MCQ
In angiosperms embryosac is developed from
- ✓Megaspore mother cell
- BSecondary nucleus
- CEndothecium
- DMicrospore mother cell
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$II.$ The population growth rate $r$ is inversely related to generation time
$III.$ The housefly, which has a short life span and produces a large number of eggs, could be considered as a ' $K$ ' selected species
$IV.$ Under a particular set of selection pressures, organisms evolve towards the most efficient reproductive strategies
$V.$ Life history traits of organisms have evolved in relation to the constraints imposed by biotic and abiotic factors in their habitat Select the combination of correct statements
| A. Elephant | I. Respiration by lungs |
| B. Pigeon | II. Crop and gizzard |
| C. Viper | III. One ventricle |
| D. Balanoglossus | IV. Stomochord |