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Arturiano [62]
3 years ago
8

Which of the following mutations could lead to constitutive expression of the genes of the lac operon?

Biology
1 answer:
alina1380 [7]3 years ago
8 0

the answer is A.

~hope this helped

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What two species are most closely related from the evolutionary tree
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Answer:

Species a and c

Explanation:

The species c, was more closely related to species a than species b was. This is because species a and c just recently evolved into different species in evolutionary history.

4 0
2 years ago
PLZ HELP!!!!!!!!!!!!!!! DUE TODAY!!!!!
inessss [21]

1.each of several hierarchical levels in an ecosystem, comprising organisms that share the same function in the food chain and the same nutritional relationship to the primary sources of energy.

A scavenger is an organism that mostly consumes decaying biomass, such as meat or rotting plant material. Many scavengers are a type of carnivore, which is an organism that eats meat. While most carnivores hunt and kill their prey, scavengers usually consume animals that have either died of natural causes or been killed by another carnivore.

Scavengers are a part of the food web, a description of which organisms eat which other organisms in the wild. Organisms in the food web are grouped into trophic, or nutritional, levels. There are three trophic levels. Autotrophs, organisms that produce their own food, are the first trophic level. These include plants and algae. Herbivores, or organisms that consume plants and other autotrophs, are the second trophic level. Scavengers, other carnivores, and omnivores, organisms that consume both plants and animals, are the third trophic level.

Nitrogen is converted from atmospheric nitrogen (N2) into usable forms, such as NO2-, in a process known as fixation. The majority of nitrogen is fixed by bacteria, most of which are symbiotic with plants. Recently fixed ammonia is then converted to biologically useful forms by specialized bacteria.

4 0
3 years ago
Are living and non living things made of the same ingredients?why or why not?
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Answer:

they are not made of the same ingredients

Explanation:

All living things breathe, eat, grow, move, reproduce and have senses. Non living things do not eat, grow, breathe, move and reproduce. They do not have senses.

6 0
3 years ago
Explain the function of the chloroplast.
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In particular, organelles called chloroplasts allow plants to capture the energy of the Sun in energy-rich molecules.

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Robert Hooke discovered cells by observing Cork with a homemade microscope.
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