Biology - Online Test
Q1. Identify the figure given below:
Answer : Option C
Explaination / Solution:
The figure is identified as salivary gland. It is multicellular and is lined with glandular epithelium cells. These types of cells are specialized in production and release of particular kind of digestive juices or sweat or oil. Salivary gland secretes alkaline fluid called saliva.
Q2. First phylogenetic system of classification was given by
Answer : Option C
Explaination / Solution:
First phylogenetic system of classification was given by Engler and Prantl which was based on evolutionary relationship of the organisms. Those evolved earlier are classified first and newly evolved later on.
Q3. Hormone which acts on hypothalamus to decrease food intake, stimulate satiety and increase energy output is :
Answer : Option D
Explaination / Solution:
Leptin hormone acts on hypothalamus to decrease food intake, stimulate satiety and increase energy output. Leptin hormone is made by adipose cells.
Q4. Adipose tissues in whales and dolphins help in
Answer : Option A
Explaination / Solution:
Adipose tissues in whales and dolphins help in thermoregulation. Adipose tissue stores fats that help maintaining temperature of the body. Fat acts as insulator that maintains constant temperature of the body.
Q5. Element involved in the synthesis of cell wall and storage material are called
Answer : Option D
Explaination / Solution:
Those minerals that are involve in the synthesis of cell wall and storage material are called framework element. Calcium, Magnesium, Carbon includes framework elements.
Q6.
Read the following statements :
i. Opening of hepato-pancreatic duct into jejunum is guarded by Sphincter of Oddi.
ii. Duodenum receives bile-pancreatic duct.
Answer : Option A
Explaination / Solution:
Duodenum receives bile from pancreatic duct. Bile contains bile juice that contain bile salt used for emulsification of fat. Sphincter of Oddi is not present between hepatic-pancreatic duct into jejunum.
Q7. The immunoglobulin abundant in colostrum is
Answer : Option C
Explaination / Solution:
Colostrum is the milk secreted by pregnant female after the delivery of baby. This milk contains immunoglobulin IgA that provide immunity to baby from several diseases.
Q8. Label the arrows in the given diagram of brain from top to bottom :
Answer : Option B
Explaination / Solution:
The part of human brain shown above has marked as cerebellum, pons and medulla oblongata of hind brain.
Q9. Largest unicellular organism is
Answer : Option A
Explaination / Solution:
Acetabularia is a genus of green algae, specially of Polyphysaceae family. It is the largest unicellular organism.
Q10. In certain bacteria, the glycocalyx is forms into loose sheath layer is called as
Answer : Option A
Explaination / Solution:
Glycocalyx differs in composition and thickness among different bacteria. It could be a loose sheath called the slime layer in some, while in others it may be thick and tough called the capsule. The cell wall determines the shape of the cell and provides a strong structural support.
