Corals are tiny animals, called polyps, that are related to and look like sea anemones. Each coral secretes a stony cup of limestone around itself as a skeleton. The polyps divide as they grow and form coral colonies. As the coral colonies build up on top of each other, they gradually form a coral reef.
Who is responsible for the vast majority of the ocean’s primary productivity?
Photosynthetic microbes, collectively termed phytoplankton, are responsible for the vast majority of primary production in marine waters. The availability of nutrients in the upper ocean frequently limits the activity and abundance of these organisms.
Which of the following refers to an organism that lives on the bottom of the ocean?
Benthos are living organisms on the ocean floor. Many benthic organisms attach themselves to rocks and stay in one place. This protects them from crashing waves and other water movements. Some benthic organisms burrow into sediments for food or protection. Benthic animals may crawl over the ocean floor.
Which of the vertebrate groups is considered the most ancient?
The earliest vertebrates were jawless fish, similar to living hagfish. They lived between 500 and 600 million years ago.
Which of the following is the primary energy source for producers in near surface marine communities?
Producers use energy from the sun to make organic matter, such as sugars, from carbon dioxide and water and are then consumed by organisms higher in the food chain. In reef ecosystems, corals often have microalgae living inside them. The algae supply the corals with nutrients, and the coral give shelter to the algae.
Which of the following is are required by marine primary producers for growth?
Most primary producers require nitrogen and phosphorus, which are available in the ocean as nitrate, nitrite, ammonia, and phosphorus. The abundances of these molecules and the intensity and quality of light exert a major influence on rates of production.
Which of the following can produce their own food using an external energy source such as the sun thermal or chemical energy )?
An autotroph is an organism that can produce its own food using light, water, carbon dioxide, or other chemicals. Because autotrophs produce their own food, they are sometimes called producers. Plants are the most familiar type of autotroph, but there are many different kinds of autotrophic organisms.
What substance deposited by organisms such as corals makes up coral reefs?
A coral reef is made of thin layers of calcium carbonate Massive reef structures are formed when each individual stony coral organism—or polyp—secretes a skeleton of calcium carbonate.
How do marine reptiles and seabirds deal with the salinity of seawater group of answer choices?
How do marine reptiles and seabirds deal with the salinity of seawater? They have special glands that help excrete salt. Macroplankton are the smallest size class of plankton.
What do you call an organism that primarily obtains food by killing and consuming other organisms?
A predator is an organism that consumes all or part of the body of another—living or recently killed—organism, which is its prey. “
What term is used to describe an organism which depends its subsistence on others?
A heterotroph is an organism that consumes other organisms in a food chain. 5 – 8. Biology, Ecology.
What do you call the organisms that obtain energy by eating other organisms?
Organisms that obtain their energy by feeding on other organisms are called heterotrophs. Autotrophs are living organisms that are able to make their own food through photosynthesis, and these are plants and algae. Organisms that must consume or absorb their nutrients are called heterotrophs.
Which class of animal has skin with scales lays eggs with a leathery shell and does not maintain a constant body temperature?
Unlike amphibians’ eggs, reptiles’ eggs have soft, leathery shells that keep them from drying out.
What is the basis for grouping of vertebrates into two divisions name the two divisions?
They are as follows: Class Aves. Class Reptilia.
What are the 5 types of vertebrates?
The phylum chordata (animals with backbones) is divided into five common classes: fish, amphibians, reptiles, mammals and birds.
Which of the following energy sources produces the most air pollutants when used?
Coal produces more pollution than any other energy source. While coal produces just 44% of U.S. electricity, it accounts for 80% of power plant carbon emissions. Burning coal leads to soot, smog, acid rain, global warming, and carbon emissions.
Which type of productivity of producers can be used by other trophic levels?
So, the correct answer is ‘Net Primary Productivity’. Note: From one trophic level to the next trophic level only 10% of energy will be transferred and 90% of the energy gets lost. This is called the 10 percent law.
Which one of the following is a very important source of energy for nearly all cells?
In fact, the Sun is the ultimate source of energy for almost all cells, because photosynthetic prokaryotes, algae, and plant cells harness solar energy and use it to make the complex organic food molecules that other cells rely on for the energy required to sustain growth, metabolism, and reproduction (Figure 1).
Which of the following elements is most likely to limit primary production in freshwater lakes?
The correct answer is Phosphorus. Phosphorus is most likely to limit primary production in freshwater lakes. Primary production is the process of conversion of light energy to chemical energy by green plants. For the aquatic ecosystem, usually, phytoplankton does this work.
Who is the main producer in the ocean ecosystem What is the significance of producers of ocean in the living world?
Phytoplankton is the producer in the ocean. Diatoms belong to the class of phytoplankton which are known as chief producers in the ocean. The food chain in a marine ecosystem depends on it.
What group of organisms are the most important primary producers in the marine aquatic food web how deep down in the water column can they be found?
How deep down in the water column can they be found? Phytoplankton are microscopic algae. They are the most important primary producers in most marine ecosystems. Their growth is limited to the euphotic zone, the depth to which light sufficient for photosynthesis can penetrate.
Which of the following obtain energy by oxidizing inorganic substances to obtain energy that is used in part to fix carbon dioxide?
Which of the following obtain energy by oxidizing inorganic substances; energy that is used, in part, to fix CO2? -Chemoautotrophs need only an inorganic molecule like CO2 as a carbon source but obtain energy by oxidizing inorganic substances.
What is the process by which plants manufacture their own food by converting solar energy into chemical energy?
Photosynthesis is the process by which plants use sunlight, water, and carbon dioxide to create oxygen and energy in the form of sugar.
When cells perform photosynthesis they transform energy from one form to another which of the following takes place during photosynthesis?
More than one answer may be correct. When cells perform photosynthesis, they transform energy from one form to another. Which of the following takes place during photosynthesis? Chemical potential energy is stored in the bonds of carbohydrate molecules.
What kind of organism are most important in deposition of calcium carbonate on coral reefs?
Calcareous organisms such as mollusks and brachiopods contribute to carbonate build up.