Assertion During development, general characters appear before specialised characters.
Reason Embryos of different groups resemble with each other in early developmental stages

Assertion: Dinosaurs were connecting links between reptiles and birds. Reason: They had characters of two different groups.

Assertion : Action and reaction force balance each other . Reason : Both forces act always on two different bodies .

Assertion : During embryo development in dicots, suspensor serves as the main nutritive tissue for the embryo. Reason : The last cell of the suspensor at the end adjacent to the embryo is known as haustorium.

Assertion : During embryo development in dicots, suspensor serves as the main nutritive tissue for the embryo. Reason : The last cell of the suspensor at the end adjacent to the embryo is known as haustorium.

Assertion : During embryo development in dicots, suspensor serves as the main nutritive tissue for the embryo. Reason : The last cell of the suspensor at the end adjacent to the embryo is known as haustorium.

Assertion : During embryo development in dicots, suspensor serves as the main nutritive tissue for the embryo. Reason : The last cell of the suspensor at the end adjacent to the embryo is known as haustorium.

Assertion : The purpose of crop improvement is to develop varieties with desirable characters. Reason : Plant breeders are concerned with crop improvement.

Assertion : In mammals the female secondary sexual characters are developed by gonadotropins. Reason : Gonadotropins are secreted by graafian follicle.

Assertion: The development in cockroach is heterometabolous metamorphosis. Reason: Young ones resemble the adults in all characters.