Gymnosperms are also called soft wood spermatophytes because they lack:
Options
(a) Cambium (b) Phloem fibres (c) Thick-walled tracheids (d) Xylem fibres
Correct Answer:
Xylem fibres
Explanation:
No explanation available. Be the first […]
Dinosaurs dominated the world in which of the following geological era?
Options
(a) Devonion (b) Coenozoic (c) Jurassic (d) Mesozoic
Correct Answer:
Mesozoic
Explanation:
Dinosaurs dominated the world in mesozoic era. In Triassic […]
Cu ions released from copper – releasing Intra Uterine Devices (IUDs) :
Options
(a) make uterus unsuitable for implantation (b) increase phagocytosis of sperms (c) suppress sperm motility (d) prevent ovulation
Correct Answer: […]
Which one of the following is not a part of a transcription unit in DNA?
Options
(a) The inducer (b) A terminator (c) A promoter (d) The structural gene
Correct Answer:
The inducer
Which one of the following in birds, indicates their reptilian ancestry?
Options
(a) Scales on their hind limbs (b) Four-chambered heart (c) Two special chambers crop and gizzard in their digestive tract (d) […]
Which one of the following have the highest number of species in nature?
Options
(a) Fungi (b) Insects (c) Birds (d) Angiosperms
Correct Answer:
Insects
Explanation:
In nature insects have the highest number of […]
Where do certain symbiotic micro-organisms normally occur in human body?
Options
(a) Caecum (b) Oral lining and tongue surface (c) Vermiform appendix and rectum (d) Duodenum
Correct Answer:
Caecum
Explanation:
The caecum is a […]
The cell junctions called tight, adhering and gap junctions are found in
Options
(a) connective tissue (b) epithelial tissue (c) neural tissue (d) muscular tissue
Correct Answer:
epithelial tissue
Explanation:
The cell junctions […]
In the human female, menstruation can be deferred by a administration of
Options
(a) combination of FSH and LH (b) combination of estrogen and progesterone (c) FSH only (d) LH only
Correct Answer: […]
Flagellated male gametes are present in all the three of which one of the following sets?
Options
(a) Zygnema, Saprolegnia and Hydrilla (b) Fucus, Marsilea and Calotropis (c) Riccia, Dryopteris and Cycas (d) […]
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