Which of the following kidney stone are most common?

1. 1. Uric acid
   2. Calcium phosphate
   3. Calcium oxalate
   4. All of these

Centric discoid form of diatoms is_____.

1. 1. Coscinodiscus
   2. Camphyloneiscus
   3. Stephanotis
   4. Diplaneis

Which of the following bacteria do not have flagella commonly_____.

1. 1. Vibrio
   2. Streptobacilli
   3. Cocci
   4. Bacilli

Most cell membranes are composed principally of ?

1. 1. Protein and Chitin
   2. DNA ad protein
   3. Protein and Lipids
   4. Protein and RNA

Which of the following endoplasmic reticulum has no ribosome on its surface?

1. 1. rough
   2. smooth
   3. both
   4. None of these

Vocal cords are stretched across_____.

1. 1. Pharynx
   2. Glottis
   3. Larynx
   4. All of these

The carotid arteries are in the _____ of the human body.

1. 1. Elbow
   2. Neck
   3. Wrist
   4. Brain

Due to which property of Adiantum and example of Filicinae is called Maidenhairfern?

1. 1. Shows heteromorphic alternation of generation
   2. Stipe (stalk) and rachis of leaf have black smooth and shiny hair like structures
   3. Fibrous adventituous roots arise from the lower side of rhizome
   4. Its short thick branched horizontally growing rhizome

Which of the following structure has been formed or modified from gill pouches in humans?

1. 1. Gills
   2. Lungs
   3. Middle ear
   4. Eustachian tube

Who was first to propose an objective definition of instinct?

1. 1. Kohler
   2. Thorpe
   3. Pavlov
   4. Darwin