Which of the following definitions about oviparity is false ?

Solution

The birds and reptiles are not the only oviparous species. A group of mammals, the monotremes, are also egg layers.

Seeds are regarded to be the product of sexual reproduction because they

Which of the following statements about animals that utilize external fertilization is false?

They are divided equally between terrestrial and aquatic species.
Many produce large numbers of gametes to ensure successful reproduction.
The behaviours associated with mating are often highly synchronized.
The probability of any one egg being fertilized and developing into an adult can be low.

Solution

Since external fertilization can only take place in an aquatic habitat, there are no terrestrial animals that use it.

Consider the following statements and choose the correct option.

Which of the following animals qualifies as a sexually reproducing, oviparous species ?

Solution

All these animals can reproduce sexually. However, only the chicken lays an external egg.

During spermatogenesis a single male germ cell produces_____ sperm cell(s).

Solution

During spermatogenesis a single male germ cell will undergo two meiotic divisions. This results in the production of 4 haploid sperm cells.

Find the correct combination.

Solution

The asexual reproductive structures in Hydra is bud.The a sexual reproductive structure in sponge is gemmules, in Penicillium it is conidia and in algae it is through fragmentation.

The chromosome number is haploid in

Plants identical to mother plants can be obtained from

A clone is a group of individuals obtained through

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