Question

Give the correct term for the following

a-A developing embryo

b-Second phase of seed development after cell division.

c-The mature ovary wall that develops into a fruit wall.

d-The oil bodies on the outside of seeds

e-The pathway of water between living cells via the plasmodesmata

f-Root system formed from a strongly developed primary root and its branches

g-. The central column of cells in the root cap.

h-Negatively gravitropic air roots

i-Large intercellular air spaces in aquatic and wetland plants

j-The central area of the stem or root that contains procambium derived tissues and includes the vascular tissue, pith occasionally and a pericycle

Answer 1

a)A developing embryo is called a seed.

b)Second stage occurs after fertilization of egg with sperm.The second stage is called triple fusion ,i.e. fusion of sperm with polar nuclei.Ans:Triple fusion

c)Pericarp i.e. present as epicarp,mesocarp and endocarp in seed. Ans:Pericarp

d)Glyoxisomes,special fat storing body ,similar as peroxisomes of animal. Ans:Glyoxisomes

e)Symplastic pathway helps in conduction of water from root hair cells to xylem. Ans: Symplastic pathway

f) Ans: Tap root system

g)Initial cells or apical meristem ,that divides continuously and differentiates to form the root cap. Ans:Initial cells or apical meristem.

h)Negatively gravitropic air roots are also called pneumatophores that face problem for respiration inside saline land ,so grow upward against gravity. Ans:Pneumatophores

i)Large intercellular air spaces are found in aquatic plants to help them in floating and these are called aerenchyma and it is the modification of parenchyma. Ans:Aerenchyma

j)Ground tissue