one example of a biological product is: a) methotrexate b) filgrastim c) bleomycin d) vincristine a) methotrexate b) filgrastim c) bleomycin d) vincristine.

1. Some of the strangest creatures on Earth live in the ocean. The seafloor is an eerie world that time
forgot. Tall chimneys erupt hot, mineral-rich water that supports a variety of unusual organisms in
the cold, dark abyss. These unusual organisms have no counterparts anywhere else in the sea.
Today, the world ocean is home both to the largest animal that has ever lived (wanna guess what
it is?) and to many of Earths smallest organisms. Cyanobacteria, a blue-green algae, grow in the
surface waters. Several hundred could fit comfortably on the point of a needle. Marine biologists
estimate that there are at least nine million species of unicelluar organims, plants, and animals
living in the oceans. As of now, they have identified only about 1,000,000 of them.
The Captain's Orders
The oceans may be divided into large biomes, or living regions (Figure 1). These zones are based
on the distribution of marine organisms. The two major environments are the pelagic, which
consists of the water column, and the benthic, which comprises the ocean bottom. The organisms
that live in these zones can be classified in terms of the habitat they occupy.
Figure 1. Classification of life zones in the oceans.
The factors that affect primary productivity are (1) the availability of light, (2) the availability of
nutrients and (3) the rate of grazing by primary consumers (herbivores).
Figure 2. Seasonal variations in nutrient elements, plankton biomass, and light for a mid-latitude
oceanic region
Questions
For each question, provide the physical and chemical factors in each environment when writing
your answer. For example, in the bathypelagic region, there is a lack of light and immense
pressure. Animals may be small or blind because of this.
Providing images gets extra points.
1. Pick an animal who lives in the epipelagic zone and describe adaptations it would have to live in
this region, and why.
2. Pick an animal who lives in the mesopelagic zone and describe the adaptations it would have to
live in this region, and why.
3. Pick an animal who lives in the bathypelagic zone and describe the adaptations it would have to
live in this region, and why.
4. Pick an animal that lives the supralittoral zone and describe the adaptations it would have to live
in this region, and why.
5. Which zone has the most marine life?
Answer the following questions using Figure 2:
6. Why do the dissolved nutrients drop in the spring?
7. Why does the spring phytoplankton bloom start in the spring and die out in the early summer?
8. Why is there a difference in the steepness of the zooplankton biomass curves during the spring
bloom?
9. What are some possible reasons for a fall phytoplankton bloom?
10. Where on Earth would the plankton show a different seasonal pattern of growth and why?

2. Some of the strangest creatures on Earth live in the ocean. The seafloor is an eerie world that
time forgot. Tall chimneys erupt hot, mineral-rich water that supports a variety of unusual
organisms in the cold, dark abyss. These unusual organisms have no counterparts anywhere else
in the sea.
Today, the world ocean is home both to the largest animal that has ever lived (wanna guess what
it is?) and to many of Earths smallest organisms. Cyanobacteria, a blue-green algae, grow in the
surface waters. Several hundred could fit comfortably on the point of a needle. Marine biologists
estimate that there are at least nine million species of unicelluar organims, plants, and animals
living in the oceans. As of now, they have identified only about 1,000,000 of them.
The Captain's Orders
The oceans may be divided into large biomes, or living regions (Figure 1). These zones are
based on the distribution of marine organisms. The two major environments are the pelagic,
which consists of the water column, and the benthic, which comprises the ocean bottom. The
organisms that live in these zones can be classified in terms of the habitat they occupy.
Figure 1. Classification of life zones in the oceans.
The factors that affect primary productivity are (1) the availability of light, (2) the availability of
nutrients and (3) the rate of grazing by primary consumers (herbivores).
Figure 2. Seasonal variations in nutrient elements, plankton biomass, and light for a mid-latitude
oceanic region
Questions
For each question, provide the physical and chemical factors in each environment when writing
your answer. For example, in the bathypelagic region, there is a lack of light and immense
pressure. Animals may be small or blind because of this.
Providing images gets extra points.
1. Pick an animal who lives in the epipelagic zone and describe adaptations it would have to live
in this region, and why.
2. Pick an animal who lives in the mesopelagic zone and describe the adaptations it would have
to live in this region, and why.
3. Pick an animal who lives in the bathypelagic zone and describe the adaptations it would have
to live in this region, and why.
4. Pick an animal that lives the supralittoral zone and describe the adaptations it would have to
live in this region, and why.
5. Which zone has the most marine life?
Answer the following questions using Figure 2:
6. Why do the dissolved nutrients drop in the spring?
7. Why does the spring phytoplankton bloom start in the spring and die out in the early summer?
8. Why is there a difference in the steepness of the zooplankton biomass curves during the spring
bloom?
9. What are some possible reasons for a fall phytoplankton bloom?
10. Where on Earth would the plankton show a different seasonal pattern of growth and why?