Could cellular respiration happen without photosynthesis? explain your reasoning.

No, because of the glucose involved in both processes:

In photosynthesis ATP and glucose are produced, which are used by the plant in many different processes that have many different vital functions.

Cellular respiration is one of those vital processes, that depend on glucose, which is synthesised during the respiration process so that it can be used.

Hope it helped,

BioTeacher101

all these collisions do one thing, and that thing is explained in the last option. when dusst, rocks and ice collide, they harden and form giant layers of rocks or hard ice.

d)   to harden materials to form different parts of earth’s layers

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bioteacher101