The largest and most diverse phylum in the animal kingdom is:
A. Arthropoda
B. Mollusca
C. Annelida
D. Chordata
Answer: Option A
Solution (By JKSSB Mock Tests)
Arthropoda is the largest phylum, with over a million described species, including insects, arachnids, crustaceans, and myriapods. They are characterized by jointed appendages, chitinous exoskeleton, and segmented bodies. Insects alone represent the majority of animal species. Chordata is comparatively smaller.
Explanation:
The gall bladder is a small sac under the liver that stores and concentrates bile produced by the liver, releasing it into the duodenum when needed for fat digestion. The liver makes bile, pancreas produces digestive enzymes, duodenum is the entry point.
Explanation:
Folic acid prevents neural tube defects like spina bifida. It is recommended during early pregnancy. B₁₂ is for DNA synthesis, D for bone, K for clotting.
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