Which element is always found in proteins but not in carbohydrates or lipids?

Explain how two cell structures give plants their shape at a macro level

There are twenty amino acids in living organisms. Ten of these are referred to as essential amino acids. Why are they called essential amino acids?

Which of the following is a testable hypothesis? A. Classical music is better than jazz because stringed instruments, like violins, are used. B. Garden plants grow better in wet soil than in dry soil. C.

Which phrase could be used in a description of secondary endosymbiosis? a eukaryote engulfing a prokaryote a prokaryote engulfing a eukaryote a prokaryote engulfing a prokaryote a eukaryote engulfing a eukaryote?

Explain why metabolic syndrome is so dangerous

In which part of body is not found sebaceous glands?

Which of the following accurately describes the angiosperm plant life cycle? A. The ovule develops into an anther. B. The anther produces eggs. C. The embryo develops into a seedling. D. The ovary is haploid.

Which resource is a nonrenewable resource? fresh water maple trees solar energy precious metal

The trace or remains of an organism that lived ago, most commonly preserved in sedimentary rock?

Usually flowers contain more stamens than pistil. Why?