The process of transfer of pollen from anther to stigma of the same flower is: MCQ with Answer and Explanation

The process of transfer of pollen from anther to stigma of the same flower is:
A. Self-pollination
B. Xenogamy
C. Cross-pollination
D. Geitonogamy
Answer: Option A
Solution (By JKExamLibrary)
Self-pollination (autogamy) occurs within the same flower. Geitonogamy is pollination between different flowers of the same plant, functionally cross-pollination. Xenogamy is between different plants. Self-pollination leads to genetic uniformity.

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Practice More Biology Questions

Question #1
The type of muscle tissue present in the walls of blood vessels and intestine is:
A. Voluntary muscle
B. Smooth muscle
C. Skeletal muscle
D. Cardiac muscle

Correct Answer: Option B


Explanation:
Smooth muscle is non-striated, spindle-shaped, involuntary muscle found in the walls of hollow organs like intestines, blood vessels, uterus, and bladder. It controls peristalsis, vasoconstriction, and other autonomic functions. Skeletal muscle is voluntary and striated, cardiac muscle is striated but involuntary.

This question belongs to: Science Biology
Question #2
Consider statements about human physiology: 1. The hypothalamus regulates body temperature. 2. The cerebellum controls voluntary muscle coordination. 3. The medulla controls reflex actions like swallowing. Which are correct?
A. 1 and 3 only
B. 1, 2 and 3
C. 2 and 3 only
D. 1 and 2 only

Correct Answer: Option B


Explanation:
The hypothalamus is the primary thermoregulatory center, maintaining body temperature through sweating or shivering. The cerebellum coordinates voluntary movements, ensuring smooth and accurate muscle activity and balance. The medulla oblongata contains vital reflex centers controlling involuntary actions such as swallowing, coughing, sneezing, and vomiting. All three statements are anatomically and physiologically correct.

This question belongs to: Science Biology
Question #3
Consider statements about photosynthesis: 1. Light reactions occur in the grana. 2. The Calvin cycle occurs in the stroma. 3. Oxygen is released from CO2. Which are correct?
A. 1 and 2 only
B. 1, 2 and 3
C. 2 and 3 only
D. 1 and 3 only

Correct Answer: Option A


Explanation:
Photosynthesis consists of light-dependent reactions occurring in the thylakoid membranes (grana) where water is split, releasing oxygen, and light-independent reactions (Calvin cycle) occurring in the stroma where CO2 is fixed. The oxygen released during photosynthesis comes from the photolysis of water, not from carbon dioxide. Thus, statements 1 and 2 are correct.

This question belongs to: Science Biology