List of top Biology Questions

Refer the given figure of digestive system of earthworm and identify the part labelled X.
Plasmodium enters the human body as
Placenta and pericarp are both edible portions in
Oxidative decarboxylation of pyruvic acid results in the formation of I. $\quad$Acetyl CoA II. $\quad$C0$^2$ III. $\quad$ATP IV. $\quad$NADH + H$_+$
One hormone hastens the maturity period in juvenile conifers, a second hormone controls xylem differentiation while the third increases the tolerance of plants to various stresses and they are respectively
Non-albuminous seed is produced in
Match the sub-stage of prophase I of meiosis in Column 1 and the events in Column II and choose the right option.
Match column I with column II and select the correct option from the given codes.
Male gametophyte with least number of cells is present in
Leptocentric (amphivasal) vascular bundles are characteristically found in
Largest flower in the plant kingdom is found in
In Periplaneta americana the first and second pair of wings arise from
How are transformants selected from nontransformants?
'Cladode' is a characteristic morphological feature of
Cell wall of a fungal hyphae is composed of
Removel of keystone species cause serious disruption in the functioning of the community. Keystone species are low in abundance (or biomass) than the dominant species.
Atretic follicles are found in the
The thallus of Riccia is internally differentiated into an upper photosynthetic region and lower storage region. The lower storage region is formed from parenchymatous cells.
Pulmonary circulation consists of flow of deoxygenated blood from right ventricle to the lungs and flow of oxygenated blood from lungs to the left atrium. Systemic circulation consists of flow of oxygenated blood from the left ventricle to all parts of the body and deoxygenated blood from different parts to right atrium.
Placenta in addition to connection with mother and foetus to ductless gland. It releases human gonadotropins.
One codon may code for more than one amino acid. A codon is degenerate and ambiguous.
Interspecific competition is the only potent force in organic evolution. Unexceptionally two closely related species competing for the same resources cannot co-exist indefinitely.
In a pivot joint, rounded or pointed bone fits into a shallow depression in another bone. Pivot joints are present between the metacarpals and phalanges of the fingers.
Human heart is myogenic. The contraction is initiated by a specialized patch of modified heart muscles without requiring stimulation from nerve cells.
Which one of the following is wrongly matched?