Answer:
Option (C).
Explanation:
Sex linked disorder may be defined as the disorders that are caused by the mutation or defects in the sex chromosome. Two main types of sex linked disorder are sex linked recessive and sex linked dominant.
Hemophilia is caused due to the defect in the clotting factor. This is a sex linked recessive disorder that are transferred from female to their sons. The hemophilic father has only one X chromosome and they will transfer this affected X chromosome to their daughters and none of their sons. Since, sons receive Y chromosome from their father.
Thus, the correct answer is option (C).
Answer:
Parasitism.
Explanation:
A biological interaction explains the different relationship between the organism and their interaction in the environment. The different biological interaction are mutualism, ammensalism and parasitism.
Parasitism may be defined as the type of symbiotic relationship in which the organisms are associated with each other. The one species gets benefit from the other organism while the other organism is harmed but they are ot killed directly or immediately. This is a type of negative interaction.
Thus, the answer is parasitism.
b. elevation
c. proximity to water
d. air and water currents
Answer:
An exoskeleton.
Explanation:
Tough outer shell of many insects is known as exoskeleton that represents an external skeleton. The exoskeleton provides protection and support to the insects body as they lack an internal skeletal system as higher organisms. In insects, it is made up of chitin.
Exoskeleton also plays role in sensing, feeding, excretion, and protection against desiccation in land insects.
Thus, the correct word to be filled in the blank is 'exoskeleton.'
b. organ.
c. tissue.
d. cell. User: Which of the following is an example of epithelial tissue?
a. bone
b. skin
c. fat
d. muscle User: The excretory system consists of which of the following organs?
a. stomach, liver, pancreas
b. lungs, nose, trachea
c. kidneys, ureters, urinary bladder
d. brain, spinal cord, sense organs