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Lina20 [59]
3 years ago
13

What happens to E. coli when lactose is not present?

Biology
2 answers:
victus00 [196]3 years ago
5 0
The correct answer is b
lakkis [162]3 years ago
4 0

<h3>The answer is B.</h3>

<em>The genes that produce the enzymes needed to break down lactose are not expressed.</em>

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How is the enzyme ligase beneficial in genetic engineering?
devlian [24]
The name comes from a latin word meaning to glue or bind together. DNA ligase catalyses the joining of DNA fragments (usually those produced by restriction enzymes). Thus different genes can be put into vectors and moved into other hosts.
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What process does a multicellular organism use to replace its damaged body cells? A. Transcription B. Translation C. Mitosis D.
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C. Mitosis, 
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Read 2 more answers
Which two (2) statements are correct examples of the “structure determines function” relationship among specialized cells in an
Nady [450]

Answer:

A and E are the correct.

Explanation:

Examples of the structures that determine function:

a) <u>Chloroplasts </u>only found in plant cells. They work to fix the CO2 in the presence of <u>light energy</u> (sunlight) and convert the reactants into <u>sugar molecules (carbohydrates</u>) that can be used by cells for metabolic functioning.

e) <u>Sperm</u> is the male reproductive cell. Motile sperm cells have a tail-like structure that typically <u>move via flagella</u> and requires a water medium in order to swim toward the egg <u>for fertilization</u>.

Other options are not correct because <u>they don't explain their function according to their structure</u>.

6 0
3 years ago
Forming a hypothesis is the first step of the scientific method.
exis [7]

Answer:

The first step in the Scientific Method is to make objective observations. These observations are based on specific events that have already happened and can be verified by others as true or false. Step 2. Form a hypothesis.

Explanation:

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3 years ago
Structure such as the human tailbone or appendix that evolution has reduced in size because it is no longer used 2. study of the
yarga [219]
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3. structure that is similar in related organisms because it was inherited from a common ancestor: = c. homologous structure

4. study of the similarities and differences in the embryos of different species: study of the similarities and differences in the embryos of different species = j. comparative embryology

5. scientist who finds and studies fossils to learn about evolution and understand the past:
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6. mistaken idea of jean baptiste lamarck that evolution occurs through the inheritance of traits that an organism develops in its own lifetime: = h. inheritance of acquired characteristics

7. process by which a single species evolves into many new species to fill available niches:
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8. relative ability of an organism to survive and produce fertile offspring: = k. fitness

9. structure that is similar in unrelated organisms because it evolved to do the same job, not because it was inherited from a common ancestor: = f. analogous structure

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11. process in which organisms evolve traits useful to humans because people select which individuals are allowed to reproduce and pass on their genes to successive generations:
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