(A) They can effect enzymes which regulate many important chemical reactions.
(B) They can bind directly to the cells or the molecules upsetting the chemical balance within the body.
(C) They can cause the release of other substances that have an adverse effect.
(D) All of the above
Tag: Zoology mcqs
Which one of the following is not included in single gene effect mechanism?
(A) Neurospora
(B) Yeast
(C) Drosophilla
(D) Some fish
A ground plan showing relation of flora leaves to each other and to mother axis is called?
(A) Floral diagram
(B) Inflorescence
(C) Floral formula
(D) Placentation
which one is drought resistant xerophyte(Succulent plant)?
(A) Opuntia
(B) Suaeda
(C) Typha
(D) Triantherna
Weathering may be?
(A) Biological
(B) Physical
(C) Chemical
(D) All of the above
Which one is not submerged hydrophyte?
(A) Wolfia
(B) Vallisnaria
(C) Hydrilla
(D) Elodea
They are the outgrowth of somatic hyphae which the fungus sink into plant host cells through minute pores in the cell wall?
(A) Appressoria
(B) Trape
(C) Haustoria
(D) Rhizomorph
which one is not a lichen thallus?
(A) Fruiticose
(B) Tolypella
(C) Foliose
(D) Crustose