Which activity has the least impact on seagrass communities?
W)Overharvesting
X) Watershed development
Y) Boating
Z) Fertilizing farmlands
Answer: W
Multiple Choice Buzzer
- What type of organism is Antarctic krill?
- Some coral colonies remove calcium carbonate from seawater and deposit it as limestone in the reef. What is the range of yearly accumulation of limestone in a typical square mile of a reef?
- Which organism reproduces by shedding gametes into the sea, then depending upon thee chance union of egg and sperm?
- What is the carbon source for marine autotrophic organisms?
- What is an autotroph?
- What type of symbiotic relationship exists between zooxanthellae and coral?
- What is the most important source of nutrients for phytoplankton in the open ocean?
- Which of the following is the result of the oxidation of organic matter in sediments?
- Which is an example of a neritic environment?
- In which suborder are slow swimming whales, which also lack teeth, classified?
- Which of the following is the cause of red tides?
- Where does primary production by marine plants occur?
- Which stimuli result in adaptations such as vertical migration and countershading in marine life?
- Which wavelength of light could deep-sea animals most likely detect with their eyes?
- Which of the following organisms does NOT accumulate calcium carbonate?
- What is primary productivity a measure of?
- What are the two best developed senses in cetaceans?
- Where does the band of coral reef development extend to higher latitudes?
- How can you quickly determine the sex of most species of crabs?
- How many years does it take for an amount of water equal to the entire volume of the ocean to cycle through hydrothermal vents?
- Why are chelators important to marine organisms?
- What environmentally harmful isotope was produced during the 1954 'Bravo' thermonuclear detonation at Bikini Atoll?
- Which two molecules increase in concentration in deep water as it travels from the North Atlantic to the North Pacific ocean?
- What is the most abundant excess volatile on Earth?
- Which of the following primarily causes the variation in the salinity of seawater?