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⁞ Biology

General Science ➤ Biology ➤ 1
Question 11
Q11.  The male sex harmone is
 

Answer :  Testosterone


Male sex harmones are called androgens. The main androgen is testosterone, and an additional androgen is dihydrotestosterone. It plays a key role in the development of male reproductive tissues such as the testis and prostate as well as promoting secondary sexual characteristics such as increased muscle, bone mass, and the growth of body hair.
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Question 12
Q12.  Statement I : Complex tissue is made up of more than one type of cells.

Statement II : Meristems are examples of permanent tissue.
 

Answer :  Statement I is correct, but Statement II is incorrect.


A meristem is the tissue in most plants containing undifferentiated cells (meristematic cells), found in zones of the plant where growth can take place. Meristems give rise to permanent tissues.
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Question 13
Q13.  The newly hatched tadpole breaths through its
 

Answer :  External Gills


A tadpole resembles a fish and breaths through External Gills. Adult frogs breathe through their lungs and exchange gases through their skin and the lining of their mouths.
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Question 14
Q14.  The biological process in which both aerobes and anaerobes degrade organic matter is
 

Answer :  Composting


Composting is the decomposition of plant remains and other once-living materials to make an earthy, dark, crumbly substance that is excellent for enriching soil. It is the cheif way to recycle wastes.
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Question 15
Q15.  The cuticle is absent in
 

Answer :  Root


The epidermis of the stem and the leaf is usually surrounded by a thin covering called cuticle. It is formed by a waxy substance called cutin. It is meant for preventing excessive evaporation of water. Cuticle is absent in the root epidermis.
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