cells are of__________types?
cells are of__________types?
A. 4
B. 3
C. 2
D. 1
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The molecules of living matter that provide building blocks are mostly based on:
The molecules of living matter that provide building blocks are mostly based on:
A. Carbon
B. Nitrogen
C. Hydrogen
D. AmmoniaThe atoms of different elements combine with each other through ionic or covalent bonding to produce compounds this stable form is called__________?
The atoms of different elements combine with each other through ionic or covalent bonding to produce compounds this stable form is called__________?
A. An organ
B. A molecule
C. Tissue
D. Both a and cA smallest contractile unit of muscle contraction called sarcomere is the area between two:
A smallest contractile unit of muscle contraction called sarcomere is the area between two:
A. H- zone
B. M- Line
C. Z- Line
D. A bandRoots of a plant show______________?
Roots of a plant show______________?
A. Positive phototropism and negative geotropism
B. Negative phototropism and positive geotropism
C. Negative tactic movement and positive tropic movement
D. Positive geotropism of stem and rootsThe concept that various organisms dominated this planet during various geological time period and thus placing organisms in a time squence came from the studies by ?
The concept that various organisms dominated this planet during various geological time period and thus placing organisms in a time squence came from the studies by ?
A. Environmental biologist
B. Paleontologist
C. Marine biologist
D. Social biologistSecondary cell wall of sclerenchyma cells is impregnated with_________________?
Secondary cell wall of sclerenchyma cells is impregnated with_________________?
A. Cellulose.
B. Peptidoglycan and murein.
C. Lignin.
D. Pectin.