1. The anterior transparent part of eye. A) cornea B) iris C)sclera D) choroid 2
ID: 276490 • Letter: 1
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1. The anterior transparent part of eye. A) cornea B) iris C)sclera D) choroid 2. Amniotic egg was evolved first in A) fishes B) amphibians C) reptiles D) mammals 3. A net like nervous system is present in A) Planaria B) Hydra C)Sponge D) Earthworm 4. Malpighian tubules are excretory organs present in A) annelids B) insects C) flat worms D) echinoderms An interspecific interaction neutral to one and useful to other species A) competition B) predation C) commensalism D) mutualism The hollow ball of cells with inner mass is A) Blastula B) blastocyst C) gastrula D) morula Sewage and fertilizer runoffs result in rapid growth of cyanobacteria and algae called A) symbiosis B) eutrophication C)stratification Increase of DDT in great lakes food web is A) symbiosis B) eutrophication C) stratification D) biomagnification 5. 6. 7. D) biomagnification 8. 9. Fertilization takes place in A) ovary B) oviduct C)uterus D) vagina 10. The part of brain, regulates balance A) medulla B) cerebrum C) limbic system D) cerebellum 11. The study of vital statistics of populations and how they change over time is A) life table B) survivorship curves C) demography D) ecological nicheExplanation / Answer
1. The cornea is the windshield of the eye, which is the transparent anterior part of the eye.
Choroid is the vascular layer of the eye. The white outer layer is the sclera. The iris is the thin circular structure of the eye.
2. The first amniotic egg was evolved in the basal amniotes. These resembled small lizards and reptiliomorphs.
3. Net like nervous system is present in cnidarians, Organisms belonging to this class are Hydra, jelly fishes, and sea anemones.
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