BSC 2011C Exam 2

hydrae, anemones, and jellyfish are in the phylum

Cnidaria

which of the following animals are not arachnids

barnacles

the kind of body symmetry created when only one axis divides the body into two halves is called

bilateral symmetry

Bivalves differ from gastropods in that:

bivalves are covered by a 2-sided shell connected by a hinge

You examine a 1-inch-tall plant in the woods. This plant is part of a mass of similar small plants covering an area of several square feet. It is very flexible and does not easily stand upright by itself. Upon examining the tiny, flat, leaf-like structures of this plant, you see no veins. There is no evidence of seeds, but at the end of a little stalk on the end of the plant, there is some sort of spore-bearing structure. This plant is probably a(n):

bryophyte

Which group of land plants is most restricted to moist environments?

bryophytes

which group of land plants is most restricted to moist environments

bryophytes

Water flow through a sponge takes the following pathway:

incurrent pores-->central cavity-->osculum

An example of antagonistic hormones controlling homeostasis is

insulin and glucagon in glucose metabolism

The space along a plant stem between adjacent branches (or leaves) is called:

internode

fruit production requires precious resources. what important benefit does fruit provide

is a mean of dispersal of seeds

coral bleaching

is caused by environmental stress such as changes in ocean temperature or pollution

Which of the following is FALSE about the Casparian strip?

it partially surrounds cells within the endodermis

A pollen grain is actually the

male gametophyte

a fruit is a

mature ovary

Meiosis in seed plants produces a ________, which eventually gives rise to an egg in an unfertilized seed.

megaspore

________ results in the production of spores in plants.

meiosis

Plant cells that are actively dividing are ___ cells

meristem

Plant cells that are actively dividing are ________ cells.

meristem

Sea anemones have no:

mesoderm

Which of the following undergoes meiosis during the development of pollen grains?

microspore mother cell

What type of cell activity occurs in the meristem regions of plants?

mitosis

You discover a plant that has unusual fruit around the seed and leaves with parallel veins. In which of the two major groups of flowering plants does it belong, and why?

monocots, because it has parallel veins

which evolutionary plant innovation eliminated the need for sperm to swim through water in order to fertilize an egg, resulting in plants being truly adapted for reproduction on land

pollen

in angiosperms, the male gametophyte is

pollen grain

what is the main difference between primary and secondary growth

primary growth increases the height of a plant, while secondary growth increases the girth ( width ) of the plant

Which of the following is NOT a characteristic of a gastropod?

reproduce asexually

Why do mosses and liverworts need to live in a moist environment?

reproduction

byrophytes absorb water through

rhizoids

Many root epidermal cells grow projections called ________, which extend from their surface and help in the absorption of water and minerals.

root hairs

The phylum Nematoda includes which of the following very common organisms, some of which are parasitic and most of which are often found in soil?

roundworms

____ are characterized by having a pseudocoelom

roundworms

which of the following organisms is not in phylum Mollusca

sea anemone

Embryonic plants wrapped up in nutritive tissue and a protective coat are called:

seeds

embryonic plants wrapped up in nutritive tissue and a protective coat are called

seeds

the non-cellular components in sponges that hold the cellular components together are called

spicules

The simplest multicellular animals that have only a few different cell types are:

sponges

Which of these groups is characterized by a lack of symmetry ( neither radical nor bilateral )

sponges

the only animals that lack tissues are

sponges

sporophyte produces

spores by meiosis

in an alternation of generations life cycle, what alternates

sporophytes and gametophytes

within the mollusks, only the cephalopods have a

closed circulatory system

Dermal tissue forms:

epidermis

which of the following weather conditions would you expect to have the greatest negative impact on the sexual reproduction of ferns and mosses

excessively dry for several days

a(n) ______ provides support and protection to arthropods

exoskeleton

In flowering plants, the unferfertilized ovule contains the:

female gametophyte

in flowering plants, the unfertilized ovule contains the

female gametophyte

if you were hiking and wanted to show off your understanding of the difference between gymnosperms and angiosperms, what characteristics could you see with your naked eye that would help you impress your friends

flowers or cones

Angiosperms with wind-dispersal pollen include:

grasses

which group of plants was the first to produce seeds

gymnosperms

Which of the following is FALSE about an exoskeleton?

has to be molted when the animal is growing

segmented worms differ from roundworms and flatworms in that they

have closed circulatory systems; are divided into many identical body segments ( A and C )

which of the following are seedless vascular plants with silica in the wall and tiny, scale-like leaved

horsetails

in Dicots, the shoot tip is protected by

hypocotyl hook

Echinoderms

include sea stars, sea urchins, and sea cucumbers

Which of these is an advantage to a plant that moved onto land?

increased sunlight availability

The function of the gills in bivalves is to:

A and B trap food and pass it to the mouth filter oxygen out of the water for breathing

Segmented worms differ from roundworms and flatworms in that they:

A and C have closed circulatory systems are divided into many identical body segments

A crayfish is a member of the phylum:

Arthropoda

A sea urchin is a member of the phylum:

Echinodermata.

Parasitic tapeworms are members of the phylum:

Platyhelminthes

parasitic tapeworms are members of the phylum

Platyhelminthes

Which of the following organisms is NOT in phylum Mollusca?

Sea Anemone

in vascular plants, sugar solutions are transported through tubes constructed of cells called

Sleve-tube elements

Spores and gametes are both haploid reproductive cells. What is the difference between them?

Unlike gametes, spores germinate and grow into a multicellular haploid gametophyte.

A multicellular organism whose cells lack cell walls and obtains energy by eating other organisms is a(n):

animal

a flowering plant produces pollen in the

anther

Flowers that make only pollen lack:

carpels

flowers that make only pollen lack

carpels

the American holly tree requires a " male" tree and a " female " tree to produce red berries in the winter. this indicates that the male flowers lack ____ and the female lacks _____

carpels, stamens

all of the following are major functions of roots except

carrying out photosynthesis

your job is to classify a newly discovered animal species. your initial studies reveal that your specimen has tissues but lacks organs; has no head, body cavity, or segmentation; and has radial symmetry. to what phylum does this animal belong

cnidaria

The ________ theory explains the movement of water and minerals through xylem.

cohesion-tension theory

The currents of water (containing food) that pass through a sponge are maintained by:

collar cells

All of the following are true of xylem except

companion cells provide nutrition for tracheids

All the following are TRUE of xylem EXCEPT:

companion cells provide nutrition for tracheids.

The gymnosperms that have needles are called:

conifers

A cnidarian that builds a calcium carbonate skeleton is a(n):

coral

the first leaves produced by an embryo while still inside the seed are

cotyledons

to limit water loss, land plants developed

cuticle

Which of the following are gymnosperms?

cycads, gingkos, and conifers

A ________ is an organism whose anus forms before its mouth during embryonic development.

deuterostome

Pollen and seeds evolved in response to:

dry land environments

In flowering plants, the unfertilized ovule contains the:

embryo

Which of the following statements is true? -millipedes are carnivorous insects -myriapods breathe using tracheae -air enters an insect through openings in its exoskeleton called tracheae -insects have 4 pairs of legs -arachnids have one pair of antennae attached to their heads

myriapods breathe using tracheae

Bacteria-containing nodules in the roots of legume plants aid in the fixation of:

nitrogen

bacteria-containing nodules in the roots of legume plants aid in the fixation of

nitrogen

which of the following characteristics helps differentiate between a monocot and a dicot

number of flower parts

Which of the following characteristics helps differentiate between a monocot and a dicot?

number of flowering parts

what type of tissue transports sugars ( the product of photosynthesis ) to the rest of the plant

phloem

which of the following is not a segmented worm

planarian

Both plants and green algae store food as:

starch

on which of the following structures does pollen land during pollination

stigma

The female reproductive structure, the carpel, consists of:

stigma, style and ovary

an opening in the epidermis of the leaf through which water evaporates is called a

stoma

in monocots, the shoot tip is protected by

the coleoptile

the male flower reproductive structure, the stamen, consist of

the filament and anther

The male flower reproductive structure, the stamen, consists of:

the filament and anther.

In cnidarians

the motile life stage is medusa

Which of the following statements is FALSE about flatworms?

they are in phylum Annelida

an arthropod embryo has ____ germ layer(s)

three

which of the following is not a crustacean

tick

An animal like a grasshopper has an elaborately branching system of tubes within its body that it uses for gas exchange. These tubes are called

tracheae

Water-conducting cells that are narrow and have small central cavities are called:

tracheids

the function of the gills in bivalves is to

trap food and press it to the mouth; filter oxygen out of the water for breathing ( A and B )

The fruit in the photo has evolved for dispersal by:

wind

a fertilized egg is a

zygote