Placentation in tomato and lemon is
parietal
free central
marginal
marginal
D.
marginal
Lemon or Citrus (Family-Rutaceae), tomato or Lycopersicon sp. (Family-Solanaceae), China rose or Hibiscus (Family Malvaceae) etc. have axile placentation. It occurs in multi carpellary, syncarpous ovary. Inward growth of margins of carpels forms a multi carpellary condition which contains an axis in the centre. Placentae arise from this central axis which bear ovules.
A person entering an empty room suddenly finds a snake right in front on opening the door. Which one of the following is likely to happen in his neurohormonal control system?
Sympathetic nervous system is activated releasing epinephrine and norepinephrine from adrenal medulla
Neurotransmitters diffuse rapidly across the cleft and transmit a nerve impulse
Hypothalamus activates the parasympathetic division of brain
Hypothalamus activates the parasympathetic division of brain
During gamete formation, the enzyme recombinase participates during
metaphase - I
anaphase-II
prophase-I
prophase-I
The correct sequence of cell organelles during photorespiration is
chloroplast - Golgi bodies - mitochondria
chloroplast-rough endoplasmic reticulum -dictyosomes
chloroplast-mitochondria-peroxisome
chloroplast-mitochondria-peroxisome
Which one of the following is correctly matched?
Passive transport of nutrients - ATP
Apoplast - Plasmodesmata
Potassium-Readily mobilization
Potassium-Readily immobilization
Which one of the following is a correct statements?
Pteridophyte gametophyte has a protonemal and leafy stage
In gymnosperms female gametophyte is free-living
Antheridiophores and archegoniophores are present in pteridophytes
Antheridiophores and archegoniophores are present in pteridophytes
Which one of the following does not differ in E.coli and Chlamydomonas?
Ribosomes
Chromosomal organisation
Cell wall
Cell wall
