Which one of the following statements is wrong?
1. | Algae increase the level of dissolved oxygen in the immediate environment |
2. | Algin is obtained from red algae and carrageenan from brown algae |
3. | Agar-agar is obtained from Gelidium and Gracilaria |
4. | Laminaria and Sargassum are used as food |
The term 'polyadelphous' is related to?
1. gynoecium
2. androecium
3. corolla
4. calyx
How many plants among Indigofera, Sesbania, Salvia, Allium, Aloe, mustard, groundnut, radish, gram and turnip have stamens with different lengths in their flowers?
1. Three
2. Four
3. Five
4. Six
Radial symmetry is found in the flowers of?
1. Brassica
2. Trifolium
3. Pisum
4. Cassia
Free-central placentation is found in?
1. Dianthus
2. Argemone
3. Brassica
4. Citrus
Cortex is the region found between?
1. epidermis and stele
2. pericycle and endodermis
3. endodermis and pith
4. endodermis and vascular bundle
The balloon-shaped structures called tyloses:
1. originate in the lumen of vessels
2. characterise the sapwood
3. are extensions of xylem parenchyma cells into vessels
4. are linked to the ascent of sap through xylem vessels
A non-proteinaceous enzyme is:
1. lysozyme
2. ribozyme
3. ligase
4. deoxyribonuclease
Select the mismatch:
Column I | Column II | |
1. | Gas vacuoles | Green bacteria Cells |
2. | Large central vacuoles | Animal cells |
3. | Protists | Eukaryotes |
4. | Methanogens | Prokaryotes |
Select the wrong statement:
1. | Bacterial cell wall is made up of peptidoglycan |
2. | Pili and fimbriae are mainly involved in the motility of bacterial cells |
3. | Cyanobacteria lack flagellated cells |
4. | Mycoplasma is a wall-less microorganism |