Answer:
i am not really sure if you meant how manyhours or is it longeror shorter to make full orbit.
Explanation:
The B cells are not considered as first line defense structures of the immune’s system
Answer: Option C
<u>Explanation:</u>
Our body is protected internally by nature by many layers of defense. Any microbe or a foreign material that disturbs the body is defended by these barriers.
The first layer of defense required physical and chemical barrier such as the skin, mucous membrane, tears, saliva etc . The second line defense system involves the cells and the tissues that protect the body.
Heterosporous <span>is a condition in which plants produce separate male and female gametophytes.</span>