Biology Today — December 2017
Epidermis Cambium Primary vascular bundle Secondary vascular bundle Ground tissue Cortex Cork Fig.: T.S. of stem of Dracaena (di ...
In dicot roots, the cork cambium originates from (a) pit (b) hypodermis (c) pericycle (d) endodermis. Some of the tree trunks a ...
Fascicular cambium separates the xylem and phloem in (a) dicots only (b) monocots only (c) both dicots and monocots (d) none o ...
ANSWER KEY New MCQs (d) 2. (b) 3. (c) 4. (d) 5. (b) (c) 7. (c) 8. (c) 9. (b) 10. (a) (d) 12. (a) 13. (d) 14. (c) 15. (b) Exam ...
Which of the following are present in the filiform papillae of the tongue? (a) Chemoreceptors (b) Thermoreceptors (c) Tactile r ...
Which of the statements given below are incorrect? I. Chronic obstructive pulmonary disease refers to coryza. II. Emphysema is ...
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In humans, which opening is guarded by sphincter of Oddi? (a) Opening of hepatopancreatic ampulla into duodenum (b) Opening of ...
Fig.: Multiple fission (a) Amoeba (b) Malarial parasite Cyst wallDaughter nuclei Pseudopodiospores Crypto merozoite Schizont Mer ...
EVOLUTION-I Analysis of various PMTs from 2013-2017 2013 2014 2015 2016 2017 AIPMT/NEET 2 2 1 4 AIIMS 1 2 2 AMU 4 ...
Theory of Biogenesis (a) Redi’s experiment: Francesco Redi (1668) cooked the flesh until no organisms were left alive and placed ...
Objections : Living matter cannot survive the extreme cold, dryness and intense radiations of interplanetary space. Moreover, t ...
Eukaryotes ↓ Cells with distinct nucleus and cell organelles. It is assumed that eukaryotic cells evolved from prokaryotic cells ...
EVOLUTION Evolution means an orderly change from one condition to another. It is believed that chemical evolution was replaced ...
This shows that heart in all the groups of vertebrates has same basic structural plan which proves their inter-relationship and ...
Ornithorhynchus (Duck billed platypus) and Tachyglossus (Spiny ant-eater) are egg laying mammals. These act as connecting links ...
(c) Vestigial organs in other animals are : Splint bones are vestigial 2nd and 4th digits of forelimb as well as hindlimb in ho ...
C. Biogeographical Evidences Biogeography is the pattern of distribution of animals and plants in different parts of the Earth. ...
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