Plants which perform photosynthesis by these parts:
a) Ribbon like roots
b) Fleshy cylindrical stem
c) Needle like stem
d) Flattened stem
Step 1: Analyzing each plant's photosynthetic adaptations.
Taeniophyllum has adapted its roots for photosynthesis, often found in orchids with minimal or no leaves. Euphorbia uses its thick, fleshy stems to perform photosynthesis, adapting to arid conditions. Casuarina, though typically known for its needle-like foliage, is often mistaken here; it’s included for its overall efficiency in photosynthesis under harsh conditions. Opuntia, with its flat stems called cladodes, efficiently performs photosynthesis.
Step 2: Confirming the correct option.
Considering the specialized parts used in photosynthesis by each plant listed, the third option aligns perfectly with their known biological adaptations.
Match the following:

Choose the correct pair from the following:

Identify A, B, C plants in a series based on these characters of roots:
A. Roots at lower nodes of stem
B. Roots absorb water and food from host plant
C. Root forming nodules
Find the correct statements regarding the structure of xylem and phloem:
I. Xylem parenchyma store starch or fat or Tannins
II. Xylem parenchyma have highly thickened walls and obliterated central lumens
III. Companion cells are controlled by nucleus of sieve tubes
IV. Phloem parenchyma is absent in most of the monocots
From the diagram answer the following:


Find incorrect statements related to water relations in plants:
A. Water potential difference is the drawing force for osmosis.
B. The driving force of diffusion is the concentration gradient.
C. Pressure potential is negative.
Assertion (A): Buds present in the axils of leaves are capable of forming a branch or a flower.
Reason (R): Axillary buds are constituted by the shoot apical meristems.