14. The stomata are responsible for
a. translocation
b. leaf growth
c. regulating water loss
d. the transport of minerals
D?
2. In a moist area of the woods, you see a mass of small, green plants with tall, thin, non-green projections coming from their centers. These plants are probably
a. seed-bearing
b. nonvascular
c. drought-resistant spores
d. both a and b
3. Which structure is NOT present in most vascular plants?
a. seeds
b. gametophyte
c. conductive tissue
d. rhizoids
B?
Thanks
-MC
14. The stomata are responsible for regulating water loss. The correct answer is c. To understand why, let's break down the options:
a. Translocation: This refers to the movement of sugars and other organic compounds through plants, which is primarily done through the phloem.
b. Leaf growth: Leaf growth is influenced by factors such as light, water, and nutrients, but stomata themselves do not directly affect leaf growth.
c. Regulating water loss: Stomata are small openings present on the surface of leaves and stems that allow for gas exchange. They also play a crucial role in regulating water loss by controlling the amount of water vapor that escapes from the plant through a process known as transpiration.
d. Transport of minerals: The transport of minerals in plants occurs through specialized structures such as xylem and phloem, not the stomata.
Therefore, the correct answer is c - regulating water loss.
2. Based on the description provided, the plants with small, green structures and tall, thin, non-green projections are likely nonvascular plants. The correct answer is b. Nonvascular plants, such as mosses and liverworts, lack specialized tissues for conducting water and nutrients, unlike vascular plants that have xylem and phloem.
3. The structure that is NOT present in most vascular plants is the gametophyte. The correct answer is b. Vascular plants have alternation of generations, which includes a dominant sporophyte stage and a reduced gametophyte stage. The gametophyte is typically smaller and less conspicuous than the sporophyte and is usually found within the reproductive organs of vascular plants (such as within the flowers of angiosperms) rather than being a separate plant body as is seen in nonvascular plants.
However, it's worth mentioning that the presence of gametophyte varies across different groups of vascular plants, and some might have reduced or modified gametophytes. So, while gametophytes are not typically prominent in most vascular plants, there may be exceptions.
Therefore, the correct answer is b - gametophyte.