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Ksju [112]
2 years ago
10

Justin made a list of items from a book.

Biology
2 answers:
Olenka [21]2 years ago
6 0

Answer:

D Butterfly, coral and amoeba came from pre existing  cells  

Explanation:

sdas [7]2 years ago
5 0

Answer:

D

Explanation:

A pen and a lamp are non living things yes a lamp can use electricity to turn on so the best answer would be D because they are living things.

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The Gram stain technique is valuable in distinguishing Bacteria from viruses whether or not a bacterium has pili. The flagella o
erastova [34]

Answer:

False

Explanation:

Gram stain technique is a method use to classify bacteria into large groups base on their different cell wall components. It differentiate gram positive and gram negative by coloring them with red or Violet colors.

Gram stain is use for identification and classification of bacteria.

Gram positive stain violet due to presence of thick layers of peptidoglylcan in their cell walls and gram negative stain red due to thin layers of peptidoglylcan in their cell walls.

8 0
3 years ago
How does extracellular glucose inhibit transcription of the lac operon?
Genrish500 [490]

The extracellular glucose inhibit transcription of the lac operon (D) by reducing the levels of intracellular cAMP.

Lac operon is the assembly of various genes that are involved in the uptake and metabolism of lactose of E. coli or any other bacteria. It consists of a regulator gene, promoter gene, operator and structural gene. Structural genes are three: z, y and a. Each codes for a different enzyme.

cAMP is the cyclic Adenosine Monophosphate. It is produced by the bacteria when there are low levels of glucose in it. Hence it is also named as hunger signals. Therefore, cAMP is responsible for activating the operon to produce lactose.

To know more about cAMP, here

brainly.com/question/13794408

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3 0
2 years ago
How does the structure of the bronchial tree change as the bronchi become smaller?
insens350 [35]

The following structural changes occur as conducting tubes become smaller;

- support structures change. The trachea has more hyaline cartilage than the bronchioles

- epithelium type changes with bronchioles having ciliated columnar cells with the trachea having tall       columnar pseudostratified

- amount of smooth muscle increases as you go lower the respiratory tract


7 0
3 years ago
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Which statement explains the difference with the spiders living in the urban environment
Mars2501 [29]

Answer:

B

b

b

b

b

b

nb

b

bb

b

b

bb

bb

b

b

b

b

v

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v

3 0
3 years ago
What is socialisation?write its advantages<br>Happy Birthday jamila ​
Shkiper50 [21]

Answer:

Socialization is the process by which human begin to acquire the skills necessary to perform as a functioning member of their society.

It's advantages are:-

Mental Health.

Confidence and self-esteem. ...

Increased quality of life.

Reduced blood pressure.

Reduced risk of Alzheimer's.

Boost immunity and other physical health benefits.

Increased brain health.

Promotes purpose.

<h2>And Happy bithday jamila!!</h2>
3 0
2 years ago
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