Biology questions
20584 published questions with worked solutions.
- Given below are two statements : Statement I : Plasmids are autonomously replicating DNA. Statement II : Plasmids are...
- For a person with blood group 'O', which of the following is **not** a possible combination of parents' blood group genotypes?
- The covering of ovum at ovulation is _____.
- Match List-I with List-II. List-I A. Both species are harmed B. One species is harmed and the other is benefited C. Both species...
- Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : In an...
- Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : In...
- Which of the following statements are **Correct** ? (a) Energy flow from producers to consumers is unidirectional (b) Energy...
- Match List-I with List-II. List-I A. Transformation B. Cloning site C. Selection D. Ori List-II I. Restriction enzyme II....
- Meristematic tissue are
- In stem, the xylem is
- Interxylary as well as intraxylary phloem is present in
- G H Shull observed inbreeding depression in a plant. Miller and Letham isolated a hormone from the immature seeds of that plant....
- Quiescent centre is found in plants at
- Match the following columns and choose the correct combination. Column-I: (A) Endodermis, (B) Stomata, (C) Sieve tube, (D)...
- This is a specialised tissue found in the mesophyll of Cycas and Pinus leaves.
- From evolutionary point of view, tracheids and sieve cells are more primitive than tracheae and sieve tubes respectively. The...
- Viral infection is usually absent in
- The cells without nuclei are present in
- Axillary bud and terminal bud are derived from the activity of
- A leaf primordium grows into adult leaf lamina