The function of copper ions in copper releasing IUDs is to

1.	inhibit gametogenesis
2.	make uterus unsuitable for implantation
3.	inhibit ovulation
4.	suppress sperm motility and fertilizing capacity of sperms

Which of the following in sewage treatment removes suspended solids?

1. Secondary treatment

2. Primary treatment

3. Sludge treatment

4. Tertiary treatment

An important characteristic that Hemichordates share with Chordates is:

The final proof for DNA as the genetic material came from the experiments of:

1. Hershey and chase

2. Avery, McLeod and McCarty

3. Har Gobind Khorana

4. Griffith

Among the following characters, which one was not considered by Mendel in his experiments on pea?

1. Trichomes-Gladular or non-gladular

2. Seed-green or yellow

3. Pod-inflated or constricted

4. Stem-Tall or Dwarf

Plants which produce characteristic pneumatophores and show vivipary belong to:

1. Halophytes

2. Psammophytes

3. Hydrophytes

4. Mesophytes

The pivot joint between atlas and axis is a type of:

With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct?

DNA fragments are:

1. Negatively charged

2. Neutral

3. Either positively charged depending on their size

4. Positively charged

Which of the following components provides sticky character to the bacterial cell?

1. Nuclear membrane

2. Plasma membrane

3. Glycocalyx

4. Cell Wall