Answer:
In humans, each cell normally contains 23 pairs of chromosomes.
Explanation:
Answer: Carbon Dioxide, Nitrogen, Argon, and oxygen.
Explanation: Earth's atmosphere is 78% nitrogen, 21% oxygen, 0.9% argon, and 0.03% carbon dioxide with very small percentages of other elements.
A sugar phosphate backbone joins the nucleotide in a DNA sequence. A double helix has TWO backbones.
Bottom of the meniscus is the best answer for most liquids. Another correct answer would have been the center of the meniscus.