Sulfur has three common isotopes. one of the isotopes of sulfur has 18 neutrons. its atomic number is 16. which symbol correctly identifies this isotope of sulfur? why?

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.

Imagine you are introducing the lac operan and the trp operon to students who have never learned about it before. complete the table to compare the similarities and differences between the two operons

What is the process of a new plant growing from its seed into a seedling? primary growth fertilization pollination germination