Biology - Comprehensive Mock Test 69

Question 681 Medium

A change in the amount of yolk and its distribution in the egg will affect?

A) Fertilization B) Formation of zygote C) Pattern of cleavage D) Number of blastomeres produced

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Question 682 Easy

A bivalent consists of ?

A) Two chromatids and one centromere B) Four chromatids and two centromeres C) Two chromatids and two centromeres D) Four chromatids and four centromeres

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Question 683 Medium

During oogenesis the cell that is fertilized by a sperm to become an egg is ?

A) primary spermatocyte B) secondary oocyte C) primary oocyte D) secondary spermatocyte

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Question 684 Medium

______ are devoid of respiratory, excretory and circulatory organs?

A) Threadworms B) Sponges C) Tapeworms D) Liver fluke

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Question 685 Medium

Which one of the followings in birds indicates their reptilian ancestry?

A) Eggs with a calcareous shell B) Scales on their hind limbs C) Four-chambered heart D) Two special chambers crop and gizzard in their digestive tract

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Question 686 Medium

Animals having a built in thermostat to maintain constant body temperature are known as ?

A) Biothermic B) Poikilothermic C) Oligothermic D) Homeothermic

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Question 687 Easy

Swarming generally occurs in ?

A) Pyrilla B) Mosquito C) House fly D) Locust

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Question 688 Easy

Cell tissue grade of organization occurs in ?

A) Platyhelminthes B) Sponges C) Protozoa D) Coelenterata

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Question 689 Easy

Water-Vascular’ system is found in ?

A) Sea-anemone B) Sea-pen C) Sea-cucumber D) Sea-horse

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Question 690 Easy

The scientific name of Asian tiger mosquito ?

A) Aedes aegypti B) Aedes albopictus C) Aedes taeniorhynchus D) Aedes albolineatus

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