Question

1. According to the scientific method, which of the following events would occur first?
Observation and statement of the problem
Formulation of a testable hypothesis
Prediction of an outcome based on the hypothesis
Research and reading of all previously published material

2. Which of the following is NOT a characteristic of bacteria?
Circular chromosomes
Membrane-bound organelles
Plasma membrane consisting of lipids and proteins
Ribosomes that synthesize polypeptides
Cell wall made of peptidoglycan

3. Which of the following is/are characteristics of all living organisms?
Use of oxygen for energy conversion
Responsiveness to stimuli
Maintenance of homeostasis
Mutlicellular
Photosynthesis

4. The pH of human skin is 5. The pH of the small intestine is 9. The pH of skin is ___ than the pH of the small intestine.
4 times more acidic
4 times more basic
16 times more acidic
16 times more basic
10,000 times more acidic
10,000 times more basic

Answer 1

1. Research and reading of all previously published material. It is done to gain in depth view of a research problem then a testable hypothesis is formed.

2. Membrane -bound organelles , bacteria is a Prokaryotes and prokaryotes don't have membrane bound organelles.

3. Responsive to stimuli, maintainence of homeostasis both are characterstics of all living organism.

4. 10,000 times more acidic beacuse a pH difference of 1 means it is 10 times more acidic or basic.