Plz answers... is worth 40 points

Living cells cannot use heat to provide the activation energy for biochemical reactions because which choice(s) complete the sentence correctly? a) answer choice ii. eliminate b) answer choices ii and iv. c) answer choice iii and iv. d) all answers can complete the sentence.

Compare the depth of field when focusing with low power and high power. which power has the greater depth of field?

There are only about 250,000 known fossil species. true or false