Unit 1: Primary Producers

Question 1

Primary producers

Answer 1

• Are the basis of every food web in aquatic ecosystems
• Capable of self- nourishment by using inorganic materials as a source of nutrients
• use photosynthesis or chemosynthesis as a source of energy.

Question 2

Primary Productivity

Answer 2

The rate at which energy is converted by photosynthetic and chemosynthetic autotrophs into organic substances

Question 3

Prokaryote

Answer 3

A cellular organism with no nuclear membrane and no organelles, except ribosomes, and has genetic material in the form of coils or loops; all organisms in the Kingdom Monera.

Question 4

Cladogram

Answer 4

A branching diagram depicting the successive points of species divergence from common ancestral lines without regard to the degree of deviation

Question 5

Dichotomous key

Answer 5

A key for the identification of organisms based on a series of choices between alternative characters.

Question 6

Photosynthesis

Answer 6

The synthesis of chemical compounds with the aid of radiant energy and especially light; formation or carbohydrates from CO2 and a source of hydrogen in the chlorophylll-containing cells exposed to light.