Which of the following animal excrete nitrogenous waste mainly as uric acid??
A. Hydra
B. Planaria.
C. Humans
D. Birds.
Category: Biology Mcqs
Which one of the following forms the blk of exoskeleton of an arthropod??
A. Epicuticle
B. Procuticle
C. Ectocuticle
D. None of these
Megaphylls i.e. leaves with divided veins with an expanded lamina is a dharacteristic of ___________________??
A. Lycopods
B. Ferns
C. Seed plants
D. Both b and c
Highest form of learning is__________________??
A. Latent learning
B. Insight learning
C. Operant conditioning
D. Instinct
which of the following is called protein synthesizing machine??
A. mitochondria
B. nucleus
C. chromosomes
D. ribosomes
Water is _________ times viscous than air??
A. 50
B. 1000
C. 5000
D. 8000
Which of the following is an example of the living member of Psilopsida________________??
A. Rhynia
B. Psilophyton
C. Psilotum
D. Cooksonia
In most birds air sacs are ____________ in number??
A. 10
B. 3
C. 4
D. 9
On average there are _______ or more thylakoid per granum??
A. 60
B. 50
C. 40
D. 70
Antherozoids the male gamete in bryophytes are attracted towards Archegonium i.e. female sex organ by____________??
A. Phototactic phenomenon
B. Chemotactic phenomenon
C. Geotropic phenomenon
D. Chemotropic movement
