NEET 2010 PYQ Mock Test

Which two of the following changes usually occur in plain dwellers when they move to high altitudes ($3,500\text{m}$ or more)?(a) Increase in red blood cell size(b) Increase in red blood cell production(c) Increased breathing rate(d) Increase in thrombocyte count

$\text{dB}$ is a standard abbreviation used for the quantitative expression of:

Study the four statements ($\text{a-d}$) and select the two correct ones:(a) A lion eating a deer and a sparrow feeding on grain are ecologically similar in being consumers.(b) Predator star fish Pisaster helps in maintaining species diversity of some invertebrates.(c) Predators ultimately lead to the extinction of prey species.(d) Production of chemicals such as nicotine by plants are metabolic disorders.

The figure given below is a diagrammatic representation of response of organisms to abiotic factors. What do $a,b$ and $c$ represent respectively?

Widal test is used for the diagnosis of: