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3 years ago

HELP ME PLASEEE I BEG U

Biology

2 answers:

Alla [95]3 years ago

8 0

Answer:

I'm pretty sure its B not 100% sure but i think it is only one that makes since to me

Explanation:

Luba_88 [7]3 years ago

7 0

you can also wait onsomebody else if you don't belive me

You might be interested in

Lab Report

andrew11 [14]

Answer:

Stimuli is when an living organism responds back to what ha happened.

Explanation:

3 0

3 years ago

National goals such as those from Healthy People 2010 and the Centers for Disease Control and Prevention (CDC) encourage curricu

goldenfox [79]

Answer: 16.7%

Explanation: Children and adolescents (ages 6 to 17 years) engage in 60 minutes or more of moderate-to-vigorous physical activity daily as described by the CDC in The Physical Activity Guidelines for Americans (second edition).

However, elementary and high schools usually run from 8 a.m to 3 pm (or 3.30pm in some cases) daily. High school students take six one-hour classes or four 90-minute classes and an hour lunch break daily.

Thus, the CDC recommends 60minutes of physical activities daily, which account to 16.7% of the total class duration (6 hours) per day.

4 0

3 years ago

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

In a marine ecosystem, starfish prey upon the common mussel. Common mussels feed upon plankton. What is MOST likely to happen if

Kay [80]

The answer is;

The numbers of mussels would reduce

Planktons population would increase.

This is a phenomenon common in food chains where a reduction in predator population increases the prey population and vice versa. This is because the species population in a food chain/food web are interlinked and source energy from one another directly or indirectly.

5 0

3 years ago

Which order of diagrams would show primary succession in an area that had never before been occupied by living organisms?

shtirl [24]

I believe the question is according to the attached image.
The order of the diagram that would show primary succession in an area that had never before been occupied by living organisms is;
C,A, B, D.
Primary succession occurs in lifeless areas; these are regions in which soil is incapable of sustaining life as a result of factors such as lava flow, newly formed sand dunes, or rocks left from a retreating glacier.

4 0

3 years ago