AP BIOLOGY

PLANTS

CLASSIFICATION OF PLANTS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Miss Kearns’s class takes a nature hike. How do the students identify a fern plant?
A
Look for petals and flowers
B
Look for cones that grow along branches
C
Look for brown spores underneath the leaves
D
Look for fuzzy patches that grow near the ground
Explanation: 

Detailed explanation-1: -The frond of a fern consists of a stalk with a green, leaf-like growth emerging from it. Usually the leaf-like material of a frond is sub-divided into multiple leaf-like growths. When the blade is divided in this way, each division is called a pinna (pronounced “PIN-nuh”; the plural is pinnae, pronounced “PIN-knee”).

Detailed explanation-2: -Answer: Those brown spots are the reproductive spores of the ferns. They can be harvested and used to start new ferns indoors, or just allow them to fall naturally and see what happens. In either case, they are not harmful to your plants.

Detailed explanation-3: -Shape. The basic spore shape among ferns is tetrahedral; the proximal face (the one facing inward during the tetrad, or four-cell, stage following reduction division, or meiosis) is made up of three sloping planes, and the distal, or outer, face consists of a single rounded surface.

Detailed explanation-4: -The leaves of ferns are often called fronds. Fronds are usually composed of a leafy blade and petiole (leaf stalk). Leaf shape, size, texture and degree of complexity vary considerably from species to species.

There is 1 question to complete.