Tuesday
October 21, 2014

Homework Help: Science

Posted by anon on Wednesday, November 6, 2013 at 2:02pm.

1.
The sporophyte generation produces spores that grow into a(n) (1 point)

gametophyte.
gymnosperm.
angiosperm.
pupa.

2.
Placental mammals develop (1 point)

in an egg laid in water.
in a pouch on the motherís body.
inside the motherís body.
inside an amniotic egg.

3.
Angiosperms reproduce with (1 point)

spores.
seeds.
cones.
amniotic eggs.

4.
Bees see blue and purple the best. Over time, some plants have developed blue flower petals and a place for bees to land. How might these features help the plant? (1 point)

These features may scare away animals that dislike bees.
These features may aid in the plantís growth.
These features may prevent the bees from eating the plant.
These features may aid in the plantís reproduction.

5.
The size of an organism is most likely determined by (1 point)

its genes but not its environment.
its environment but not its genes.
its genes and its environment.
neither its genes nor its environment.

6.
Most female frogs lay their eggs in water. Male frogs release their sperm into the water to fertilize the eggs. This is an example of (1 point)

internal fertilization.
external fertilization.
metamorphosis.
alternation of generations.

7.
Male bowerbirds spend much of their time decorating their nests. What is the most likely reason the males would do this? (1 point)

to cushion the nest for eggs and future chicks
to hide the nest from predators
to make the nest easier to find when the male comes back with food
to attract female bowerbirds who likely choose males with the best decorated nest

9.
Eggs with tough, protective shells developed to (1 point)

allow the eggs to be laid in water.
allow the parents to gather food instead of sitting on the nest.
prevent the embryo from drying out.
keep the embryo warm.

10.
Genetics is one determining factor when it comes to how large an animal can get. What might be another factor? (1 point)

the distance the animal must travel to get clean water
the size of the den or burrow the animal grows up in
the amount of food available to the animal
the amount of exercise the animal gets
my answers are
1.a
2.c
3.b
4.i think b
5.a
6.b
7.d
9.d
10.c

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