Answer:
The correct answer is statement A.
Explanation:
The procedure of purifying ocean water, that is, the saline water so that it can become suitable for drinking is termed as desalination. Almost 70 percent of the Earth is covered with water and of this only 3 percent is used for drinking purposes. On a huge scale, the process of desalination would require the boiling of water, which would eventually require an enormous amount of energy.
Reverse osmosis and electro-dialysis are the methods used for desalination. However, these procedures are very costly and cannot be performed on a huge level as it can affect the economy of various countries.
Characteristics of Lancelets:
Small
Elongated
Marine invertebrate
Lacks a jaw
No sense organs
Has a notochord
Example: Lamprey
Characteristics of Tunicates:
Marine invertebrate
Has an outer coat that is rubbery or hard
Has two siphons
Examples: sea squirts, salps
I hope this is the answer that you were looking for.
B I think cause your lifting something up?
Answer:
Hydrogen, Lithium, Aluminum, Argon, Nickel, Iodine, Gold, Mercury
Explanation:
Hydrogen has 1 proton.
Lithium has 3 protons.
Aluminum has 13 protons.
Argon has 18 protons.
Nickel has 28 protons.
Iodine has 53 protons.
Gold has 79 protons.
Mercury has 80 protons.
Hope this helps.
Yes, crossing over does not occur during mitosis. As mitosis is simply the duplication of cells, there is no gene variation that comes from crossing-over.
