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vesna_86 [32]
3 years ago
6

Which two questions exemplify the scientific attitude?

Biology
1 answer:
zepelin [54]3 years ago
8 0
Research study related physical and physics elements
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Why does active transport require energy to move molecules of a substance across a cell membrane?
Fed [463]

Answer:

The substance moves from low to high concentration, against the concentration gradient.

Explanation:

When molecules move from high to low concentration, it is known as Diffusion. It moves with the concentration gradient and does not require energy.

However, when molecules move from low to high concentration, it is against the concentration gradient and cannot proceed without Energy. This process is called Active transport.

Cell membrane is not thick, it is thin and semi permeable.

7 0
3 years ago
The function of platelets is all of the following except:
Svetlanka [38]

Answer:

C

Explanation:

They does not carry oxygen to injured areas of tissue

4 0
3 years ago
In a hydra, digestion is completed _________.
OLEGan [10]

In a hydra, digestion is completed intracellularly.

Hence option (a) is correct.

Small, freshwater organisms of the phylum Cnidaria and class Hydrozoa are grouped under the genus Hydra. They are indigenous to temperate and tropical climates. 

The digestion takes place intracellularly in Hydra.

Because of their ability to regenerate and the fact that they don't appear to age or experience old age, hydra have drawn the attention of biologists.

Like most other cnidarians, hydras have a pretty straightforward digestive system.

They have a two-way digestive system, which differs from mammals in that food and waste enter and exit through the same aperture. A "blind gut" is the name for this configuration.

The center of the hydra's body is occupied by its digestive tract.

Learn more about Hydra here brainly.com/question/1808325

#SPJ4

7 0
1 year ago
the unicellular spores of the fern ceretopteris richardii are about 100 um in diameter.calculate the surface-area-to-volume rati
WINSTONCH [101]
The surface area will be:
S.A. = 6l²
S.A = 6(100 x 10⁻⁶)²

Volume = l³
Volume = (100 x 10⁻⁶)³

Surface area to volume ratio:
[6(100 x 10⁻⁶)²] / (100 x 10⁻⁶)³
S.A : Vol = 6 x 10⁴
4 0
3 years ago
What are the major reservoirs for water?
FromTheMoon [43]
Those would be oceans and lakes. Hope this helps and have a nice day!
8 0
3 years ago
Read 2 more answers
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