31. Which nematode infects the roots of tobacco plants?
[A] Meloidogyne incognitia
[B] Ditylenchus dipsaci
[C] Xiphinema index
[D] Nacobbus aberrans
Show Answer
Correct Answer: A [Meloidogyne incognitia]
Notes:
Meloidogyne incognita is a nematode that infects the roots of tobacco plants, also known as ‘root-knot nematodes’. It is a plant-parasitic nematode, affecting both monocot and dicotyledonous plants.
32. Which of the following organism can transfer ‘T-DNA’ within plants?
[A] Agrobacterium tumifaciens
[B] E.coli
[C] Aspergillus niger
[D] S. typhi
Show Answer
Correct Answer: A [Agrobacterium tumifaciens]
Notes:
Agrobacterium tumefacient organism can transfer ‘T-DNA’ within the plant. It infects dicot plants.
33. In coriander, the useful parts are
____:
[A] Leaves & flowers
[B] Flowers & dried fruits
[C] Roots & leaves
[D] Leaves & dried fruits
Show Answer
Correct Answer: D [Leaves & dried fruits]
Notes:
Coriander (Coriandrum sativum), also known as cilantro, Chinese parsley or dhania, is an annual herb in the family Apiaceae. All parts of the plant are edible, but the fresh leaves and the dried seeds are the parts most traditionally used in cooking.
34. Lungs are the primary organs of ____:
[A] Digestion
[B] Respiration
[C] Constipation
[D] Perspiration
Show Answer
Correct Answer: B [Respiration]
Notes:
The lungs are the primary organs of respiration in humans and many other animals including a few fish and some snails. Their function in the respiratory system is to extract oxygen from the atmosphere and transfer it into the bloodstream, and to release carbon dioxide from the bloodstream into the atmosphere, in a process of gas exchange.
35. What is the Normal Blood Volume in human adult?
[A] 1 litre
[B] 3 litre
[C] 5 litre
[D] 7 litre
Show Answer
Correct Answer: C [5 litre]
Notes:
The average adult has a blood volume of roughly 4-5 to 5 litres, which is composed of plasma and several kinds of cells. By volume, the red blood cells constitute about 45% of whole blood, the plasma about 54.3%, and white cells about 0.7%.
36. Jaws are absent in ____:
[A] Birds
[B] Fishes
[C] Reptiles
[D] Protochordata
Show Answer
Correct Answer: D [Protochordata]
Notes:
Jaws are absent in protochordata and cyclostomata (Agantho stoma). Protochordata refers to invertabrate subphylum of phylum chordata. It includes animals such as tunicates.
37. The elements known as primary nutrients for plants are ____:
[A] Nitrogen, Phosphorus and Potassium
[B] Potassium, Boron and Nitrogen
[C] Nitrogen, Oxygen and Silicon
[D] Nitrogen, Phosphorus and Iron
Show Answer
Correct Answer: A [Nitrogen, Phosphorus and Potassium]
Notes:
Nitrogen (N), Phosphorus (P) and Potassium (K) are considered as the three essential or primary nutrients for plants. Together they make up the trio known as ‘NPK’. Other important nutrients are Calcium, Magnesium and Sulphur.
38. Meibomian glands are located in ____:
[A] Eye
[B] Ear
[C] Nose
[D] Skin
Show Answer
Correct Answer: A [Eye]
Notes:
Meibomian glands are the tiny oil glands which line the margin of the eyelids (the edges which touch when the eyelids are closed). These glands secrete oil which coats the surface of our eyes and keeps the water component of our tears away from evaporating (drying out). Together, the water and the oil layer make up the tear film.
39. Which of the following organ is responsible to remove nitrogenous waste from body?
[A] Liver
[B] Lungs
[C] Kidney
[D] Pancreas
Show Answer
Correct Answer: C [Kidney]
Notes:
The excretory system is responsible for removing nitrogen-containing wastes from the body. The main parts of the excretory system are the kidneys. The other functions of Kidney are:
• Regulate electrolyte (salt) concentrations,
• Regulate amount of fluid within the body,
• Help regulate blood pressure,
• Help maintain acid-base balance,
• Produce hormones that affect blood and bones.
40. Taxonomy is a science that deals with ____:
[A] Anatomy
[B] Morphology
[C] Economic uses
[D] Classification
Show Answer
Correct Answer: D [Classification]
Notes:
Taxonomy is the academic discipline of defining groups of biological organisms on the basis of shared characteristics and giving names to those groups. Each group (taxon) is given a rank and groups of a given rank can be aggregated to form a super group of higher rank and thus create a hierarchical classification. Carlous Linneaus is considered as father of taxonomy.
