Which one of the following kinds of animals are triploblastic?
1. Flatworms
2. Sponges
3. Ctenophores
4. Corals
Which one of the following statements about certain given animals is correct?
1. Roundworms (Aschelminthes) are pseudocoelomates.
2. Mollusks are acoelomates.
3. Insects are pseudocoelomates.
4. Flatworms (Platyhelminthes) are coelomates.
Copper ions released from copper-releasing Intra Uterine Devices (IUDs):
1. make uterus unsuitable for implantation
2. increase phagocytosis of sperms
3. suppress sperm motility
4. prevent ovulation
The energy-releasing metabolic process in which substrate is oxidized without an external electron acceptor is called:
1. glycolysis
2. fermentation
3. aerobic respiration
4. photorespiration
Restriction endonucleases are enzymes which:
| 1. | make cuts at specific positions within the DNA molecule |
| 2. | recognize a specific nucleotide sequence for binding of DNA ligase |
| 3. | restrict the action of the enzyme DNA polymerase |
| 4. | remove nucleotides from the ends of the DNA molecule |
Which one of the following is not a lateral meristem?
1. Intrafascicular cambium
2. Interfascicular cambium
3. Phellogen
4. Intercalary meristem
C4-plants are more efficient in photosynthesis than C3-plants due to:
| 1. | higher leaf area |
| 2. | presence of larger number of chloroplasts in the leaf cells |
| 3. | presence of thin cuticle |
| 4. | lower rate of photorespiration |
Alage have cell wall made up of:
| 1. | Cellulose, galactans and mannans |
| 2. | Hemicellulose, pectins and proteins |
| 3. | Pectins, cellulose and proteins |
| 4. | Cellulose, hemicellulose and pectins |
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