Structural Organisation in Animals - Online Test
Q1. The winter sleep in frog is called
Answer : Option C
Explaination / Solution:
During extreme heat and cold period, frog takes shelter in deep burrows to protect them from extreme environmental conditions. This is called as summer sleep (aestivation) and winter sleep (hibernation).
Q2. The correct order of digestive system of frog is
Answer : Option A
Explaination / Solution:
The digestive system of frog begins from the mouth which opens into the buccal cavity that leads to the oesophagus through pharynx. Oesophagus is a short tube that opens into the stomach which in turn continues as the intestine and then rectum. The rectum finally opens outside by the cloaca through cloacal aperture.
Q3. The number of nymphs produced from single ootheca of frog is
Answer : Option A
Explaination / Solution:
Young ones of frogs are called nymphs. When the ootheca ruptures, 16 nymphs come out.
Q4.
Match the following with reference to frog
Column I
a) Medulla oblongata
b) Smell
c) Touch
d) Cranial nerves
Column II
i) Sensory papillae
ii) PNS
iii) Foramen magnum
iv) Nasal epithelium
Answer : Option B
Explaination / Solution:
The medulla oblongata passes out through the foramen magnum and continues into spinal cord, which is enclosed in the vertebral column. Frog has different types of sense organs. This includes organs of touch (sensory papillae) and smell (nasal epithelium). The nervous system is organized into a central nervous system including brain and spinal cord and peripheral nervous system (PNS) including cranial and spinal nerves.
Q5. Blood plasma contains ----------------- % water.
Answer : Option B
Explaination / Solution:
Blood consists of blood plasma, formed cells ( RBC, WBC, Platelets) along with sugar, proteins etc. Blood plasma contains about 90% water with a number of salts and few circulating hormones.
