What was the greatest step toward the discovery of cells?

Savannas experience warm temperatures, low levels of precipitation, and have an abundance of grasses and shrubs. What events often occur because of these conditions? Group of answer choices fires tornadoes earthquakes floods

Which element makes up the greatest percentage of the human body?

Dwayne is making a cladogram using a diagonal line. Where should he place the least primitive organism?

Which of the following are allies to the immune system Mucous Membranes Digestive system Skeletal System Skin

In E. Coli, the gene laci codes the lac operon repressor. Which of the following statements is true about an E. coli strain, which is laci-, that is null mutant for laci. a.

Which sequence furthers scientific knowledge

Thi process transfer energy from nutrients to atp

How would you make the observation "The bird chirped" into a scientific observation?

1. Humans start off as what?

Which of the following is a true statement about codons? A. A codon is a sequence of four nitrogenous bases. B. A codon is a sequence of three amino acids. C. In translation, an mRNA codon is recognized by its complementary amino acid. D.