Chapter 23, Problem 3STP

Summary Introduction

Introduction:

Anthophyta belongs to the category of seed plants. They are the flowering plants and are widely distributed as they are very adaptive and can grow in aquatic as well as the terrestrial environment. They are angiosperms and are observed after gymnosperm about 130 million years ago. Today more than 75 percent of plants are flowering plants. Most of the anthophytes are eudicots that include the shrubs, garden plants, and trees. Some plants like maples, sycamores, and oaks are anthophytes but have dicots.

Answer to Problem 3STP

Correct answer:

The correct answer is option (A) About 75 percent of all plants are anthophytes.

Explanation of Solution

Explanation/justification for the correct answer:

Option (A)About 75 percent of all plants are anthophytes. Anthophytes are angiosperms evolved after gymnosperm. They were discovered 130 million years ago after gymnosperm and today about 75 percent of plants are anthophytes.So, the correct answer is option (A).

Explanation for incorrect answer:

Option (B) Anthophytes do not require water to facilitate the fertilization of an egg.The requirement of water depends on the type of anthophytes life span. If they belong to perennial plants, they can survive in harsh conditions and can grow when the favorable condition returns.So, this is an incorrect option.

Option (C) Prehistoric tree-like ferns were the main coal forming plants. The anthophytes include many plants from a small shrub to trees.So, this is an incorrect answer.

Option (D) The seed of anthophytes are more advanced than those of other seed plants. The other seed plants also have dicot and monocot seeds.So, this is an incorrect answer.