Cells of the immune system are able to respondto the presence of invading organisms becausethey recognize the(1) antigens present on the invaders(2) antibodies present in invading pathogens(3) dna pattern in the nuclei of viruses(4) antibiotics released from microbes

Compare and contrast nutrient limitation in soil vs. nutrient limitation in aquatic ecosystems

Which statements correspond to cellular respiration? co2 diffuses passively into the cell. co2 diffuses passively out of the cell. co2 must be pumped out of the cell. o2 diffuses passively when produced inside the cell. o2 diffuses passively when converted to co2. o2 is pumped in and forces co2 out.

Select the correct answer. which mutation is harmful to the organism? a. a mutation allowing moths to camouflage better on blackened tree bark b. a mutation making staphylococcus aureus resistant to the antibiotic methicillin c. a mutation inhibiting human immunodeficiency virus from attaching to and entering the cell d. a mutation causing uncontrolled cell division e. a mutation giving plant leaves a bitter taste to discourage herbivores from eating them