Which of these characteristics belong to organisms showing internal fertilization?
(A) Eggs are formed inside the female body where they fuse with male gamete.
(B) Male gametes are motile
(C) Number of eggs produced less in number
(D) All of the above
Development of embryo from zygote is:
Life in all organism starts from:
(A) Single cell zygote
(B) Two celled zygote
(C) Single cell embryo
(D) Multicellular embryo
Select the total number of true statements.
(A) In organisms belonging to fungi and algae, the zygote develops a thick wall that is resistant to dessication and damage.
(B) Formation of diploid zygote is universal in all sexually reproducing organisms.
(C) Syngamy occurs inside the body of the organism in internal fertilization.
(D) In organism with haplontic life cycle zygote divides by meiosis to form haploid spores that grow into haploid individuals.
Following are oviparous except:
In oviparous animals like birds and reptiles the fertilized egg in covered by shell made up of
(B) Na2 CO3
Chances of survival of the young one is greater in:
(A) Internal fertilization
(B) External fertilization
(C) Oviparous animals
(D) Viviparous animals
After fertilization which part of flower generally withers and falls off?
(D) All of these
Select the false statement.
(A) Ovule develops into seed.
(B) Ovary develops into fruit.
(C) Zygote develops into embryo.
(D) Placenta develops into pericarp.
Gametes in haploid organisms are produced by:
Embryonal protection and care are better in:
After fertilization in angiosperms, ovules develop into:
The progenitor of the next generation inside the mature seed is known as:
Identify the ploidy of the following parts of flowering plants.
Ovary, Anther, Egg, Pollen, Male gamete and Zygote
(A) 2n, 2n, n, n, n, 2n
(B) 2n, 3n, n, n, 2n, 2n
(C) 2n, n, n, n, n, 2n
(D) 2n, 2n, n, 2n, n, 2n
Select the correct statement from the following.
(A) In flowering plants, the zygote is formed inside the ovule.
(B) In reptiles and birds, the fertilized eggs covered by hard calcareous shell (Cleidoic) are laid in a safe place in environment.
(C) In organisms belonging to fungi and algae, the zygote develops a thick wall that is vulnerable to dessication and damage.
(D) During embryogenesis, zygote undergoes cell division and cell differentiation
(A) A and C only
(B) A, B and C only
(C) C and D only
(D) A, Band D only