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cestrela7 [59]
2 years ago
12

ANSWER FOR BRAINLEST What layer is the oldest?

Biology
1 answer:
Phoenix [80]2 years ago
7 0

Answer:

B is oldest because it is at the bottom which entails that it is the oldest.

Explanation:

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The photo shows a boy and his parents.
stellarik [79]

Answer:

B

Explanation:

You can't change your DNA as far as I know and if you inherit exact copies of DNA from your parents that means you're a clone which human clones don't exist. You inherit genes from both your mother and father i.e you have blue eyes like your dad and brown hair like your mom.

5 0
3 years ago
You are given a 1 liter bacterial culture in exponential stage of growth. The generation time of the bacteria is known to be 30
nydimaria [60]

Answer:

Option-A

Explanation:

A bacteria divides by binary fission which divides a parent bacteria into the two daughter cells and generation time refers to the average time difference between two consecutive generations.

The bacterial cell grows by the exponential function that is by 2^{number of generation} x initial population of bacteria.

In the given question,

<u>Initial population</u>

the initial population of bacteria - 2x 10³ per ml

So per liter, the bacterial population will be 2 x 10 ⁶

<u>Generation time</u>

1 generation time of bacteria is 30 min.

so 5 hours will have- <u> </u>\frac{300}{30}= 10 generations

<u>New bacterial population</u>

Using formula<u>  </u>2^{number of generation} x initial population of bacteria

2^{10} x (2 x 10⁶)

= 1048 x (2 x 10⁶)

2048 x 10⁶

Thus, Option-A is the correct answer.

4 0
2 years ago
Does smoothness affect seed dispersal? Does it help it?
AlladinOne [14]

Answer:no se queda igual

Explanation:

4 0
3 years ago
To grow, plant cells must produce new components of the cell membrane, including phospholipids and membrane proteins. Components
Makovka662 [10]

Answer:

endoplasmic reticulum

Explanation:

ER is full with proteins than help to synthesize phospholipids in plant cells

4 0
2 years ago
In 1958, Meselson and Stahl conducted an experiment to determine which of the three proposed methods of DNA replication was corr
Katen [24]
<h2>Meselson and Stahl conducted an experiment to determine the correct proposed methods of DNA replication was semi-conservative. the three proposed models for DNA replication are semi-conservative, conservative, and dispersive.</h2>

Explanation:

In Semi-conservative replication model, the two strands of DNA uncoil from each other. It perform with the original strand and a new strand.

In Conservative replication model, DNA replication didn't open at all, but the parent strands remains undamaged by creating a new and separate  molecule that consists of two new strands.

In Dispersive replication model, DNA replication results in two DNA molecules that consists of both parental and daughter DNA.

He demonstrated that semi-conservative DNA replication is an universal mechanism allocated by all organisms on Earth.

4 0
3 years ago
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