Question

trite detailed answers of the following questions:
How higher plants stand erect in air and their soft organs rem
firm?
What is secondary growth and what is the significance of secon
growth?
Describe various types of skeletons found in animals. Discuss
advantages and disadvantages of each type.
What is a joint? Name different types of joints found in vertebrate
How many bones a human skeleton has? Describe the position
function of important bones.
What is a skeletal muscle? Describe the structure of a sk
muscle.
What are antagonistic muscles? Name the different sets of
muscles. How do they move the shoulder joint in all the direction
Describe the various modes of locomotion in protozoan protocti
How does a jelly fish, an earthworm and a star fish move?​

Answer 1

Answer:1.The plants are mostly negative geotropic and positive photo tropic because of the Phytohormones or popularly known as plant hormones in them. Due to this feature higher plants stand erect in air and their soft organs remain firm. ... All the roots are positive geotropic in nature

2.Image result for What is secondary growth and what is the significance of second growth

In botany, secondary growth is the growth that results from cell division in the cambia or lateral meristems and that causes the stems and roots to thicken, while primary growth is growth that occurs as a result of cell division at the tips of stems and roots, causing them to elongate, and gives rise to primary tissue.

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