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FrozenT [24]
3 years ago
11

The bones in the front fins of whales and the bones in the human arm evolved from a common ancestor but carry out different func

tions. This is an example ofA. homologous structures.B. vestigial structures.C. embryonic structures.D. analogous structures.
Biology
1 answer:
Readme [11.4K]3 years ago
7 0

Answer:

Option A.

Explanation:

Analogous structures are similar structures that evolved independently in two living organisms to serve the same purpose.

Homologous structures are organs or skeletal elements of animals and organisms that, by virtue of their similarity, suggest their connection to a common ancestor. These structures do not have to look exactly the same, or have the same function

Vestigial structures no longer carry out any function.

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3. How do floods affect the environment? Select all that apply.
Tcecarenko [31]

Floods affect the environment by destroying building, creating areas of more fertile soil and speeding up the weathering of rock.

Answer: Option A,B & C

<u>Explanation:</u>

Floods obviously destroy every building on its way ruining the whole place taking away the lives of people and stock. But the flood also carries many nutrients along it’s way which creates areas of more fertile soil.

Unexpected floods enter into the holes of the rock and during winter it transforms into ice and causes crack in the rock. The flood water gushing fast normally breaks down the corners of the rock hence causing weathering of rock.

4 0
2 years ago
Explain why cells need to supercoil their dna molecules
Len [333]
DNA supercoiling means under or over winding of the DNA strand and basically is to become more condensed and more organized. Supercoiling is very important as it compacts the genetic code and as if that was not enough supercoiling also regulates and oversees the access the the genetic code.
5 0
3 years ago
The greater the speed of a gas particle is a container is it.
meriva
A. Greater the pressure
4 0
3 years ago
The reason that there are Okazaki fragments during DNA replication is ultimately because:
rusak2 [61]

Answer:

B) Polymerases can only synthesize in the 5' to 3' direction

Explanation:

The leading strand's directionality is 3' to 5', so polymerase has no problem with replicating this one. But the lagging strand has the opposite directionality, so the polymerase must work in the opposite direction of the replication fork.In consequence, the replication process undergoes periodic breaks, and the enzymes have to stop and start again while helicase separates both strands, resulting in the polymerization of okazaki fragments.

5 0
3 years ago
If a pin is .001 m wide how many red blood cells could you line up across a pin
tresset_1 [31]
According to the question, the width of a pin is 0.001m and the width of a red blood cell is 6-8 μm.
Width of pin in μm = 1000μm.
So approximately 1000/8 red blood cells can fit which is equal to 125 RBCs.

Answer: 125 RBCs
6 0
2 years ago
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