 |
1 | |
Which of these features is not used to characterize major groups of seaweeds? |
| | A) | photosynthetic pigments |
| | B) | food reserves |
| | C) | cell wall components |
| | D) | type of roots |
|
|
2 | |
Going from the surface to the point of attachment to a rock, which is the correct order in which the parts of a giant kelp occur? |
| | A) | holdfast, stipe, pneumatocyst, blade |
| | B) | stipe, holdfast, blade, pneumatocyst |
| | C) | blade, pneumatocyst, stipe, holdfast |
| | D) | pneumatocyst, stipe, blade, holdfast |
|
|
3 | |
Green algae generally can be found in all of these habitats except |
| | A) | fresh water. |
| | B) | polluted areas. |
| | C) | estuaries. |
| | D) | rocks exposed to heavy wave action. |
|
|
4 | |
Which thallus shape is not found among kelp? |
| | A) | thin filaments formed by a single cell |
| | B) | a long stipe with one pneumatocyst |
| | C) | several stipes and a massive holdfast |
| | D) | a single large blade |
|
|
5 | |
Brown algae are dominant primary producers in which area? |
| | A) | tropical coasts |
| | B) | coral reefs |
| | C) | mud flats |
| | D) | temperate rocky coasts |
|
|
6 | |
Among red algae, dense clumps are characteristic of species living where? |
| | A) | in deep water |
| | B) | in areas rarely exposed to air |
| | C) | on upper levels of rocky coasts |
| | D) | as parasites on other algae |
|
|
7 | |
In many seaweeds, the thallus seen most often is a |
| | A) | sporophyte |
| | B) | gametophyte |
| | C) | zoospore |
| | D) | carposporophyte |
|
|
8 | |
In seaweeds, the result of meiosis |
| | A) | always is identical gametes. |
| | B) | always is sperm and eggs. |
| | C) | may be a spore that produces a gametophyte. |
| | D) | is a zygote. |
|
|
9 | |
Algin is used by people in which way? |
| | A) | to wrap Japanese food |
| | B) | as a medium to grow bacteria |
| | C) | as a stabilizer and emulsifier in the dairy industry |
| | D) | directly as food |
|
|
10 | |
In flowering plants, |
| | A) | the sperm consists of motile zoospores. |
| | B) | a well-developed free-living gametophyte forms. |
| | C) | marine and nearshore species do not have roots. |
| | D) | leaves are present. |
|
|
11 | |
Rhizomes of seagrasses |
| | A) | carry on photosynthesis. |
| | B) | stick upright out of soft, muddy sediments. |
| | C) | cannot transport water or nutrients. |
| | D) | generally grow beneath the sediment. |
|
|
12 | |
The northern limit of mangroves is set by which feature of the environment? |
| | A) | salinity of the water |
| | B) | frost |
| | C) | light levels |
| | D) | oxygen levels in the sediment |
|
|
13 | |
In a salt marsh, |
| | A) | cordgrasses grow well below the water level. |
| | B) | pickle weed and other halophytes live at higher levels. |
| | C) | mangroves are the dominant plants. |
| | D) | seeds germinate while on the parent. |
|
|
14 | |
A brown seaweed found floating offshore in the Gulf of Mexico likely is |
| | A) | giant kelp. |
| | B) | Irish moss. |
| | C) | dead man's fingers. |
| | D) | Sargasso weed. |
|
|
15 | |
Like calcareous green algae, coralline red algae |
| | A) | can be involved in the development of coral reefs. |
| | B) | live only in the tropics. |
| | C) | always have thalli with segments. |
| | D) | turn pink when dead. |
|