Which of the following is an example of a heterotrophic plant? MCQ with Answer and Explanation

Question
Which of the following is an example of a heterotrophic plant?
A. Neem
B. Cuscuta
C. Sunflower
D. Mango
Answer: Option B
Solution (By JKExamLibrary)
Cuscuta (dodder) is a parasitic plant that lacks chlorophyll and derives nutrients from the host plant through haustoria. It is a total stem parasite. Mango, neem, and sunflower are autotrophic plants performing photosynthesis. Heterotrophic plants include parasites (Cuscuta, Rafflesia) and saprophytes (Monotropa).
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Question #1
Which of the following statements about the cell cycle is correct?
A. DNA replication occurs during the G2 phase.
B. Mitosis is the longest phase of the cell cycle.
C. The S phase is when DNA synthesis occurs.
D. Cytokinesis occurs before prophase.
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Correct Answer: Option C

Explanation:
In the S (synthesis) phase of interphase, DNA is replicated. G2 is preparation for mitosis. Interphase is the longest. Cytokinesis follows telophase.
This question belongs to: Science Biology
Question #2
The hormone that promotes the development of the mammary glands during pregnancy is:
A. Oxytocin
B. Progesterone
C. Estrogen
D. Prolactin
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Correct Answer: Option B

Explanation:
Progesterone stimulates the development of alveolar tissue of the breasts during pregnancy. Estrogen promotes duct development. Prolactin initiates milk synthesis, oxytocin ejection.
This question belongs to: Science Biology
Question #3
Which component of blood plays a crucial role in blood clotting?
A. Red blood cells
B. White blood cells
C. Platelets
D. Plasma proteins (albumin)
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Correct Answer: Option C

Explanation:
Platelets (thrombocytes) are small, anucleate cell fragments that adhere to the site of injury, release clotting factors, and aggregate to form a platelet plug, initiating the coagulation cascade. RBCs transport oxygen, WBCs defend against infection, and plasma proteins like albumin maintain osmotic balance. Clotting factors are also present in plasma, but platelets are the primary cellular component.
This question belongs to: Science Biology
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