Question

drag each example to the appropriate bin.
population
not a population
cant tell
all of the whales currently living in
the atlantic ocean off cape cod,
massachusetts
the northern cardinals (cardinalis
cardinalis) living on opposite shores
of lake champlain
a group of calliope hummingbirds
(selasphorus calliope) and a group
of rufous hummingbirds
(selasphorus rufus) living in the
same new hampshire woods
all of the rainbow trout
(oncorhynchus mykiss) that have
ever lived in lake erie
the group of american bison (bison
bison) currently living in yellowstone
national park
the american bison (bison bison)
and grey wolves (canis lupus)
currently living in yellowstone
national park

Explanation:

A population is a group of individuals of the same species living in a specific geographic area.

• "All of the whales currently living in the Atlantic Ocean off Cape Cod, Massachusetts": This meets the definition of a population (same species - whales, specific area - Atlantic Ocean off Cape Cod, Massachusetts).
• "The northern cardinals (Cardinalis cardinalis) living on opposite shores of Lake Champlain": Northern cardinals are the same species, and the area (opposite shores of Lake Champlain) is specific enough to define a population.
• "A group of calliope hummingbirds (Selasphorus calliope) and a group of rufous hummingbirds (Selasphorus rufus) living in the same New Hampshire woods": These are two different species (calliope and rufous hummingbirds), so it is NOT a population.
• "All of the rainbow trout (Oncorhynchus mykiss) that have ever lived in Lake Erie": "Ever lived" includes past individuals, not just the current group in a specific area now. A population is about the current group in a defined area, so this is NOT a population.
• "The group of American bison (Bison bison) currently living in Yellowstone National Park": Same species (American bison), specific area (Yellowstone National Park) - it is a population.
• "The American bison (Bison bison) and grey wolves (Canis lupus) currently living in Yellowstone National Park": Two different species (bison and wolves), so it is NOT a population.

Answer:

• Population:
• All of the whales currently living in the Atlantic Ocean off Cape Cod, Massachusetts.
• The northern cardinals (Cardinalis cardinalis) living on opposite shores of Lake Champlain.
• The group of American bison (Bison bison) currently living in Yellowstone National Park.
• NOT a population:
• A group of calliope hummingbirds (Selasphorus calliope) and a group of rufous hummingbirds (Selasphorus rufus) living in the same New Hampshire woods.
• All of the rainbow trout (Oncorhynchus mykiss) that have ever lived in Lake Erie.
• The American bison (Bison bison) and grey wolves (Canis lupus) currently living in Yellowstone National Park.
• Can't tell: (There is no example that clearly falls into this category based on the strict definition used for population above. If more context like "a group of birds in a forest" with no species or area clarity was there, it would fit. But as per given examples, no entry here).