Which statement best explains how convergent boundaries cause changes in Earth’s crust? Question 4 options:

A:They create sediments that accumulate on the ocean floor.

B:They allow magma to reach Earth’s surface, creating new crust and landforms.

C:They create large rift valleys on land that eventually separate continents.

D:They cause subduction zones, which destroy old crust and add more magma to the mantle.

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My question says on my assignment. read the following scenarios and decide which of the properties of life are being described. the first one is. katherine stopped on the way to school to grab some donuts. 2. because a dog cannot sweat, it has to pant in order to stay cool. 3. an elephant trun had no bone but 4,000 muscles. i have no idea what i am supposed to anwer. i can't find the answer in my notes or book that i can understand anyway

Long-period comets come from the oort cloud particles in earth’s atmosphere material from the asteroid belt the kuiper belt

You have just sequenced a new protein found in mice and observe that sulfur-containing cysteine residues occur at regular intervals. what is the significance of this finding? it will be important to include cysteine in the diet of the mice. cysteine residues are required for the formation of α helices and β pleated sheets. cysteine residues are involved in disulfide bridges that form tertiary structure. cysteine causes bends, or angles, to occur in the tertiary structure of proteins.