IB Biology Ecology

Which category of organisms is correctly described in this table?

• A

• B

• C

• D

Tags

NGSS.MS-LS2-3

What limits the length of a food chain in an ecosystem?

• The size of the individual organisms

• Competition between organisms

• The loss of energy between trophic levels

• Natural selection

Tags

NGSS.MS-LS1-6

What are characteristics of species?

• I and II

• I and III

• II and III

• I, II and III

Tags

NGSS.MS-LS1-4

NGSS.MS-LS3-1

NGSS.MS-LS4-4

The statement is about the role of some bacteria in ecosystems. What mode of nutrition is described?

• They are autotrophs

• They are consumers

• They are saprotrophs

• They are detritivores

Tags

NGSS.MS-LS2-3

The diagram represents a pyramid of energy. What level does the letter X represent?

• Light

• Primary consumers

• Abiotic environment

• Producers

Tags

NGSS.MS-LS2-3

What is the classification of an organism that is able to make organic compounds from inorganic nutrients?

• Autotroph

• Consumer

• Detritivore

• Saprotroph

What could be represented by arrows 1, 2 and 3?

• 1 - death of consumers, 2 - cell respiration in saprotrophs, 3 - Cell respiration in producers

• 1 - death of consumers, 2 - incomplete decomposition, 3 - photosynthesis in producers

• 1 - cell respiration in saprotrophs, 2 - incomplete decomposition 3 - photosynthesis in producers

• 1 - cell respiration in consumers, 2 - cell respiration in saprotrophs, 3 - Cell respiration in producers

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

A bacterial population with no resistance could develop into a bacterial population with some resistance to an antibiotic. Which event could lead to this?

• Antibiotic resistance was inherited from an ancestral population

• An antibiotic resistance plasmid is received from a bacterium in another population

• The enzyme needed for antibiotic resistance is received from a bacterium in another population

• The bacteria have mutated in response to antibiotics in the environment

Tags

NGSS.HS-LS3-2

NGSS.HS-LS4-2

NGSS.HS-LS4-4

Euglena is a unicellular organism that feeds on bacteria and uses CO₂ as a carbon source. Which described the nutrition of this organism?

• Autotrophic only

• Heterotrophic only

• Saprotrophic only

• Autotrophic and heterotrophic

Tags

NGSS.MS-LS2-1

What is lost between trophic levels and cannot be recycled?

• Heat

• Nitrogen

• Carbon compounds

• Biomass

Tags

NGSS.MS-LS2-3