Mention a single word for the following.
a) Sexes are not separate.
b) Body wall with three layers.
c) File like rasping organs in Mollusca.
d) Segmentation of animal body.
e) The property of a living organism to emit light.
f) Alternation of generation in Cnidarians.

Read the following statements and find out the incorrect statements. a. Asexual reproduction is common among single celled organisms, and in plants and animals with relatively complex organisations. b. In yeast, the division is unequal and small buds are produced that remain attached initially to the parent cell which eventually gets separated and mature into new yeast organism (cells). c. Vegetative reproduction is also a type of asexual reproduction. d. While in animals and other simple organisms the term vegetative reproduction is used unambiguously, in plants, the term asexual reproduction is frequently used. e. Water hyacinth is also called 'Terror of Bengal.'

Among the following, select the correct statements. (a) In majority of higher plants and animals, growth and reproduction are mutually exclusive events. (b) In non-living objects growth is byaccumulation of material on the surface. (c) An isolated metabolic reaction outside the body of an organism, performed in a test tube is neither living nor non-living. (d) All organisms, from the prokaryotes to the most complex eukaryotes can sense and respond to environmental cues.

Read the following statements and find out the incorrect statements. a. Ovules generally differentiate a single megaspore mother cell (MMC) in the chalazal region of the nucellus. b. The MMC undergoes reduction division and produces four megaspores. c. In a majority of angiosperms, one of the megaspore is degenerated while the other three remains functional. d. The nucleus of the functional megaspore divides mitotically three times and form 2-nucleate, 4-nucleate and later 8-nucleate stages of the embryo sac. e. These mitotic division are strictly free nuclear, that is, nuclear division are immediately followed by cell wall formation.

During a field trip Raju has some organisms with the following characters. Help him to identify the phyla of those organisms. a) Metameically segmented body. b) Body covered with calcareous shell. c) Dorso-ventrally flattened leaf like body. d) Body divided into head, thorax and abdomen.

During the field trip a group of students collected some organisms with following characters. Help them to identify the phyla of those organisms. a) Dorsoventrally flattened and leaf like body. b) Jelly tike body with eight ciliated combplates. c) Body covered with calcareous shell. d) Spiny skinned body with radial symmetry.