<span>Exoskeleton. <span>Bilateral Symmetry. Invertebrate.
Crabs have an exoskeleton.
Spiders have Bilateral symmetry.
Lobsters are an invertebrate.
Although all these are arthropods and have all these characteristics in common.</span></span>
Answer:
Respiratory system
Explanation:
Like other fishes, sharks extract oxygen from water as it passes over their gills.
Answer:
B) gamma rays are high energy and may cause damage to healthy cells.
Explanation:
Gamma rays (γ) are a type of electromagnetic radiation formed by highly energetic and high frequency photons. They have a great penetrating capacity, being able to propagate thousands of meters in the air and pass through steel sheets up to 15 cm thick. They propagate in vacuum at the speed of light, about 300,000 km/s.
Gamma rays are high energy and in contact with the tissues of the human body can cause serious problems. Gamma rays passing through our body produce ionization in cellular tissues. High levels of gamma rays can produce dangerous tissue ionization and can cause damage to healthy cells.
The ways in which an element—or compound such as water—moves between its various living and nonliving forms and locations in the biosphere is called a biogeochemical cycle. Biogeochemical cycles important to living organisms include the water, carbon, nitrogen, phosphorus, and sulfur cycles.