carthamus tinctorius belongs to family
Asteraceae
Solanaceae
Malvaceae
Fabaceae
A.
Asteraceae
Carthamus tinctorius (safflower) belongs to family Asteraceae.The asterfamily(Asteraceae) is one of the largest angiospermfamilies, with more than 1,620 genera and 23,600 species of herbaceous plants, shrubs, and trees distributed throughout the world. The plants are characterized by their composite flower heads and one-seeded achene fruits.
The plant undergoes wilting when
xylem is blocked
cambium is blocked
phloem is blocked
some roots are reduced in number
A.
xylem is blocked
WiltingThe condition that arises in plants when more water is lost by evaporation than is absorbed from the soil. This causes the cells to lose theirturgorand the plant structure droops. Plants can normally recover from wilting if water is added to the soil, but permanent wilting and possible death can result if the plant does not have access to water for a long period of time. In certain plants wilting is important as a mechanism to avoid overheating: when the leaves droop they are taken out of direct contact with the sun's rays. When the sun sets the plant can begin to transpire at the normal rate and the cells of the leaves regain their turgor.
Xylem is responsible for transport of water. If xylem is blocked, plant will undergo wilting
Cranium is made up of
8 bones
12 bones
10 bones
16 bones
A.
8 bones
The human skull is generally considered to consist of twenty-two bones—eight cranial bones and fourteenfacial skeletonbones. In the neurocranium these are theoccipital bone, twotemporal bones, twoparietal bones, thesphenoid,ethmoidandfrontal bones.
The function of surfactant is/are
facilitating lung expansion
maintaining the stable size of the alveoli
to reduce the surface tension on the alveoli
all of the above
C.
to reduce the surface tension on the alveoli
Pulmonary surfactant is a mixture of lipids and proteins which is secreted by the epithelial type II cells into the alveolar space. Its main function is to reduce the surface tensionat the air/liquid interface in the lung.
The organism in which Kreb's cycle does notoccur in mitochondria is
yeast
E.coli
Ulothrix
mould
B.
E.coli
Kreb cycle doesn't occurs in mitochondria in E.coli beacuseE.coli are prokaryotes.
Stomata open at night and closes during day in
xerophytes
gametophytes
mesophytes
mesophytes
A.
xerophytes
Crassulacean acid metabolism, also known asCAMphotosynthesis, is a carbon fixation pathway that evolved in someplantsas an adaptation to arid conditions. In aplantusing fullCAM, thestomatain the leaves remain shut during the day to reduce evapotranspiration, butopenat night to collect carbon dioxide (CO2).
During muscle contraction
size of 'A' bands remain same
size of 'H' zone becomes smaller
size of 'I' band decreases
diameter of fibre increases
A.
size of 'A' bands remain same
During muscle contraction, both I-band and H-zone progressively shorten and eventually disappear while length of A-band remains constant.
Two chief functions of the leaves are
photosynthesis and respiration
photosynthesis and transpiration
transpiration and respiration
respiration and digestion
B.
photosynthesis and transpiration
Photosynthesis and transpiration both are equally essential processes because photosynthesis helps to maintain the equilibrium position of O2 and CO2 in the atmosphere and transpiration maintains the atmospheric temperature.
Lucocytes (WBCs) are considered as true cells because
they possess nucleus
they do not contain haemoglobin
they show great power of movement
they are responsible forphagocytic activity
A.
they possess nucleus
Leucocytes are called true cells because they possess nucleusunlike RBC where nucleus are absent.
The most advanced type of inflorescence is
corymb
catkin
spadix
capitulum
D.
capitulum
Capitulum is the most advanced type of inflorescence. It is the characteristic of family Compositae. In this inflorescence peduncle is flattened to form receptacle that bears centripetally arranged small sessile flowers called florets surrounded by involucre of bracts, eg., marigold, sunflower etc.