Answer:
Melanin is responsible for black colour of hair.
Explanation:
Hair is black in colour because it is determined by the amount of a pigment present in hair is called melanin. If eumelanin which is a type of melanin, present in hair, it gives people black or brown hair. If the receptor is not activated or is blocked in the hair, then melanocytes make pheomelanin instead of eumelanin and then the black or brown hair colour did not occurs so we can conclude that melanin is responsible for black colour of hair.
Plasmodium is a monocellular parasite causing malaria to humans. The parasite's life cycle always includes two hosts, an insect host and a vertebrate host. The parasite's cells are injected into the vertebrate's (human in our case) bloodstream by the insect host (mosquito). There are several stages in its life cycle but the sexual reproduction occurs only in the insect. In the insect, gametocytes (haploid gametes) merge and form a zygote which in turn becomes an oocyst. Oocysts divide multiple times and that way a great number of sporozoites is produced. These sporozoites travel to the salivary gland of the mosquito and are injected into the bloodstream of the second host, the human. In humans, sporozoites infect liver cells and red blood cells.
According to this information, the four statements about Plasmodium which are true are:
-Plasmodium cells are transferred to human cells through mosquito saliva.
-The complete life cycle of Plasmodium requires two hosts.
-Plasmodium cells infect two specific types of cells in humans.
- Inside an infected mosquito haploid gametes fuse, forming a haploid zygote that develops into an oocyst.
The correct matching of the given terms are as follows;
Adhesion - the ability of two substances to stick together.
Thermal energy - is the random motion of molecules.
Surface tension - is a measure of how difficult it is to break the surface of a liquid.
Evaporation - is the cooling of a surface due to a substance changing from a liquid to a gas.
Temperature - is the average speed of molecules moving within matter.
<h3>What is are the definition of the given terms?</h3>
The definition of the given terms are as follows;
Adhesion is defined as the attractive force which exists between two different molecules which cause them to stick together.
Thermal energy is the random motion of molecules.
Surface tension is a measure of how difficult it is to break the surface of a liquid.
Evaporation is the cooling of a surface due to a substance changing from a liquid to a gas.
Temperature is the average speed of molecules moving within matter.
In conclusion, adhesion involves the attraction between molecules of different substances.
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