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21. A biologist places a single, living sponge in a saltwater tank. After several weeks, the biologist observes other small sponges living in the tank. Because the biologist is certain that no other sponge was introduced into the tank, what other explanation could you provide to explain the observation?
22. Describe the body of a leech. In what way do the leech’s adaptations make it suited for its niche?
23. Segmented tube worms that live near the vents grow to lengths of 1.5 m in contrast to the growth of related tube worms living in other environments, whose growth is measured only in centimeters at most. You hypothesize that the food that the worms eat is more abundant at the vents. When you collect samples of the worms, you discover that they have no mouth or other means of taking in food. Hypothesize how the tube worms are obtaining nutrients.

Hi. I need to do a report on starfish and include the following about them:
-Niche
-Adaptations
-Explain the organisms interaction between it’s species and other species
-Identify location in food web and tropic level
-Identify factors that effect the organisms success in the wild
If you could provide information or links that include this information that would be great. Thank you.

A biologist places a single, living sponge in a saltwater tank. After several weeks, the biologist observes other small sponges living in the tank. Because the biologist is certain that no other sponge was introduced into the tank, what other explanation could you provide to explain the observation?
Describe the body of a leech. In what way do the leech’s adaptations make it suited for its niche?
When natural disasters strike natural areas, often the only animals to survive are the insects. Explain why this might happen.
PS, this is not my homework or anything, I need to study for a test i have in class tomorrow. So can someone plz help me? these are the only ones i cant figure out! D:

Will need to know::
*Tammar Wallaby ecosystem
*Tammar Wallaby habitat
*Tammar Wallaby diet and if it is omnivore, herbivore, or carnivore
*Tammar Wallaby Adaptations
*Tammar Wallaby Niche or Job

Will need to know::
*Tammar Wallaby ecosystem
*Tammar Wallaby habitat
*Tammar Wallaby diet and if it is omnivore, herbivore, or carnivore
*Tammar Wallaby Adaptations
*Tammar Wallaby Niche or Job