Answer: Sea stars move using a water vascular system. Water comes into the system via the madreporite. It is then circulated from the stone canal to the ring canal and into the radial canals.
Explanation: The radial canals carry water to the ampullae and provide suction to the tube feet.
Answer:
Ecology is the study of interactions between organisms and their surround- ings including other organisms. Organisms grow, multiply, occupy different regions, compete with others for resources, prey upon others, transform into different species etc. Many interesting questions can be asked of this broad canvass.
Explanation:
Explanation:
the scientific method is the process that involves various steps to develop knowledge about the natural world that has characterized the development of science
Steps of the scientific method
•ask a question
•do background research
•construct a hypothesis
•Test your hypothesis by doing experiment
• Analyze your data and draw conclusion
•communicate your results
The mediastinum is the space between the lungs. Organs in it include the heart, esophagus, aorta, and part of the thymus gland.
I think the correct answer is C. Less than 10% of rain falls in a dry desert. Desert biomes are known to be the driest of all types of biomes. It receives very or almost no rainfall. Precipitation in a dry desert is about 250 mm per year.
