This set of Marine Biotechnology Multiple Choice Questions & Answers (MCQs) focuses on “Marine Plants”.
1. Marine plants flourish only in the photic zone.
a) True
b) False
View Answer
Explanation: Marine plants are usually restricted to the photic zone in marine environment which is up to a depth of 200 meters. There is an additional requirement of marine plants that is attachment to a hard substrate.
2. Match the following.
| a) Thalassia | I. Eelgrass |
| b) Zostera | II. Surfgrass |
| c) Phyllospadix | III. Turtle grass |
a) a-(III) b-(I) c-(II)
b) a-(II) b-(III) c-(II)
c) a-(III) b-(II) c-(I)
d) a-(I) b-(III) c-(II)
View Answer
Explanation: Thalassia also called the turtle grass is a seaweed species. Similarly, Zostera – eelgrass and Phyllospadix – surfgrass are also species of seaweeds. Nearly half of the seaweed species are restricted to tropics and subtropics and are visible only during low tides.
3. Which is an herbivorous marine mammal?
a) Manatees
b) Sea otter
c) Polar bear
d) Walrus
View Answer
Explanation: Manatees and Dugong are the only two herbivorous marine mammals that feed on seagrasses and algae (only if seagrasses are not abundant). Manatees feed on a wide range of seagrass species from bottom-growing to surface-floating.
4. Another name for red mangroves is __________________
a) Filter feeders
b) Rhizophora
c) Phaeophyceae
d) Chlorophyceae
View Answer
Explanation: Red mangroves or Rhizophora is a type of mangroves having prop roots for maximal absorbance of nutrients from soft substrates. These mangroves produce seeds that germinate while hanging from the branches.
5. Photosynthesis in seaweeds typically occurs in the stipes and holdfast.
a) True
b) False
View Answer
Explanation: Standing crops are governed by a balance between the crop increase and the crop decrease. In case of primary producers of the sea, the phytoplankton, the crop increase is the cell divison and growth and crop decrease is the cell sinking and grazing.
6. Which is a common epiphyte of seaweeds?
a) Red algae
b) Dinoflagellate
c) Diatoms
d) Penaeid shrimp
View Answer
Explanation: Red algae such as Smithora and Chondria are common epiphytes belonging to the phylum of red algae. Depending upon the species, various algae have a variety of adaptations that aid their attachment to the seaweeds.
7. Ulva is a __________________
a) epiphytic red alga
b) endophytic red alga
c) green alga
d) brown alga
View Answer
Explanation: Ulva is a green alga formed of flat sheets that can be often seen during on the shores after low tides. Only a few members of the Chlorophyta are marine species, as compared to Rhodophyta and Phaeophyta.
8. Which is a characteristic photosynthetic pigment of the Phaeophyta?
a) Fucocyanin
b) Fucoxanthin
c) Phycocyanin
d) Phycoerythrin
View Answer
Explanation: Sometimes the photosynthetic pigments of brown algae (members of Phaeophyta) appear as greenish. Most often, however, the green chlorophyll pigments are masked by the characteristic fucoxanthin pigments giving an olive-green hue to the seaweeds.
9. Porphyra, an alga bright green in color belongs to ___________________
a) Rhodophyta
b) Ascidian
c) Phaeophyta
d) Chlorophyta
View Answer
Explanation: Porphyra, although green in color belongs to the group Rhodophyta. Red algae have red and blue phycobilin pigments and exhibit a wide variety of colors, mostly being less than a meter in length.
Sanfoundry Global Education & Learning Series – Marine Biotechnology.
To practice all areas of Marine Biotechnology, here is complete set of 1000+ Multiple Choice Questions and Answers.
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