31. Which of the following is the largest group of mammals?
[A] Rodentia
[B] Chiroptera
[C] Carnivora
[D] Insectivora
Show Answer
Correct Answer: A [Rodentia]
Notes:
Rodentia is the largest group of mammals. Rodents are mammals of the rodent order. It is characterized by a pair of continuously moving incisors in each of the upper and lower jaws.
32. Civet oil is extracted from which of the following species?
[A] Agamospecies
[B] Nominalistic
[C] Viverridae
[D] None of these
Show Answer
Correct Answer: C [Viverridae]
Notes:
Civet oil is extracted from Viverridae species. It is used as a flavoring in foods and beverages.
33. The reflex actions that involve the brain are called which of the following?
[A] Stimulus
[B] Cerebral reflexes
[C] Spinal reflexes
[D] Reflex arc
Show Answer
Correct Answer: B [Cerebral reflexes]
Notes:
The reflex actions that involve the brain are called Cerebral reflexes. Cerebral reflexes are those reflexes that involve the brain, which is the process of thinking.
34. What is the name of the smallest muscle?
[A] Gutters Maximus
[B] Antagonists
[C] Stapedius
[D] None of the above
Show Answer
Correct Answer: C [Stapedius]
Notes:
The stapedius is the smallest skeletal muscle in the body, about 1 mm in length.
35. Granulocytes and agranulocytes are a classification of which of the following?
[A] White blood cells
[B] Red blood cells
[C] Platelets
[D] Homeostasis
Show Answer
Correct Answer: A [White blood cells]
Notes:
Granulocytes and agranulocytes are a classification of White blood cells. Granulocytes are leukocytes, with the presence of granules in their cytoplasm while Agranulocytes are leukocytes, with the absence of granules in their cytoplasm.
36. What does the liver do to help digestion?
[A] Makes important enzymes
[B] Neutralizes stomach acid
[C] Produces bile
[D] Regulates insulin
Show Answer
Correct Answer: C [Produces bile]
Notes:
The liver makes a digestive juice called bile that helps digest fats and certain vitamins.
37. What is Campylobacter abortion in animals?
[A] Abortions after 4-8 months of pregnancy
[B] incubation period is generally 1-2 weeks
[C] abortion in late pregnancy
[D] All of the above
Show Answer
Correct Answer: C [abortion in late pregnancy]
Notes:
Ovine campylobacteriosis is an infectious disease that causes miscarriage in late pregnancy. It is caused by the bacteria Campylobacter fetus.
38. What is the nitrogen-fixing symbiotic organism present in Azolla?
[A] nostoke
[B] anabaena
[C] aulosira
[D] azospirillum
Show Answer
Correct Answer: B [anabaena]
Notes:
Anabaena is the nitrogen-fixing symbiotic organism present in Azolla. Anabaena is a genus of filamentous cyanobacteria that exist as plankton.
39. Which metal microparticles are used in gene guns?
[A] Aurum
[B] Nitrogen
[C] Magnesium
[D] Cuprum
Show Answer
Correct Answer: A [Aurum]
Notes:
The gene gun technique uses gold-coated microparticles along with the DNA. Aurum is a Latin word for gold. The other metal used for this technique is tungsten.
40. Which one of the following features is absent in a virus?
[A] Presence of cell wall
[B] Reproduce within host cell
[C] Fully parasitic in nature
[D] Presence of either DNA or RNA
Show Answer
Correct Answer: A [Presence of cell wall]
Notes:
A virus has a simple structure. It has no internal cellular structure, no cell wall or cell membrane, just the protein coat that holds the string of nucleic acid. It is made only of a nucleic acid + a protein coat. A cell wall is a layer located outside the cell membrane found in plants, fungi, bacteria, algae, and archaea.
