MCQ
In gymnosperm the roots are generally
- ARespiratory root
- BProp root
- ✓Tap root
- DAdventitious root
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| Column $I$ | Column $II$ |
| ($a$) Pituitary hormone | ($i$) Steroid |
| ($b$) Epinephrine | ($ii$) Neuropeptides |
| ($c$) Endorphins | ($iii$) Peptides, proteins |
| ($d$) Cortisol | ($iv$) Biogenic amines |
$(i)$ All living organisms have ability to respond the environment stimuli which could be physical, chemical or biological.
$(ii)$ Plants respond to external factors like light, water, temperature, other organisms, pollutants, etc.
$(iii)$ Photoperiod affects the process of reproduction.
$(iv)$ Human being is the only organism who has self consciousness.