In pteridophytes, phloem is without
bast fibers
Sieve tubes
Companion cells
Sieve cells
C.
Companion cells
In angiosperm, companion cells are living cells along with sieve tube and phloem parenchyma of the phloem. In pteridophytes and gymnosperm, phloem is without companion cell.
Match the following entities of column I with their respective orders of column II and choose the correct combination form the option.
Column I | Column II |
A. Wheat | 1. Primate |
B. Mango | 2. Diptera |
C. Housefly | 3. Sapindales |
D. Man | 4. Poales |
A | B | C | D |
4 | 3 | 2 | 1 |
A | B | C | D |
1 | 2 | 4 | 3 |
A | B | C | D |
3 | 4 | 2 | 1 |
A | B | C | D |
2 | 4 | 1 | 3 |
Lactose is composed of
Glucose + Glucose
Glucose + Galactose
Glucose + Fructose
Fructose + Galactose
Meiosis is best observed in dividing
Cell of lateral meristem
Cells of apical meristem
Microsporocytes
Microspores and anther wall
Study the following statements and select the correct option.
I. Tapetum nourishes the developing pollen grains.
II. Hilum represents the junction between ovule and funicle.
III. In aquatic plants such as water hyacinth and water lily, pollination is by water.
IV. The primary endosperm nucleus is triploid.
I, II, and IV are correct, but III is incorrect
I and II are correct, but III and IV are incorrect
I and IV are correct, but II and III are incorrect
I, Ill and IV are correct, but I is incorrect