31. Which does not act as a protective barrier for the surface of the body?
[A] Skin
[B] Mucus
[C] Gastric acid
[D] Salivary amylase
Show Answer
Correct Answer: D [Salivary amylase]
Notes:
Salivary amylase does not act as a protective barrier for the surface of the body.
32. It filters your blood, and the tube returns essential substances to your blood and removes waste, called __
[A] Secretion
[B] Tubular Reabsorption
[C] Glomerular Filtration
[D] None of these
Show Answer
Correct Answer: C [Glomerular Filtration]
Notes:
Glomerular Filtration filters your blood, and the tube returns essential substances to your blood and removes waste.
33. Where do most of the digestive processes take place?
[A] Small intestine
[B] Large intestine
[C] Esophagus
[D] Rectum
Show Answer
Correct Answer: A [Small intestine]
Notes:
Most of the digestive processes take place in the Small intestine. The digestive system includes the mouth, pharynx (throat), esophagus, stomach, small intestine, large intestine, rectum, and anus. It also contains the salivary glands, liver, gallbladder, and pancreas, which make digestive juices and enzymes that help the body digest food and liquids.
34. Which of the following helps to protect the stomach wall from its secretion of hydrochloric acid?
[A] Pepsin
[B] Trypsin
[C] Amylase
[D] Mucus
Show Answer
Correct Answer: D [Mucus]
Notes:
Mucus helps to protect the stomach wall from its secretion of hydrochloric acid.
35. Where does the body of the stomach lie between?
[A] Fundus and pyloric antrum
[B] Pyloric antrum and cardia
[C] Cardia and fundus
[D] Cardia and antrum
Show Answer
Correct Answer: A [Fundus and pyloric antrum]
Notes:
In Body, the stomach lies between Fundus and pyloric antrum.
36. Which gland is located on both sides of the Trachea?
[A] Thymus
[B] Thyroid
[C] Adrenal
[D] Pineal
Show Answer
Correct Answer: B [Thyroid]
Notes:
The thyroid gland has two lobes, one on each side of the trachea, just below the larynx or voice box. The two lobes are connected by a narrow band of tissue called the isthmus. Internally, the gland contains follicles, which are responsible for producing the hormones thyroxine and triiodothyronine.
37. What is fertilization?
[A] Release of egg from the ovary
[B] Release of sperm from testis
[C] Mixing of semen with vaginal fluid
[D] Fusion of sperm with egg nuclei
Show Answer
Correct Answer: D [Fusion of sperm with egg nuclei]
Notes:
The release of an egg from the ovary is called Ovulation. Sperm is the release of sperm from the testis. Conception is the release of semen into the vagina. Fertilization is the process that leads to the fusion of male and female gametes.
38. The biofertilizer present in the roots of legumes is __
[A] Anabaena
[B] Rhizobium
[C] Azospirillum
[D] All of the above
Show Answer
Correct Answer: B [Rhizobium]
Notes:
Rhizobium leguminocerium bacteria live symbiotically in the root nodules of legumes and some non-legumes. They fix atmospheric N2 and hence increase soil fertility.
39. Green Revolution related to which of the following?
[A] Milk
[B] Agriculture
[C] Water
[D] Animals
Show Answer
Correct Answer: B [Agriculture]
Notes:
Green Revolution related to Agriculture. It took place between 1950-1960 and focused mainly on increasing agricultural production and started in Mexico.
40. Epidermal cells of which part of plant often secrete a waxy water resistant layer on their outer surface?
[A] Aerial parts only
[B] Roots only
[C] Both aerial parts and roots
[D] Neither aerial parts nor roots
Show Answer
Correct Answer: A [Aerial parts only]
Notes:
The major role of epidermis is to protect all the parts of the plant. Epidermal cells on the aerial parts of the plant often secrete a waxy, water-resistant layer on their outer surface. This aids in protection against loss of water, mechanical injury and invasion by parasitic fungi.
