Answer the following questions:
(a) Define reproduction.
(b) What is germination?
(c) Name different types of seeds with examples.
(d) What is the importance of cotyledons?
What is the role of seed in formation of a new plant?
(f) What are the conditions required for a seed to germinate?
Why do we grow crops?
(h) What is vegetative reproduction? Give an example.
(i) What are spores? Name some plants that reproduce through spores
i) Name different stages of crop production.
Answers
Answer:
a) Reproduction - The production of new organism from the existing organism of the same species is called reproduction. Reproduction is essential for the survival of species on this earth. Reproduction give rise to more organism with the same basic characteristics as their parents.
b)Germination refers to the method by which an associated organism grows from a seed or a reproductive structure. The seed absorbs water through a structure referred to as an aperture, that induces swelling of the seed till it splits open.
c) (1) Dicotyledonous Ex albuminous Seeds (2) Dicotyledonous Albuminous Seeds (3) Monocotyledonous Albuminous Seeds and (4) Monocotyledonous Ex-albuminous Seeds.
d)The cotyledon encourages leaf growth in a plant's early stages of life. These leaves are important because they serve as the chief way for plants to get the nutrients they need to continue growing and thriving. When cotyledons become new green leaves, the cotyledons raise over ground level.
e)The formation of the seed completes the process of reproduction in plants (started with the development of flowers and pollination), with the embryo developed from the zygote and the seed coat from the integuments of the ovule. ... The new seed is formed in plant structures called fruits.
f)Oxygen, suitable temperature and water.
g)We need to grow crops in order to satisfy our hunger.as from crops we get raw material from which we can make food.
h)Reproduction through vegetative parts without the help of any reproductive organ is called vegetative propagation or vegetative reproduction.
For example, Ginger (rhizome) this plants reproduces with the help of its underground stem.
i)Different stages of crop production
Ploughing. The loosening of soil for sowing of seed is called ploughing.
Sowing. Scattering of seeds into the soil is called sowing.
Adding fertilizers. Seeds require nutrients for proper growth. ...
Irrigation. Watering of plants is called irrigation.
Protection.
Harvesting.