Seeds

Question 1

Seed

Answer 1

Fertilized ovule with an embryo. Surrounded and protected by a seed coat, with or without stored food in which the embryo is embedded.

Question 2

Importance of seeds

Answer 2

Continuity, sporophyte, food, others

Question 3

Nucellus

Answer 3

Mass of parenchymatous tissue

Question 4

Matures to form perisperm

Answer 4

Nucellus

Question 5

Megaspora

Answer 5

Embryo sac

Question 6

Nuclei in embryosac

Answer 6

Egg nucleus, two synergids, three antipodal nuclei, large central cell with two polar nuclei

Question 7

Nuclei in embryo sac after fertilisation

Answer 7

Zygote egg and sperm

Primary Endosperm sperm, two polar nuclei, three antipodal cells

Question 8

Exalbuminous seed

Answer 8

Seed with large embryo surrounded by testa, no endosperm

Question 9

Albuminous seed

Answer 9

Seed with embryo embedded in endosperm surrounded by the testa, absorbed nucellus

Question 10

Perisperm

Answer 10

When nucellus develops and surrounds the endosperm and embryosac, sorrounded by testa

Question 11

Perisperm fully developed without endosperm in

Answer 11

Agrostemma githao

Question 12

Aril

Answer 12

Fleshy covering arising from the hilum and almost enveloping the seed

Question 13

Example of seed with aril

Answer 13

Nutmeg

Question 14

Caruncle

Answer 14

Localized fleshy growth arising from the micropyle

Question 15

Family with caruncle

Answer 15

Euphorbaceae

Question 16

Eg seed with caruncle

Answer 16

Castor seed