Question

1. Define parthenogenesis

2. What do you mean by IVF

3. What do you mean by non-identical and identical twins

4. define metamorphosis and write difference between direct development and indirect development.​

Answer 1

Answer:

1.reproduction from an ovum without fertilization, especially as a normal process in some invertebrates and lower plants.

2.In vitro fertilization (IVF) is the joining of a woman's egg and a man's sperm in a laboratory dish. In vitro means outside the body.

3.Whether your babies are identical or non-identical depends on how they were formed. Non-identical twins are created when a woman produces two eggs at the same time and both are fertilised, each by a different sperm. ... Identical twins occur in about one-third of multiple pregnancies

4.It is a type of development in which an embryo develops into a mature individual without involving a larval stage. Metamorphosis involving development of larva to a sexually-mature adult is present. ... It occurs in fishes, reptiles, birds, and mammals.

Answer 2

Answer:

1. Parthenogenesis is a natural form of asexual reproduction in which growth and development of embryos occur without fertilization by sperm. In animals, parthenogenesis means development of an embryo from an unfertilized egg cell. In plants parthenogenesis is a component process of apomixis.

2. In vitro fertilization (IVF)

3. Whether the babies are identical or non-identical depends on how they were formed. Non-identical twins are created when a woman produces two eggs at the same time and both are fertilised, each by a different sperm. ... Identical twins occur in about one-third of multiple pregnancies.

4. It is a type of development in which an embryo develops into a mature individual without involving a larval stage. Metamorphosis involving development of larva to a sexually-mature adult is present. ... It occurs in fishes, reptiles, birds, and mammals.