Question 1
during which era did the breakup of pangaea begin?

paleozoic

mesozoic

precambrian

none of the above

1 points
question 2
bivalves became important parts of as the triassic period progressed.

phytoplankton

forests

reefs

none of the above

1 points
question 3
which of the following is not a type of swimming reptile?

ichthyosaurs

placodonts

nothosaurs

none of the above

1 points
question 4
plesiosaurs swam by using their paddle-like limbs in a manner similar to that of a

fish.

sea lion.

human.

none of the above

1 points
question 5
during which period did the first birds evolve?

permian

cretaceous

triassic

jurassic

1 points
question 6
which of the following is a characteristic of carnosaurs?

long narrow skulls

strong forelimbs

horns projecting from their skulls

all of the above

1 points
question 7
angiosperms appeared near the beginning of the period.

cretaceous

jurassic

triassic

none of the above

1 points
question 8
what is triceratops an example of?

mosasaurs

hadrosaurs

ankylosaur

ceratopsians

1 points
question 9
pterodactyls in the cretaceous period had tails.

long

short

no

none of the above

1 points
question 10
the deccan traps in happened at the same time as the cretaceous mass extinction.

australia

india

alaska

greenland

In a hypothetical breed of dogs, coat color is controlled by two genes. there are six different coat colors in this breed: black, brown, cream, gray, silver, and tan. consider the following crosses. cross 1: black females from a lineage of all black dogs are crossed with brown males from a lineage of all brown dogs. f1 males and females are all black. when f1 are intercrossed, f2 males and females are black or brown. cross 2: black females from a lineage of all black dogs are crossed with tan males from a lineage where all males are tan and all females are cream. f1 males are black, f1 females are gray. when f1 are intercrossed, f2 males and females are black, brown, gray, or tan. cross 3: silver females from a lineage where all females are silver and all males are gray are crossed with brown males from a lineage of all brown dogs. f1 males and females are all gray. when f1 are intercrossed, f2 males are black, brown, gray, or tan, f2 females are cream, gray, silver, or tan. select the correct statements regarding the mode of inheritance of the coat color genes. a) both genes are x-linked. b) both genes are autosomal. c) one of the genes modifies the expression of the other gene. d) each gene has an additive effect on the intensity of coat color. e) each gene independently specifies three colors. f) one of the genes is autosomal, and the other is x-linked.