Stinging capsules (nematocysts) are found in
wasp and honeybee
scorpion and cobra
sea pen and sea fan
cactus and Venus flytrap
India is one of the twelve megadiversity countries with of genetic resources of the world
Which of the following is not an invasive species?
In which of the following sets of organisms, does the external fertilization occur?
Echinodermata and mosses
Hemichordata and ferns
Amphibians and algae
Reptiles and gymnosperms
Occurrence of triploid (3n) primary endosperm nucleus is a characteristic feature of
Endosperm nourishes embryo in seed plants. In gymnosperms, it represents the female gametophyte and is haploid (n). In angiosperms, it is a special tissue which is formed as a result of fusion of a male gamete with diploid secondary nucleus of the central cell. The fusion product is primary endosperm cell having a triploid (3n) endosperm nucleus.
From the following groups, select the one which has only secondary metabolites?
Arbrin, cellulose, arginine, tyrosine
Glycine, gums, serine, diterpenes
Carotenoids, phenylalanine, curcumin, rubber
Conclavin-A, morphine, codeine, vinblastin
In a diploid cell, at which stage of cell cycle, the amount of DNA is doubled?
G1 and G2 phase
S, G2 and M phase
C4 plants have better productivity because
C4 plants absorb more light
C4 plants absorb more CO2
C4 plants does not carry photorespiration
C4 plants have more amount of RuBisCO
Match the source gland with its respective hormone and function and select the correct option.
|Anterior pituitary||Oxytocin||Contraction of uterine muscle|
|Anterior pituitary||Vasopressin||Induces reabsorption of water in nephron|
|Thymus||Thymosin||Proliferation of T- lymphocytes|
|- cells of islets of Langerhans||Glucagon||Uptake of glucose into the cell|