11. Which of the following at the opposite of micropylar end represents the basal part of the ovule?
[A] Hilum
[B] Nucellus
[C] Chalaza
[D] Funicle
Show Answer
Correct Answer: C [Chalaza]
Notes:
The chalaza is a structure inside bird and reptile eggs and plant ovules. It attaches or suspends the yolk or nucellus within the larger structure. It represents the basal part of the ovule.
12. Which of the following does not hold true for Animal belonging to Phylum chordate?
[A] A post-anal part(tail) is present
[B] Notochord present
[C] Pharynx perforated by gill slits.
[D] Heart is dorsal(if present)
Show Answer
Correct Answer: D [Heart is dorsal(if present)]
Notes:
Chordata is a familiar phylum that includes organisms like mammals, fish, birds, reptiles, and amphibians (all vertebrates); sea squirts (tunicates); and lancelets (cephalochordates).
13. Which of the following are the three important micronutrients essential for humans?
[A] Copper, zinc and iodine
[B] Zinc, copper and potassium
[C] Nitrogen, molybdenum and iodine
[D] Sulphur, copper and iron
Show Answer
Correct Answer: A [Copper, zinc and iodine]
Notes:
There are some minerals which are needed in the diet in amounts less than100mg/day. These are referred to as trace elements. These minerals include Iron, Zinc, Iodine, Manganese, Selenium and Copper. There deficiency may be rare but can prove fatal.
14. Which of the following is the major component of honey?
[A] Glucose
[B] sucrose
[C] maltose
[D] fructose
Show Answer
Correct Answer: D [fructose]
Notes:
Fructose comprises the major portion of honey – about 82%. The carbohydrates present are the monosaccharides fructose (38.2%) and glucose (31%); and disaccharides (~9%) sucrose, maltose, isomaltose, maltulose, turanose and kojibiose.
15. Which one of the following statements is not correct?
[A] All echinoderms are viviparous
[B] Round worm has no circulatory system
[C] In bony fishes, swim bladder is usually present
[D] In cartilaginous fishes, fertilisation is internal
Show Answer
Correct Answer: A [All echinoderms are viviparous]
Notes:
Echinoderm is the common name given to any member of the phylum Echinodermata of marine animals. The adults are recognizable by their radial symmetry, and include such well-known animals as starfish, sea urchins, sand dollars, and sea cucumbers, as well as the sea lilies or “stone lilies”.
The sexes are separate except few echinoderm species. There is no sexual dimorphism. Fertilization is external and few forms are viviparous.
16. What is the name of the vessel that delivers the nutrient rich blood from the stomach and small intestine to the liver?
[A] Left hepatic artery
[B] Hepatic vein
[C] Right hepatic artery
[D] Hepatic portal vein
Show Answer
Correct Answer: D [Hepatic portal vein]
Notes:
The portal vein or hepatic portal vein is a blood vessel that carries blood from the gastrointestinal tract, gallbladder, pancreas and spleen to the liver. This blood contains nutrients and toxins extracted from digested contents.
17. Which part of the human body is affected by Alziemer’s disease?
[A] Brain
[B] Lungs
[C] Heart
[D] Kidneys
Show Answer
Correct Answer: A [Brain]
Notes:
Alziemer’s is a disease which attacks the neural system, It results in continuous decline in the number brain cells which leads to loss of memory.
18. What is the pH range of blood?
[A] 6.55-6.85
[B] 1.55-3.55
[C] 10.5-12
[D] 7.35-7.45
Show Answer
Correct Answer: D [7.35-7.45]
Notes:
Blood has a pH range of 7.35-7.45 which indicates that blood is slightly basic/alkaline. pH scale from 0 to 7 indicates acidic nature, 7 to 14 indicates basic nature of the solution.
19. Who among the following is considered as the father of microbiology?
[A] Stephen Hales
[B] Antonie Van Leeuwenhoek
[C] Edwin John Butler
[D] Pier Antonio Micheli
Show Answer
Correct Answer: B [Antonie Van Leeuwenhoek]
Notes:
Antoine van Leeuwenhoek used the single-lens microscope he built to make the first observations of bacteria and protozoa. Leeuwenhoek is universally acknowledged as the father of microbiology.
20. In bryophytes and pteridophytes, male gametes are transported through which of the following?
[A] Air
[B] Water
[C] Birds
[D] Insects
Show Answer
Correct Answer: B [Water]
Notes:
In plants, water acts as the channel through which gamete transfer takes place.
