Samuel visited an ecosystem. he found that the weather is very hot and dry, the entire land is surrounded by sand, and the plants that have thorns with fleshy leaves. which ecosystem did samuel visit?
a. tropical rainforest biome
b. desert biome
c. grassland biome

The hypothesis of continental drift states that earth's continents, which are located on tectonic plates, move relative to each other. which of the following is true of the movement of the tectonic plates? a. tectonic plates only move once every million years. b. they move at a rate of approximately 5 centimeters per year. c. tectonic plates never move, only the continents located on them do. d. their movements are very rapid and occur at random times.

Read each description below and determine to which stage of sleep each pertains. then click and drag each box into the appropriate category below.

The basic types of tissue in the human body are