The answer is D. Each element is made up of different types of atoms.
An element is made up of one type of atom. The type of atom it is made from depends on the amount of protons in an atom.
Answer:
Barriers to addressing water problems in developing nations include poverty, climate change, and poor governance. The contamination of water still remains a huge problem because of the normalization of practices that pollute the quality of water bodies. 2.3 billion people lack access to basic sanitation services, such as toilets or latrines. Worldwide, over 80% of all wastewater returns to the environment without being treated. Every day, more than 800 children under five years of age die from diarrhea caused by dirty water.
Answer:
Explanation:
A base pair is two chemical bases bonded to one another forming a "rung of the DNA ladder." The DNA molecule consists of two strands that wind around each other like a twisted ladder. Each strand has a backbone made of alternating sugar (deoxyribose) and phosphate groups. Attached to each sugar is one of four bases--adenine (A), cytosine (C), guanine (G), or thymine (T). The two strands are held together by hydrogen bonds between the bases, with adenine forming a base pair with thymine, and cytosine forming a base pair with guanine.
The answer is Cation;anion
