They are most related to damselflies.
The answer is <u>High </u><u>Mountain</u> <span />
<span>Villi increases surface area for absorption as it contains lacteal which absorbs glycogen and fatty acids. blood capillaries in villi absorbs amino acids and glucose and then send them in the liver</span>
The answer would be: relatively constant environmental conditions
When the environment condition is changed, the organism need to changes too. If the organism reproduced asexually, their genetic material of the offspring would be identical without change. This makes asexual reproduction couldn't produce a different offspring.
Sexual production will produce a various genetic material that might turn the changes into beneficial condition.
So that the pressure will be at constant. If the water level will have raised up in the graduated tube directly above the water level in the burets and levelling funnels, the pressure on the trapped gas is no longer at usual atmospheric pressure. It produces a tapping effect on the locked in gas therefore dropping the pressure. If the burets and levelling funnels will be dropped below water level the reverse effect is produced.