Some variation must be present in a population in order for natural selection to take place. These variations arise from mutations in the DNA and what?

What are similarities and differences between the organization and structure of DNA in bacterial cells and in human cells?

A microbiologist has isolated a bacterium from his face and wishes to determine whether it might be a member of the normal microbiota. Which of the following would NOT be evidence for such a conclusion? The bacterium is extremely salt tolerant.

An epidemiologist is investigating a new disease and observes what appear to be bacteria

What is a insertion in biology

Only genetic changes in (sex cells/body cells) can be passed to offspring. Which one fits the sentence best? tysm ily

Which fossil would look most like an ancient organism? * trace cast mold?

What is the genotype for straight hair

Look at the chemical reaction below Magnesium + hydrochloride acid - > magnesium chloride + hydrogen Mg + 2HCI - > MgCI2 + H2 In this reaction Magnesium (Mg) is a reactant or product Hydrogen (H2) is a reactant or product Magnesium chloride (MhCI2)

Where does the primary source of energy needed for life come from? 1) solar energy 2) geothermal energy 3) nuclear energy 4) kinetic energy

Which molecules is not part of the cell membrane? a. lipid b. nucleic acid c. phosphate group d. steriod e. protein?