List 3 ways molecules cross a cell membrane without using energy

What do autotrophs do during photosynthesis

If the gene encoding the lac repressor is mutated so that the repressor can no longer bind the operator, will a high level of transcription of that operon occur?

What trait distinguishes between the kingdoms of bacteria and archaea?

An invasive plant species takes over an aquatic ecosystem. Which scenario is likely to cause the ecosystem's collapse? A. The native herbivores are not able to eat the new plant. B. The tertiary consumers adapt well to the invasive plant. C.

What is the macromolecule that builds both cilia and flagella? A. calcium B. carbohydrates C. lipids D. proteins

Which statements about a child with brown eyes must be true? Choose more than one answer

I observe that squirrels that live in the southeastern United States are much thinner than squirrels that live in the northeastern part of the country.

66) homologous chromosomes move toward opposite poles of a dividing cell during; a) mitosis.; b) meiosis i.; c) meiosis ii.; d) fertilization.; e) binary fission.

What is true about gradualism with respect to punctuated equilibrium

Which statement is true? A. Prokaryotic cells do not have a membrane. B. Eukaryotic cells have multiple membranes. C. Eukaryotic cells have one membrane. D. Prokaryotic cells have multiple membranes.