CBSE 11TH BIOLOGY - Online Test
Q1. The endoskeleton is fully ossified and the long bones are pneumatic in
Answer : Option A
Explaination / Solution:
Endoskeleton is fully ossified (bony) and the long bones are hollow with air cavities (pneumatic) in class aves.
Q2. Which is the most abundant chemical for the living organisms?
Answer : Option D
Explaination / Solution:
Water is the most abundant chemical for the living organisms.
In adult men, about 60% of their bodies are water.
Q3. Meghna suffers from allergic asthma. After a blood test her leucocyte count displayed an abnormal increase in the number of :
Answer : Option B
Explaination / Solution:
An absolute eosinophil count is a blood test that measures the number of white blood cells called eosinophils. Eosinophils become active when you have certain allergic diseases infections, and other medical conditions.
Q4. In mitochondria, protein accumulate in
Answer : Option B
Explaination / Solution:
In mitochondria, protein accumulate in intermembrane space between two layers of mitochondria.
Q5. In telophase I, which of the following event takes place?
Answer : Option C
Explaination / Solution:
In telophase I, the nuclear membrane and nucleolus reappear indicating the process of completion od nuclear division . Meiosis II is similar to mitosis.
Q6. Reema is on dialysis and she is unable to conceive due to high levels of waste products in her body fluids. Her doctor can suggest her
Answer : Option A
Explaination / Solution:
When both kidney of a person get damaged and not able to filter the blood, dialysis is used to remove nitrogenous wastes. High wastes accumulation unable a woman to conceive. The ultimate solution to this problem is kidney transplant.
Q7. The wall of fruit is called
Answer : Option A
Explaination / Solution:
Fruits are the mature ovary or ovaries of one or more flowers. In fleshy fruits, the outer layer (which is often edible) is the pericarp, which is the tissue that develops from the ovary wall of the flower and surrounds the seeds.
Q8. Lacunate collenchyma occurs in stem of
Answer : Option D
Explaination / Solution:
Lucinate collenchyma is very much alike to angular collenchyma but the cells are regularly arranged. Thickening occurs at theinner and outer tangential wall. It is found in cucurbita stem.
Q9. The housefly belong to order
Answer : Option D
Explaination / Solution:
Houseflies are insects of the order Diptera, the name being derived from the Greek di = two, and ptera = wings
Q10. Plant growth regulator that is used in delay in leaf senescence is
Answer : Option B
Explaination / Solution:
Cytokinins help overcome the apical dominance. They promote nutrient mobilisation which helps in the delay of leaf senescence.
