Biology questions
20584 published questions with worked solutions.
- Given below are two statements: Statement I : Ovulation is caused by LH surge leading to rupture of Graafian follicles. Statement...
- Which of the following are primary consumers in a food chain?
- A population of diploid organisms is at Hardy-Weinberg equilibrium. If the frequency of allele A is 0.1, the frequency of AA is...
- Match List-I with List-II. List-I (A) Excess growth hormone (B) Luteinizing hormone (C) Vasopressin (D) Oxytocin List-II (I)...
- Sponges exchange O_2 with CO_2 by _____.
- How many theca are present in each lobe of a typical bilobed angiosperm anther ?
- Muscle contraction is initiated by a signal sent by the central nervous system by the release of _____ .
- Which of the following statements about lac-operon is **correct**?
- Which of the following in female gametophyte of an angiosperm helps in guiding the pollen tube for fertilizing the eggs?
- Which of the following plant produces non-albuminous seeds?
- If the diploid chromosome number of typical angiosperm is 36, what would be the chromosome number in its endosperm?
- Which of the following statements about the reabsorption process in Henle's loop are **correct**? (a) The descending limb of...
- Which of the following is the **correct** order of arrangement of vertebrate column from the head to toe?
- Which of the following is **not** evidence for evolution?
- Given below are two statements : Statement I : Modern *Homo sapiens* arose in Australia and moved across continents. Statement II...
- Consider a population of 10 million cells. Given the per-capita birth rate of 0.002 (per unit time) and the per-capita death rate...
- Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : The logistic...
- Adaptive radiation in placental mammals and Australian Marsupials leading to similarity between distant species is an example of...
- Which of the following hormone is **not** secreted by human placenta?
- Which of the following enzymes synthesizes precursor mRNA?