Which of these is not a mollusk?
clam
octopus
snail
squid
shrimp
Which is the largest, most diverse group of arthropods?
centipedes
millipedes
insects
arachnids
crustaceans
A leech would not have
a notochord.
symmetry.
segmentation.
tissues.
a nervous system.
Which of the following animals possesses an exoskeleton?
butterfly
sea urchin
jellyfish
earthworm
oyster
In protostome development,
the blastopore becomes the mouth.
the coelom forms from mesodermal outpocketings of the gut.
the blastopore becomes the anus.
there is no coelom.
the mouth forms from the second embryonic opening, not from the blastopore.
Which of these is a unique characteristic of mammals?
brain
hair
four-chambered heart
sexual reproduction
endothermic (warm-blooded)
Which of these is least related to the others?
hermit crab
shrimp
barnacle
spider
lobster
Which are invertebrate chordates?
tunicates, lancelets, and cartilaginous fishes
tunicates only
tunicates and lancelets only
cartilaginous fishes only
lancelets only
Which of these worms are segmented?
annelids
flukes
All worms are segmented.
roundworms
flat worms
When a population reaches the stable equilibrium phase, this is considered
the slow growth stage.
the minimum number of individuals that the environment can sustain.
logarithmic growth.
exponential growth.
the carrying capacity of the environment.
Which of the following represents equilibrium type (K) survivorship?
As adults, female leatherback sea turtles return to the beaches where they hatched to lay their own brood. One female produces approximately 600 eggs, but at least 400 of these will be eaten before they ever reach the ocean.
Each spring an oak tree drops thousands of seeds but only a few will ever reach sexual maturity.
Spiders produce egg sacs with thousands of offspring but only a few survive to adulthood.
Bald eagles return to the same mates and nests each year. They typically have 2-3 eggs and with parental care provided by both parents, the survival rate of the chicks is high.
Daphnia produce offspring every 3 weeks. One Daphnia produces 8 young and after 1.5 weeks 4 of these individuals are still alive.
Which of the following is an example of a potentially population-regulating disturbance?
males fighting for access to females
parasitism
spread of West Nile virus among chickadees
wolf packs in territory disputes
flooding after heavy rains
Thanks guys
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