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Alchen [17]
3 years ago
7

Water absorbed by the roots moves through the stem and enters the leaves. Most of this water is lost in transpiration. Explain h

ow the internal structure of leaves results in the loss of large quantities of water in transpiration​
Biology
1 answer:
Nimfa-mama [501]3 years ago
6 0
In plants, the transpiration stream is the uninterrupted stream of water and solutes which is taken up by the roots and transported via the xylem to the leaves where it evaporates into the air/apoplast-interface of the substomatal cavity. It is driven by capillary action and in some plants by root pressure.
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Describe the four major steps of digestion, and discuss the organs involved in each.
andrezito [222]

nouth, oesophagus, stomach, duodenum, pancreas, ileum,colon, rectum,anus.

5 0
2 years ago
You have been studying a large lake ecosystem. You learn that toxins have been dumped into the water. You predict that the popul
Shtirlitz [24]

The correct answer is predatory birds.  

The flowing of toxic chemicals and heavy metals into the water body when the agricultural, industrial, and human wastes run off or are discharged intentionally into the water body is known as biomagnification. These pollutants result in genetic mutations, disease, reproductive difficulties, birth defects, death, and behavioral modifications in various marine species.  

However, the extremity of the destruction varies significantly among the species. In various circumstances, the animals close to the top of the food chain are most influenced by the procedure of biomagnification.  

Several of the harmful toxins get settle at the lower level in a water body and are then consumed by the species, which feed or live on the bottom dwellers. As these constituents are not digested, they gathered inside the bodies of the species, which consumes them.  

It signifies that the higher level predators, like fish, birds, or marine mammals accumulate more harmful concentrations of toxic substances in comparison to the animals lower on the food chain. Thus, in the given case, the more concentrated amount of toxins would be found in the predatory birds.  


8 0
3 years ago
Design an experiment to determine whether the pink flower of petunia plants results from incomplete dominance.
anzhelika [568]

Answer:

To cross petunia plants/lines with pink flowers (F1) which were obtained by crossing plants with red and white flowers (parental generation). The presence of petunia plants with red or white flowers in F2 would evidence that this trait is under incomplete dominance.

Explanation:

Incomplete dominance is a type of relationship in which both alleles are expressed in heterozygous individuals, thereby resulting in a new phenotype. This type of allelic interaction is commonly referred to as 'the dilution of the dominant allele' in heterozygous individuals. Moreover, codominance refers to a type of allele relationship in which both alleles are expressed to an equal degree in heterozygous individuals.

5 0
3 years ago
Precapillary sphincters will a. cause blood to flow directly from the metarteriole into the postcapillary venule. b. control blo
DanielleElmas [232]

Answer:

Option-E

Explanation:

Meta arteriole is a type of vessel present in the micro-circulatory pathway of the human body, which possesses characteristics of both the arteriole and the capillaries.

The structure of metarteriole usually connects the arteriole to the venules and they possess smooth muscle rings at the entrance of the vessel in the capillary and thus acts as a sphincter. This sphincter controls the flow of blood into the venules and capillaries.

The precapillary sphincters are usually closed but when the tissue needs the oxygen the sphincter opens and supplies the blood.

Thus, Option-E is correct.

3 0
4 years ago
An organelle found in most eukaryotic cells described as cellular power plants
vitfil [10]

Answer: Mitochondria

Explanation:

Mitochondria are the energy "transformer" of the cells. They change energy received through nutrients into a pattern that the cells can utilise for metabolism.

8 0
3 years ago
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