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natka813 [3]
4 years ago
14

Why can humans not rely on the transport method used in small organisms

Biology
1 answer:
iragen [17]4 years ago
8 0
This is because human have a much larger surface area. Small organisms have a small surface area and thus simple diffusion meets their transport requirements. As the size of the organisms increases, its surface area to volume ratio decreases. This means it would take days for molecules to diffuse through a large animal, so humans have a circulatory system with a pump to transport materials quickly around their bodies. Therefore due to their large size, humans require a specialized transport system.
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Determine whether each phrase mainly describes surface ocean currents or deep ocean currents.
igomit [66]

Answer: This is What drives ocean currents

- Surface is primarily driven by wind (friction from wind transfers energy and momentum to surface water)

- Deep is slower, driven primarily by density (salinity and temperature) differences

- Thermocline: dramatic temp drop 50 m from surface bc sun can't shine

- Halocline: dramatic gradient in saline, increase as it deepens

- Pycnocline: resulting change in density (50-1000)

3 0
3 years ago
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olganol [36]
P= Prokaryotic and E= Eukaryotic

E) Does have a membrane bound nucleus.
P) DNA is free floating in the cell.
P) Bacteria is an example of this type of cell.
P) More organisms made of these cells are unicellular.
P) Does not have a membrane bound nucleus.
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E) All plants and animals are made up of this cell.
E) Most organisms made up of these cells are multicellular.
7 0
3 years ago
For a single-gene trait with alleles A and a, a certain mating produces offspring that are 1/4 AA : 1/2 Aa : 1/4 aa. What is the
Tasya [4]

Answer:

Random mating

Explanation:

Random mating is a type of mating that allows individual to have equal chance of been mated to.

AA genotye is mated with aa from a population and they produce

Four individuals with Aa

AA × aa

!

F1: Aa Aa Aa Aa

This individuals then intermate in the next generation to produce an offspring with three difference genotype AA, Aa, aa in ratio 1:2:1 this is called segregation of genes. This allow to see the variation and hidden features of the individual mated.

Aa × Aa

!

AA Aa Aa aa

F2: 1/4 AA, 1/2 Aa, 1/4 aa

3 0
3 years ago
Samuel adds a teaspoon of salt to glass of water he’s notices that the salt disappears. Samuel takes a sip to discover that the
galben [10]
This would be an example of a physical change. The salt is still salt, it just dissolved.
8 0
4 years ago
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What is the optimal soil pH for most plant growth? Why is this so?
Marta_Voda [28]

Answer:

B

Explanation:

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8 0
3 years ago
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