Double fertilization was first described by
Options
(a) Robert Brown (b) Nawaschin (c) Straburger (d) de Candolle
Correct Answer:
Nawaschin
Explanation:
No explanation available. Be the first to write the explanation for this […]
Root cap is absent in
Options
(a) mesophytes (b) hydrophytes (c) epiphytes (d) xerophytes
Correct Answer:
hydrophytes
Explanation:
No explanation available. Be the first to write the explanation for this question by […]
Devine and Collego are two trade names in agriculture. They are used as
Options
(a) bioinsecticides (b) natural insecticides (c) biofungicides (d) bioherbicides
Correct Answer:
bioherbicides
Explanation:
No explanation available. Be the first […]
Biscuspid valve regulates the flow of blood from
Options
(a) left vernicle to SA-node (b) left auricle to left vernicle (c) post caval to right auricle (d) right auricle to right vernicle
Correct […]
Bicuspid valve regulates the flow of blood from
Options
(a) left ventricle to SA Node (b) left auricle to left ventricle (c) post caval to right auricle (d) right auricle to right ventricle
A source is moving towards an observer with a speed of 20 m/s and having frequency of 240 Hz. The observer is now going towards the source with a speed of 20 m/s. Apparent frequency […]
Two closed organ pipes when sounded simultaneously give 4 beats/second. If longer pipe has a length of 1m, then length of shorter pipe will be (v=300 m/s)
Options
(a) 185.5 cm (b) 94.9 […]
X-ray beam can be deflected by
Options
(a) Magnetic field (b) Electric field (c) Both (a) and (b) (d) None of these
Correct Answer:
None of these
Explanation:
No explanation available. Be the […]
The wavelength of light emitted from second orbit to first orbit in a hydrogen atom is
Options
(a) 1.215×10⁻⁷ m (b) 1.215×10⁻⁵ m (c) 1.215×10⁻⁴ m (d) 1.215×10⁻³ m
Correct Answer:
1.215×10⁻⁷ m
Explanation: […]
In a coil having e.m.f. of 8 V induced for 0.05 s. The value of current changes from 2 A to 4 A. The value of coefficient of self induction of the coil is
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