Multiple Choice QuestionsChondrichthyes is characterised by
Placoid scale
Placoid scale and ventral mouth
Ventral mouth
Ctenoid scale and ventral mouth
B.
Placoid scale and ventral mouth
Chodrichthyes (cartilaginous fishes) are marine. Their mouth is ventral and they have cartilaginous endoskeleton. Dermal placoid scales are present, e.g. Scoliodon, Pristis, etc.
Match the following and select the correct option.
| List I | List II |
| A. Cyclostomes | 1. Hemichordata |
| B. Ayes | 2. Urochordata |
| C. Tunicates | 3. Agantha |
| D. Balanoglossus | 4. Pisces |
| E. Osteichthyes | 5. Tetrapod |
| A | B | C | D | E |
| 3 | 5 | 2 | 1 | 4 |
| A | B | C | D | E |
| 3 | 1 | 5 | 2 | 4 |
| A | B | C | D | E |
| 1 | 2 | 3 | 4 | 5 |
| A | B | C | D | E |
| 2 | 3 | 4 | 1 | 5 |
A.
| A | B | C | D | E |
| 3 | 5 | 2 | 1 | 4 |
Which is substitution of mitochondria in E. colt?
Golgi body
Mesosome
Ribosome
Glyoxysomes
C.
Ribosome
Mesosomes will be equivalent to mitochondria of eukaryotes because of respiratory enzyme present in aerobic bacteria.
Which of the following organelles does not contain RNA?
Plasmalemma
Ribosome
Chromosome
Nucleolus
A.
Plasmalemma
The plasmalemma series as the interface between the machinery in the interior of the cell and the Extracellular Fluid. (ECF) that bathes all cells. It is devoid of the ribosome.
Which of the following cells in earthworm play a role similar to liver in vertebrates?
Amoebocytes
Mucocytes
Chloragogen cells
Epidermal cells
C.
Chloragogen cells
Chlorogogen cells are excretory in function. The chlorogogen cells take up excretory matter from the blood capillaries of the gut and from the coelomic fluid of the coelom. They also store glycogen and fat. So, these cells are analogous to the liver of vertebrates.
Which of the given option is correct regarding the statements?
Statement I:Cephalochordata bears notochord all along the body throughout life.
Statements II:Urochordate bears vertebral column only in the tail region throughout the life.
I wrong, II correct
I correct, II wrong
Both I and II are wrong
Both are correct
B.
I correct, II wrong
Cephalochordate has notochord all along the body through out life. But urochordates have a notochord in the tail region in their larval stage only.
In which of the following haemocyanin pigment is found?
Lower invertebrates
Echinodermata
Insecta
Annelida
A.
Lower invertebrates
In molluscs, the blood is colourless, often having copper containing blue respiratory pigment called haemocyanin.
Dutrochet has given the concept about cell in
1834
1814
1822
1824
D.
1824
In 1824, Pene Dutrochet, a French scientist wrote that all animal and plant tissues were aggregate of globular cells.
Notochord originates from
Mesoderm
Ectoderm
Endoderm
None of these
A.
Mesoderm
Notochord originates from mesoderm germ layer.
Animal cell differ from plant cell in possessing
Vacuoles
Centrosomes
Pastids
Mitochondria
B.
Centrosomes
The centrosome is a self-propagating cytoplasmic organelle located near the nucleus of an animal cell.
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