Historically, African elephants have had large ivory tusks. For many years, poachers (illegal hunters) have been killing elephants that have large tusks so they could sell the ivory, which is valuable. Now many African elephants have small tusks or do not develop tusks at all.
Which statement is true?
Responses
Poaching has had no effect on the size of elephant tusks.
Poaching has had no effect on the size of elephant tusks.
Elephants without tusks are more likely to be hunted than elephants with large tusks.
Elephants without tusks are more likely to be hunted than elephants with large tusks.
Elephants without tusks cannot reproduce.
Elephants without tusks cannot reproduce.
The trait of tusk size in elephants has changed over time.
qt 2
When does diversity within a species occur?
Responses
within one generation
within one generation
never
never
immediately
immediately
over many generations
qt3
What is a change that improves a species’ chance of survival?
Responses
variation
variation
adaptation
adaptation
genetics
genetics
phenotype
qt4
Which structural adaptation helps an organism obtain food?
Responses
the bright-colored skin of a poison dart frog
the bright-colored skin of a poison dart frog
dandelion seeds that can float in the wind
dandelion seeds that can float in the wind
the long neck of a giraffe
the long neck of a giraffe
the cardinal's bright red coloring
qt5
Which plant can survive in dry environments?
Responses
pine tree
pine tree
lily pad
lily pad
cactus
cactus
palm tree