Biology questions
20584 published questions with worked solutions.
- What causes a green plant exposed to the light on only one side, to bend toward the source of light as it grows ?
- Nuclear envelope is a derivative of :-
- Select the correct option :- I (a) Synapsis aligns homologous chromosomes (b) Synthesis of RNA and protein (c) Action of enzyme...
- Keel is the characteristic feature of flower of :-
- Perigynous flowers are found in :-
- A chemical signal that has both endocrine and neural roles is ?
- Hysterectomy is surgical removal of :
- Removal of proximal convoluted tubule from the nephron will result in:
- A major characteristic of the monocot root is the presence of :
- Which of the following cells during gametogenesis is normally diploid?
- The structures that are formed by stacking of organized flattened membranous sacs in the chloroplasts are :
- Vertical distribution of different species occupying different levels in a biotic community is known as:
- The mass of living material at a trophic level at a particular time is called :
- Which of the following animals is not viviparous?
- In an ecosystem the rate of production of organic matter during photosynthesis is termed as:
- Erythropoiesis starts in :
- Which is the most common mechanism of genetic variation in the population of sexually reproducing organism?
- Blood pressure in the mammalian aorta is maximum during :
- When you hold your breath, which of the following gas changes in blood would first lead to the urge to breathe?
- Vascular bundles in monocotyledons are considered closed because: