevent transcription.

8 0

2 years ago

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monica and andre are investigating The difference between physical and chemical change they list their observations in the table

velikii [3]

phsical change is a change of matter in which no new substance is formed but in chemical change new substance are formed

6 0

2 years ago

In human cells, this organelle houses 23 pairs of chromosomes which contain genes made from DNA; in each chromosome pair, one is

Anna11 [10]

Answer:

Nucleus

Explanation:

Humans are eukaryotic organisms. Their cells have a well-defined nucleus in which the genetic material is present in the form of chromosomes. Chromosomes have genes arranged in a linear manner. Genes represent the stretch of DNA that code for a specific protein. Being diploid organisms, humans have two complete sets of chromosomes. Therefore, each chromosome is present in pairs. These pairs are called homologous chromosomes. One chromosome of a pair comes from an egg cell and is called the maternal chromosome. The other chromosome is contributed by sperm and is called a paternal chromosome.

7 0

2 years ago

A large flock of endemic birds is discovered on a remote island. There appears to be two similar but different kinds of birds wi

den301095 [7]

Answer:

Option C

Explanation:

There are cases when two organism of different species mate to produce offspring but that offspring is unable to reproduce further. Hence, such organisms do not belong to the same species. Thus, Option D is incorrect

However, when two organisms are able to reproduce viable offspring, they are said to be of the same species. Such organisms are also similar in looks.

Hence, option C is correct

5 0

3 years ago