Question

Rewrite the following terms in correct logical sequence.

[5]

i)Thallophytes, Bryophytes, Angiosperms, Gymnosperms, Pteridophytes

ii) Nuclear membrane, Cell wall, Cytoplasm, Nucleolus, Cell membrane

iii)

Pollen tube, Stigma, Ovary, Pollen grain, Embryo sac

iv)

Tegmen, Embryo, Testa, Radicle, Cotyledon

v)

Dendrites, Cell body, Nucleus, Axon, Nerve endings​

Answer 1

(i) Plant Kingdom – Thallophytes (Algae) – Bryophytes – Pteridophytes

Plantae.

Plant Kingdom.

Algae – Thallophytes. Chlorophyceae – Green Algae. Phaeophyceae – Brown Algae. Rhodophyceae – Red Algae. Uses of algae.

Bryophytes.

Pteridophytes.

Cryptogamae.

(ii) Nucleous, nuclear membrane, cytoplasm, cell wall and cell membrane. Explanation the logical sequence is from the inside part of the cell to the outside of the cell.. The cytoplasm is enclosed inside the cell wall which lies inside cell membrane

(iii) (1) Pollen grain 》 (2) Pollen tube 》(3) stigma 》(4) ovary 》(5) Embryo sac

(iv) Pea is dicot and its seed has testa,cotyledons and embroyonic axis . its embryo consists of the cotyledons, plumule and radical making option

D correct answer. The freshy round structure on the embroyonic axis that contains reserve food material is know as cytyledon.The radicle is present on the miscropylar end of embryonic axis while plumule is present on the oppsite extreme

(v) Most neurons have a cell body, an axon, and dendrites. The cell body contains the nucleus and cytoplasm. The axon extends from the cell body and often gives rise to many smaller branches before ending at nerve terminals. Dendrites extend from the neuron cell body and receive messages from other neurons.