31. Which of the following part of the brain processes smell?
[A] Olfactory cortex
[B] Amygdala
[C] Olfactory bulb
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
The olfactory cortex, Amygdala, and Olfactory bulb are parts of the brain processes smell.
1. Olfactory Cortex is the portion of the cerebral cortex concerned with the sense of smell.
2. The amygdala is processing fearful and threatening stimuli.
3. The olfactory bulbs receive information about odors from the nose and send it to the brain via the olfactory tract.
32. Which of the following is an incorrect description of the human kidney?
[A] Blood enters the kidneys through renal veins.
[B] The kidneys are located on either side of the backbone.
[C] The waste products from the kidneys leave through the ureters
[D] None of these
Show Answer
Correct Answer: A [Blood enters the kidneys through renal veins.]
Notes:
Blood flows into your kidneys through the renal artery and exits through the renal vein.
33. A series of wave-like muscle contractions that move food through the digestive tract called __
[A] Abduction movement
[B] Peristaltic movement
[C] Adduction movement
[D] Protraction movement
Show Answer
Correct Answer: B [Peristaltic movement]
Notes:
A series of wave-like muscle contractions that move food through the digestive tract is called Peristaltic movement.
34. What are the examples of circadian rhythms in humans?
[A] the sleep-wake cycle
[B] the body-temperature cycle
[C] the cycles in which a number of hormones are secreted
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
The sleep-wake cycle, the body–temperature cycle, and the cycle in which many hormones are secreted are examples of circadian rhythms in humans.
35. Malaria is an acute febrile illness caused by__.
[A] Salmonella typhi
[B] Mycobacterium
[C] Plasmodium parasites
[D] Bordetella pertussis
Show Answer
Correct Answer: C [Plasmodium parasites]
Notes:
Malaria is an acute febrile illness caused by Plasmodium parasites. Malaria is a parasitic disease that is transmitted to humans through the bite of infected mosquitoes.
36. Which of the following is a Congenital Disease?
[A] Kwashiorkor
[B] Sickle-cell anemia
[C] Goitre
[D] Rheumatoid Arthritis
Show Answer
Correct Answer: B [Sickle-cell anemia]
Notes:
Sickle cell anemia is one of a group of hereditary disorders known as sickle cell diseases. It causes red blood cells to become misshapen and break down.
37. Which is the driving force of evolution?
[A] Variation
[B] Mutation
[C] Extinction
[D] Adaptation
Show Answer
Correct Answer: A [Variation]
Notes:
Variation is the driving force of evolution. Genetic variation is the presence of differences in the sequences of genes between different organisms of a species.
38. The alternate form of a gene is__
[A] Alternate type
[B] Recessive character
[C] Dominant character
[D] Allele
Show Answer
Correct Answer: D [Allele]
Notes:
The alternate form of a gene is Allele. An allele is a variant of a gene.
39. A rare way that a trait or disorder can be passed down through families is called which of the following?
[A] Sex-linked recessive
[B] Sex-linked dominant
[C] Autosomal dominant
[D] None of these
Show Answer
Correct Answer: B [Sex-linked dominant]
Notes:
A rare way that a trait or disorder can be passed down through families is called Sex-linked dominant. An abnormal gene on the X chromosome can cause sex-linked dominant disease.
40. The ____ is the stem-like part of the leaf that joins the blade to the stem, is known as:
[A] Vein
[B] Petiole
[C] Stipules
[D] Midrib
Show Answer
Correct Answer: B [Petiole]
Notes:
The petiole is the stalk-like structure which connects the leaf blade to the stem. The petiole has tiny tubes, that connect the veins on the leaf blade to the stem. Few of these enable water transport to the leaf while the other carry food away from the leaf to other parts of the plant.
