Biology : PU-CET (U.G) 2015 Panjab University Entrance Exam With Answers

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22.

Plants Which Prefer Extreme Sunlight Are Called :

A: Halophytes
B: Heliophytes
C: Sciophytes
D: Xerophytes

The answer is: B

Explanation

Plants which prefer extreme sunlight are called "Heliophytes". Heliophytes are plants that are adapted to grow in full sunlight and are capable of withstanding high levels of solar radiation. These plants have specialized structures, such as thick waxy leaves, to protect themselves from the harmful effects of intense sunlight and ultraviolet radiation. Examples of heliophytes include cacti, succulents, and sunflowers.

Halophytes : These are plants that can tolerate high levels of salt in the soil or water around them. They are typically found in coastal areas or salt flats, where the soil is too saline for most other plants to grow. Examples of halophytes include mangroves, salt marsh grasses, and pickleweed.

Sciophytes: These are plants that prefer shade or low levels of light. They are adapted to grow in areas with limited sunlight, such as the forest understory. Examples of sciophytes include ferns, mosses, and some species of wildflowers.

Xerophytes: These are plants that are adapted to grow in dry conditions with limited water availability. They have specialized structures, such as thick leaves or water-storing tissues, to help them conserve water. Examples of xerophytes include cacti, succulents, and some species of grasses.