Question 1.
a) Name the following:
i) The primary root with all its branches.
ii) The green, flat and broad part of the leaf.
iii) The second inner whorl of a flower.
iv) The covering of vacuole.
v) Four front teeth at the middle of each jaw.
b) Define the following terms:
i) Peristalsis, ii) Defaecation, iii) Sessile leaves.
Answer all the questions ..
Answers
Answer:
ii)lamina
iv)tonoplast
v)incisors
A points
1) there are two basic types of root system in plants : taproot systems and fibrous roots systems. Both are illustrated in figure below. Taproot systems feature a single, thickprimary root, called tge taproot, with smaller secondary roots growing out from the sides.
2) the green, flat and board part of leaf is called 'lamina' or 'leaf blade '.
3) the second whorl is comprised of petals- usually, brightly coloured- collectively called the corolla. The number of sepals and petals varies depending on weather the plant is a monocot dicot.
4) Also called the vacuolar membrane, the tonoplast is tge cytoplasmic membrane surrounding a vocuole, seperating the vocuolar contents from the cell's cytoplasm.
5) incisors: the four front teeth in both the upper and lower jaws are called incisors. Their primary in function is to cut food. The two incisors on either side of the midline are known as central incisors. The two adjacent to the central incisors are known as lateral incisors.
B points
1) peristalsis : peristalsis is radially symmetrical contractions and relexation of muscles that propagates in a wave down a tube, in an anterograde direction is called peristalsis.
2) Difaecation : Difaecation is the final act of digestion, by which organisms eliminate solid, semisolid, or liquid waste material from the digestive tract via the anus. Human expel feces with a frequency varying from a few times daily yo a few times weekly this is called is defacation.
3) Sessile leaves: in botany sessility ( meaning "sitting", used in the sense of "resting on the surface ") is a characteristics of plant parts that have no stalk. Flowers or leaves are borne directly from the stem or peduncle, and thus lack a peticole air pedicel...... Others examples of Sessile flowers include Achyranthus, saffron etc.
Thank you!