Both radial and bilateral symmetry is found in the phylum____________??
A. Protozoa
B. Porifera
C. Echinodermata
D. None of these
Category: Biology Mcqs
Joint between two parietal bones, which is infact immovable one is an example of_________??
A. Fibrous joints.
B. Cartilaginous joints.
C. Synovial joints.
D. None of these
Which of the following is a compensation point:?
A. Leaves respire and utilize O2 and release CO2.
B. Photosynthesis and respiration occur at same rate. So there is not net exchange of gases between atmosphere and plants.
C. Rate of photosynthesis increases, so do the O2 production, with a net release of oxygen coupled with the uptake of CO2.
D. Rate of respiration becomes more than rate of photosynthesis.
Chemically auxins are____________??
A. Indole propionic acid.
B. Indole carboxylic acid.
C. Indole acetaldehyde
D. Indole acetic acid.
_________________ cells of phloem are directly involved in transport of organic solutes??
A. Parenchyma
B. Companion cell
C. Tracheid
D. Sieve element
Certain types of whales are also __________ feeder??
A. Fluid
B. Macrophagous
C. Filter
D. None of these
Microfossile often present in petroleum producing formationsare those of__________??
A. Diatioms
B. Heliozoans
C. Radiolarians
D. Foraminiferans
Which of the following hormone is predominantly responsible for bone weakening in older women??
A. Progesterone.
B. Oestrogen.
C. Parathyroid hormone.
D. Calcitonin.
Radiolarians belong to which of the following protozoal group____________??
A. Zooflagellates
B. Actinopods
C. Foraminifera
D. Apicomplexans
Which statement is true about an aqueous medium________________??
A. Ionic as well as non ionic substance in aqueous media retains their identity
B. Enzymes can not perform catalysis reaction in this medium
C. Ions and molecules move randomly thus are in more favorable state to react with other molecules and ions
D. It is less favorable media for chemical reactions
