Echinoderms lack a centralized nervous system, and echinoderms include starfish, sea urchins, and sea cucumbers. Given these facts, starfish, sea urchins and sea cucumbers lack a what among the following options: - characteristics - the body's largest organ - watery habitat - centralized nervous system - functioning arm - underwater life - biological diversity - epidermis and dermis
centralized nervous system
------
Platypus females lay their eggs in a burrow, and when the eggs hatch, the hen leaves the nest site. Given these facts, what females nest in a burrow and wait for the hatching among the following options: - ostrich - burrowing rabbits - loose soil - insects - warm-blooded - honeybees - rooster - platypus
platypus
------
The surface of a beach is formed by mechanical weathering, and sandy and dusty surfaces get hotter during the day, like beach sand. Given these facts, what is a beach formed by among the following options: - movement of tectonic plates - heat change - mechanical weathering - By coral exoskeletons - seasonal changes - patch reefs - sedimentation - Nurseries of the ocean.
mechanical weathering
------
Heat and pressure change the remains of prehistoric living things into natural gas, and dinosaurs and Other Prehistoric Creatures Dinosaurs are just one group of prehistoric animals. Given these facts, what does heat and pressure change into natural gas among the following options: - Something formed from skeleton - compound of hydrogen oxygen - Chemical energy - art - kinetic energy - remains of dinosaurs - preparation - science
remains of dinosaurs
------