Appearance of vegetative propagules from the nodes of plants such as sugarcane and ginger is mainly because
nodes are shorter than internodes
nodes have meristematic cells
nodes are located near the soil
nodes have non-photosynthetic cells
Which of the following statements, support the view that elaborate sexual reproductive process appeared much later in the organic evolution.
I. Lower groups of organisms have simpler body design.
II. Asexual reproduction is common in lower groups.
III. Asexual reproduction is common in higher groups of organisms.
IV. The high incidence of sexual reproduction in angiosperms and vertebrates.
Choose the correct answer from the options given below.
I and III
I and III
II and IV
II and III
Offspring formed by sexual reproduction exhibit more variation than those formed by asexual reproduction because
sexual reproduction is a lengthy process
gametes of parents have qualitatively different genetic composition
genetic material comes from parents of two different species
greater amount of DNA is involved in sexual reproduction
Choose the correct statement from amongst the following.
Dioecious (hermaphrodite) organisms are seen only in animals.
Dioecious organisms are seen only in plants.
Dioecious organisms are seen in both plants and animals.
Dioecious organisms are seen only in vertebrates.
There is no natural death in single celled organisms like Amoeba and bacteria because
they can'not reproduce sexually
they reproduce by binary fission
parental body is distributed among the offspring
they are microscopic