Which of the following plankton are the smallest?
Nanoplankton is the smallest plankton (5/1000 mm to 60/1000 mm). They are primarily of single-cellular animals that eat phytoplankton. Microplankton (61/1000 mm to 1 mm) is mainly meroplankton, the eggs and larvae of invertebrates. Macroplankton (over 1 mm) contains mainly holoplankton, such as copepods and amphipods.
How are saltwater fish adapted to their saltwater surroundings?
How are saltwater fish adapted to their saltwater surroundings? They absorb water through their skin. They excrete a small volume of very salty urine.
Which of the following properties most determines water’s vertical position in the ocean?
The property that most determines the water's vertical position in the ocean is: Density.
Which of the following kingdoms include various types of marine algae and single celled organisms called protozoa?
The taxonomic kingdom Protista is a collection of single-celled organisms that do not fit into any other category. Protists are a group made up of protozoa, unicellular algae, and slime molds. We will concentrate on the animal portion of this group: the protozoa (proto = first, zoa = animals).
What are plankton is there any difference in the plankton occurring in fresh water and sea water?
Plankton can be found in saltwater and freshwater. One way to tell if a body of water has a large plankton population is to look at its clarity. Very clear water usually has less plankton than water that is more green or brown in color.
What are the roles of planktons in sea environment?
Marine plankton, found in all ocean ecosystems, play a critical role in maintaining the health and balance of the ocean and its complex food webs. The oxygen, nutrients, and biomass they produce also sustain terrestrial life—from the food we eat to the air we breathe.
How have freshwater and saltwater fish adapted to deal with osmosis and their respective environments?
Water for Replacement Salt water fish are perfectly adapted to their salty environment and need osmosis to live. The replacement fluid taken on to replace the lost water is desalinated by a process known as diffusion. Diffusion allows fish to live in a state of constant osmosis.
How do the cells in a fish react when it moves from saltwater to freshwater apex?
A fish that lives in salt water will have somewhat salty water inside itself. Put it in the freshwater, and the freshwater will, through osmosis, enter the fish, causing its cells to swell, and the fish will die.
Which of the following is a type of plankton?
There are two main types of plankton: phytoplankton, which are plants, and zooplankton, which are animals. Zooplankton and other small marine creatures eat phytoplankton and then become food for fish, crustaceans, and other larger species.
How are temperature salinity and density related?
The density of water increases as the salinity increases. The density of seawater (salinity greater than 24.7) increases as temperature decreases at all temperatures above the freezing point.
How does water temperature affect the water’s ability to hold gases How do marine organisms extract dissolved oxygen from seawater?
How does water temperature affect the water's ability to hold gases? How do marine organisms extract the dissolved oxygen from seawater? Reducing the temperature of seawater increases its capacity to hold gases in solution (cold water holds more dissolved gas in solution).
Which of the following types of plankton can photosynthesize and produce its own food group of answer choices?
Most of the plankton in the ocean are plants. Phytoplankton produce their own food by lassoing the energy of the sun in a process called photosynthesis. So for sunlight to reach them, they need to be near the top layer of the ocean. So must zooplankton, which feed on the phytoplankton.
What are planktons is there any difference in the planktons occurring in fresh water and sea water class 12?
Plankton can be found in saltwater and freshwater. One way to tell if a body of water has a large plankton population is to look at its clarity. Very clear water usually has less plankton than water that is more green or brown in color.
What are planktons is there any difference in the plankton?
Plankton are marine drifters — organisms carried along by tides and currents. … Plankton are usually microscopic, often less than one inch in length, but they also include larger species like some crustaceans and jellyfish.
What happens to phytoplankton when ocean temperatures warm?
Given access to sunlight and nutrients, phytoplankton can bloom in numbers of millions of cells per litre of seawater. But as the oceans warm, the water column is forming into more distinct layers, and staying that way for longer periods.
How then do fish and other forms of marine life survive in a salt water environment?
Soaking in Salt So fish need to drink lots of seawater to stay hydrated. And because seawater is so salty, they also must pump out the excess salt, both through their kidneys and using specialized cells in their gills.
Do freshwater fish live in a hypertonic or hypotonic environment?
Freshwater fish are fish that spend some or all of their lives in fresh water, with a salinity of less than 0.05%. Freshwater fish is hypotonic to saltwater. Therefore, they have low ion concentration within their body cells than saltwater.
How have freshwater and saltwater fish adapted to deal with osmosis in their respective environments?
Water for Replacement Salt water fish are perfectly adapted to their salty environment and need osmosis to live. The replacement fluid taken on to replace the lost water is desalinated by a process known as diffusion. Diffusion allows fish to live in a state of constant osmosis.
Are freshwater fish hypotonic or hypertonic?
Although the skin of fish is more or less waterproof, the gills are very porous. The body fluids of fish that live in fresh water have a higher concentration of dissolved substances than the water in which they swim. In other words the body fluids of fresh water fish are hypertonic to the water (see chapter 3).
What are the characteristics of plankton?
Plankton are usually microscopic, often less than one inch in length, but they also include larger species like some crustaceans and jellyfish. Scientists classify plankton in several ways, including by size, type, and how long they spend drifting.
Why is cold water more dense than warm water?
Cooling a substance causes molecules to slow down and get slightly closer together, occupying a smaller volume that results in an increase in density. Hot water is less dense and will float on room-temperature water.
Is warm water denser than cold water?
Cold, salty water is dense and sinks to the bottom of the ocean while warm water is less dense and remains on the surface. Cold water has a higher density than warm water.
Does cold water hold more or less dissolved oxygen than warm water?
Dissolved oxygen, temperature, and aquatic life Cold water can hold more dissolved oxygen than warm water. In winter and early spring, when the water temperature is low, the dissolved oxygen concentration is high. In summer and fall, when the water temperature is high, the dissolved-oxygen concentration is often lower.
Why does cold water have more oxygen?
The quick answer is that the colder a liquid, the more gas it can dissolve or "contain" as you aptly put it. So a cold glass of water has more oxygen stored in it than a warm glass.
How do plankton adapt to their environment?
Plankton avoid sinking through increased surface area. Flattened bodies and appendages, spines, and other body projections slow sinking by adding surface area without increasing density. Some phytoplankton also avoid sinking by forming large chains.
What is the main difference between phytoplankton and zooplankton quizlet?
What is the main difference between phytoplankton and zooplankton? Phytoplankton produces food via photosynthesis whereas zooplankton must eat food.
What is the difference between phytoplankton and zooplankton Why are they both plankton?
Both phytoplankton and zooplankton are similar in size and their ecological importance. The main difference between phytoplankton and zooplankton is that phytoplankton is a plant-like organism whereas zooplankton is an animal-like organism. Phytoplankton serves as a primary producer in the aquatic food chains.
How does ocean warming affect plankton?
Some plankton, such as diatoms, grow better at cooler temperatures. Warming may cause other, less palatable, species to replace them, depriving zooplankton and menhaden of their primary food source. Because phytoplankton are linked to freshwater and nutrient inputs, draught will likely decrease their abundance.
Can plankton survive in warm water?
Although they are small, they flourish in every ocean, consuming as much carbon dioxide through photosynthesis as all the terrestrial plants combined. Water temperatures strongly influence their growth rates. In fact, phytoplankton in warmer equatorial waters can grow much faster than their cold-water cousins.
How do marine animals adapt to hypertonic sea water?
To maintain salt balance (salt homeostasis) in the body they have salt secreting chloride cells in their gills. Marine birds like sea gulls and penguins eliminate salts in the form of salty fluid that drips through their nostrils. In turtles the ducts of chloride secreting glands open near the eyes.