Which of the following terms means "a group of connected or related objects or materials"?
A. Biology
B. Matter
C. Structure
D. System

Coquina, a type of limestone, forms from shell fragments that settle on the ocean floor. what type of rock is coquina?

20 points and brainlist 1. london has suffered from terrible air pollution for at least seven centuries. why is the city so prone to its famous “london fog? ” what did london do to get rid of its air pollution? 2. why does air pollution cause problems in developing nations more than in developed ones?

Why is the theory of evolution important? it disproves all other theories about how life began. it provides a topic for debate. it is a unifying concept in biology. it explains how life began. i know for sure, it is not "it is a unifying concept in biology."