One of the characteristic of sieve tube is

• it is a part of phloem

• function is transport of inorganic solutes

• it is dead cell

• sieve plate is not present

Chromosomes replicate in which stage of meiosis?

• Prophase- I

• Prophase- II

• Telophase- I

• Interphase

Which one of the following statement correctly define the term homonym?

• Identical name of two different taxon

• Two or more names belonging to the same taxon

• When species name repeats the generic name

• Other name of a taxon given in a language other than the language of zoological/ botanical nomenclature

Mesoglia is seen in between

• ectoderm and endoderm

• ectoderm and mesoderm

• mesoderm and endoderm

• just below mesoderm

Which of the following is called stress hormone?

• Abscisic acid

• Auxin

• Cytokinin

• Gibberellic acid

Plants purify air by which process?

• Photorespiration

• Photosynthesis

• Photophosphorylation

• Transpiration

Which of the following element is responsible for Minamata disease?

• Hg

• Pb

• Cd

• Fe

Dimorphism of chloroplast is found in

• C₃ - plants

• C₄ - plants

• CAM plants

• Both (b) and (c)

A substance that induces dormancy of seed is

• ABA

• GA

• thio-urea

• cytokinin

The Gram (-) bacteria detect and respond to the chemicals in their surroundings by

• muramic acid

• lipopolysaccharide

• volutin granules

• porin