Ron's Throwback Thursday :)

Which characteristic is shared by all prokaryotes and eukaryotes?

• Ability to store hereditary information

• Use of organelles to control cell processes

• Use of cellular respiration for energy release

• Ability to move in response to environmental stimuli

Which characteristic is shared by both prokaryotes and eukaryotes?

• have organ systems

• make their own food

• contain genetic material

• need oxygen gas to breathe

Carbon can combine with many different elements but frequently combines with oxygen, hydrogen, and nitrogen to form organic molecules. Which statement best explains why carbon is able to form a large number of different molecules?

• carbon forms only ionic bonds

• carbon can form only ring structures

• carbon can form four covalent bonds

• carbon forms small, simple structures

The scientific study of life

• chemistry

• biology

• biotechnology

• ecology

The regulatory process in which an organism regulates its internal environment (heat, water, concentration, pH).

• Response

• Tolerance

• Niche

• Homeostasis

Made up of more than one cell.

• unicellular

• multicellular

• system

• quaternary

Anatomical unit composed of tissue serving a common function.

• cell

• organelle

• organ

• limb

Anatomical unit composed of cells organized to perform a similar function.

• organelle

• organ

• organ system

• tissue

A protein in a cell membrane changed its shape to move sodium and potassium ions against their concentration gradients. Which molecule was MOST LIKELY used by the protein as an energy source?

• ATP

• ADP

• Catalase

• Amylase

Scientists observed that the populations of top-level consumers in a particular ecosystem were rapidly decreasing. Further studies revealed that there was also a decline in producer productivity. Which other changes did the scientists most likely observe in the ecosystem?

• increased producer diversity

• decreased population size at all levels

• decreased primary consumer populations only

• increased primary and secondary consumer diversity