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2 years ago

What is the first step in a scientific investigation?

2 answers:

8 0

Answer: I think a because without asking question how are u gonna know what u gonna do? Then u do reserch of the question and the c and final and b

Explanation:

harina [27]2 years ago

5 0

Answer:

a.asking questions. .......

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Which of the following personal health practices should a person follow to prevent obesity? A) Limit spending time outdoors in s

Ne4ueva [31]

B, have a balanced diet and exercise regularly

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3 years ago

Read 2 more answers

The trp and lac operons are regulated in various ways. How do bacteria regulate transcription of these operons? Sort the stateme

OLEGan [10]

Answer:

Operon is not transcribed:

-lac operon: lactose absent

-trp operon: tryptophan present

Operon is transcribed, but not sped up through positive control:

-lac operon: lactose and glucose present

-trp operon: tryptophan absent

Operon is transcribed quickly through positive control:

-lac operon: lactose present, glucose not

Explanation:

The trp operon is controlled via negative control only.

Presence of tryptophan will inhibit the transcription of the operon genes

The lac operon is controlled via negative control and positive control.

●Negative control:

--Transcription is turned off due to

active Repressor protein and absence of lactose

--Transcription is turned on due to

Inactive Repressor protein and presence of lactose

●Positive control:

--Transcription rate is higher due to absence of transcription and presence of lactose as a regulatory protein (CAP) adhere to the lac operon promoter

8 0

3 years ago

Which of the these do plants NOT obtain using Active transport?

zhannawk [14.2K]

Answer:

answer: carbon dioxide

6 0

3 years ago

Read 2 more answers

A pine forest on the coast is destroyed by a tsunami. After the tsunami small plants began to grow followed by some small trees

SCORPION-xisa [38]

Answer:

Secondary succession has happened.

Explanation:

secondary succession is the ecological succession that occurs after the initial succession has been disrupted and some plants and animals still exist. It is usually faster than primary succession

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3 years ago

Use the following graph of two theoretical populations (species A and B) to answer the following questions:

avanturin [10]

A) This is predator-prey relationship.

B) Species A is prey and species B is predator.
- If prey population decreases in number, the predator population will also decrease because there is not enough food for predators to survive and vice versa.

- If predator population decreases, the prey population will increase because less prey will be eaten by predators and vice versa.

C) Let population A be Zebras, and population B Lions.

From the graph, at the beginning the there is increase in Lions, as well as in smaller rate in Zebras. At one point, the population of Lions begins to decrease, so they will eat less Zebras. This will allow Zebras to increase population. With more Zebras on the menu, more Lions will eat and increase their chance to survive. This leads to decrease in Zebra population. But again, with less Zebras, the Lion population must decrease allowing Zebra population to increase, and so on.

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3 years ago