Biology - Online Test
Q1.
Match the following :
Animal
a) Dugesia
b) Palaemon
c) Palamnaeus
d) Sea anemone
Excretory organ
i) body surface
ii) malpighian tubules
iii)protonephridia
iv) green glands
Answer : Option C
Explaination / Solution:
Excretory system of Dugesia is protonephridia, Palaemon is body surface, Palamnaeus is malpighian tubules and that of Sea anemone is body surface.
Q2. Select the correct statement from the following:
Answer : Option B
Explaination / Solution:
In organic evolution, fitness is the end result of the ability to adapt and gets selected by nature. Darwinian variations are small and directional. Mutation is sudden change in gene and all mammals have vertebrae.
Q3. Scientific study of diversity of organism and their evolutionary relationship is called
Answer : Option D
Explaination / Solution:
Systematics is the scientific study of diversity of organism and their evolutionary relationship. Systematics is also known as taxonomy. It includes identification, nomenclature and classification.
Q4. Tyloses are balloon-like ingrowths in vessels developing from
Answer : Option D
Explaination / Solution:
Tyloses are balloon like in ingrowths in vessels developing from parenchyma cells through the pits of vessel wall of xylem of secondary heartwood.
Q5. Parenchymatous cushion present inside the ovary, where ovules are borne is called
Answer : Option D
Explaination / Solution:
Placenta is the parenchymatous cushion present inside the ovary, ovules are borne. Ovules are attached with ovary at placenta to get nourishment.
Q6. How many numbers of gibberellins are distributed in different organisms?
Answer : Option C
Explaination / Solution:
There are more than 100 gibberellins reported from widely different organisms such as fungi and higher plants. They are denoted as GA1, GA2, GA3 and so on.
Q7. Which of the following may cause algal blooms in the aquatic system:
Answer : Option C
Explaination / Solution:
Algal bloom is rapid increase in population of algae is a water system. This is caused due to excess of nutrients like phosphorus and nitrogen in the water bodies.
Q8.
A 5 year old girl Sita and her grandmother, together met an accident. Her grandmother got her leg fractured but Sita didn’t suffer from any fractures :
i. At young age bones are more flexible and contain lots of organic matter.
ii. Sita’s has a more powerful immune system than her grandmother.
iii. In old people bones become hard and brittle.
Answer : Option B
Explaination / Solution:
Generally bones are flexible at young age and become hard and brittle at old age.
Q9. Expand GEAC
Answer : Option A
Explaination / Solution:
The Genetic Engineering Approval Committee (GEAC) is the apex body constituted in the Ministry of Environment and Forests under 'Rules for Manufacture, Use, Import, Export and Storage of Hazardous Microorganisms/Genetically Engineered Organisms or Cells 1989', under the Environment Protection Act, 1986.
Q10. The function of copper-T is to prevent
Answer : Option C
Explaination / Solution:
Copper-T is an intra-uterine device that is used by female to avoid unwanted pregnancy. This device prevents implantation and decrease the motility of sperm by releasing copper ions.
