Biology - Online Test
Q1. The graphical representation of the total growth against time is called
Answer : Option B
Explaination / Solution:
A growth curve is an empirical model of the evolution of a quantity over time or a graphical representation of how a particular quantity increases over time.
Growth curves are used in statistics to determine the type of growth pattern of the quantity - be it linear, exponential or cubic.
It is also known as Sigmoid curve.
Q2. Living organism show internal growth due to addition of materials and formation of cells inside the body. Such a method is called
Answer : Option D
Explaination / Solution:
The method in which living organism show internal growth due to addition of materials fand formation of cells inside the body is called intussusception.
Q3. Which type of vegetative propagation is present in bamboo
Answer : Option A
Explaination / Solution:
Sucker is underground shoot that some stage emerges above the soil surface and gives rise to a new plant. It is initially nourished by parent plant but later become independent.
Q4. The product of ecosystem processes are called as
Answer : Option A
Explaination / Solution:
The products of ecosystem processes are called as ecosystem services. Ecosystem services includes purification of air and water by forests and soil formation as well as nutrient cycles
Q5. Development of fruit without fertilization is called
Answer : Option D
Explaination / Solution:
Fruit formation without fertilisation results into seedless fruit. Parthenogenesis is development of new individual from unfertilised eggs. Parthenocarpy can be induced artificially using plant hormone auxin.
Q6. The value of ecosystem services of biodiversity is
Answer : Option D
Explaination / Solution:
The value of ecosystem services of biodiversity is difficult to determine as it includes services like cultural and spiritual value along with life saving services for all organisms.
Q7. Which of the following is not a part of coxal bone?
Answer : Option A
Explaination / Solution:
The coxal bone (hip bone, pelvic bone) is a large, flattened, irregularly shaped bone, constricted in the center and expanded above and below.
It consists of three parts, the ilium, ischium, and pubis, which are distinct from each other in the young subject, but are fused in the adult.
Q8. Human protein α-1-antitrypsin is used to treat
Answer : Option D
Explaination / Solution:
Transgenic organisms produce useful biological products. Augmentation therapy is the use of alpha-1 antitrypsin protein (AAT) from the blood plasma of healthy human donors to augment (increase) the alpha-1 levels circulating in the blood and lungs of Alphas diagnosed with emphysema.
Human protein α-1-antitrypsin is used to treat emphysema is also obtained from transgenic animal.
Q9. The period between entry of pathogen into the body and appearance of first symptom is called
Answer : Option A
Explaination / Solution:
The period between entry of pathogen into the body and appearance of first symptom is called incubation period. It varies from a few days up to 7 years as in case of AIDS.
Q10. Which one is not shown by plasmolysis
Answer : Option A
Explaination / Solution:
Plasmolysis is the shrinking of cell membrane due to exosmosis. Plasmolysis shows that cell membrane is semipermeable and elastic but do not show that cell wall is semipermeable.
