Emerson's enhancement effect and red drop have instrumental in the discovery of

• two photosystems operating simultaneously

• photophosphorylation and cyclic electron transport

• oxidative phosphorylation

• oxidative phosphorylation

The standard petal of papilionaceae corola is also called

• pappus

• vexillum

• corona

• corona

Nomenclature is governed by certain universal rules. Which one of the following is contrary to the rules of nomenclature?

• The first word in biological name represents the genus name and the second is a specific epithet

• The names are written in Latin and are Italicised

• When written by hand, the names are to be underlined

• When written by hand, the names are to be underlined

In a chloroplast the highest number of protons are found in

• lumen of thylakoids

• inter membrane space

• antennae complex

• antennae complex

Stems modified into flat green organs performing the functions of leaves are known as

• phyllodes

• phylloclades

• scales

• scales

Select the correct statement

• Salvinia, Gingko and Pinus all are gymnosperm

• Sequoia is oneis one ot the talles trees

• The leaves of gymnosperm are not well adapted to extremes of climate

• The leaves of gymnosperm are not well adapted to extremes of climate

Spindle fibres attach on to

• kinetochore of the chromosome

• centrosome of the chromosome

• kinetosome of the chromosome

• kinetosome of the chromosome

Which of the following is not a characteristic feature during mitosis in somatic cells?

• Disappearance of nucleolus

• Chromosome movement

• Synapsis

• Synapsis

In meiosis crossing over is initiated at

• leptotene

• zygotene

• diplotene

• diplotene

Blood pressure in the pulmonary artery is

• more than that in the carotid

• more than that in the pulmonary vein

• less than that in the Vena cava

• less than that in the Vena cava