AP BIOLOGY

PLANTS

CLASSIFICATION OF PLANTS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following is an example of Dormancy?
A
A plant being cut down into a stump
B
A plant wilting and drying out because Mrs. Tyler forgot to water it:(
C
A rabbit eating your mother’s garden flowers
D
Plants losing their leaves for the winter
Explanation: 

Detailed explanation-1: -In autumn, decreasing day length (short-day photoperiod), for example, sends some species into a dormant state. This is most obvious in deciduous trees, which drop their leaves and stop growing for the winter, thereby conserving energy for an explosion of growth in spring.

Detailed explanation-2: -Think of the most evident example of winter dormancy: your lawn. Each year, it eventually stops growing and turns brown after it’s been cold for long enough. Still, you can always count on it to come back (and turn green), ready for its weekly upkeep once again.

Detailed explanation-3: -In Arctic regions, for example, certain animals become dormant during the winter months, when food is less abundant. In desert biomes, on the other hand, the summer months, which may be periods of reduced food availability, intense heat, or extreme aridity, stimulate some desert organisms to become dormant.

Detailed explanation-4: -A warm winter means woody plants will be ready to grow when the weather warms up. Since most plants do not grow during the winter, we say they are dormant.

Detailed explanation-5: -There are two different categories of seed dormancy: exogenous and endogenous (Scarification). Exogenous dormancy is caused by conditions outside of the seed’s embryo. An example of exogenous dormancy is when the seed coat is too durable for moisture to infiltrate, effectively preventing germination.

There is 1 question to complete.