1) which statement is not true about water uptake in a plant root?
a. water enters the root from the soil by osmosis.
b. water enters the cytoplasm of the root hairs by active transport.
c. water travels by diffusion through the cell walls of the epidermis and cortex.
d. water must enter the cytoplasm of the endodermal cells to get past the casparian strip.
2) which of the following excretory structures is used by birds?
a. urethra
b. cloaca
c. nephridia
d. flame cells
3) which of the following statements about skeletons is not true?
a. the skeleton of a vertebrate is an endoskeleton.
b. the skeleton of an arthropod is an exoskeleton.
c. the skeleton of a clam is an exoskeleton.
d. all exoskeletons must be shed as the animal grows.
e. an earthworm has a fluid-filled cavity that acts as a hydrostatic skeleton.
4) which of the following processes does not take place during translation?
a. growth of a polypeptide chain.
b. attachment of a ribosome to mrna.
c. binding of two trna molecules per ribosome.
d. liberation of polypeptide from the ribosome.
e. production of mrna.
incorrect
5) what structure is required for an organism to be classified as an autotroph?
a. chloroplast
b. mitochondria
c. nucleus
d. golgi body
6) an ecologist may study
a. the human impact on the earth’s environment.
b. the different types of organisms living near a hydrothermal vent and how they
interact.
c. the affect of a particular pesticide on a food chain.
d. how populations are restricted by environmental resistance.
e. all of the choices are correct.
7) which of the following structures attaches muscle to the bone?
a. ligaments
b. joints
c. tendons
d. adipose tissue
e. sarcomere
8) if you have picked a bouquet of anther-less flowers, you have picked
a. male gametophytes retained within the body of sporophytes.
b. female gametophytes retained within the body of sporophytes.
c. sporophytes retained within the body of microgametophytes.
d. sporophytes retained within the body of megagametophytes.
e. microgametophytes retained within the body of megagametophytes.
9) fossils like archaeopteryx offer evidence linking
a. reptiles and mammals.
b. fish and amphibians.
c. birds and mammals.
d. birds and reptiles.
e. amphibians and reptiles.
10) primary succession takes much longer than secondary succession because it
involves
a. colonization by more k-selected species.
b. time for development of the soil.
c. more time for development of a seed bank.
d. colonization by organisms that are farther away.
e. redevelopment of the atmospheric gases.
11) identify the following molecule:
a. amino acid
b. hydrocarbon
c. carbohydrate
d. alcohol
e. cholesterol
12) which of the following statements is not correct about a circadian rhythm?
a. these rhythms tend to persist even in the absence of daily light cues.
b. an example is the opening of stomates in the morning and their closing at night.
c. if plants are maintained in total darkness or total light, their circadian rhythm acts on
a faster time scale.
d. the primary usefulness of circadian rhythms seems to be to measure day-length
changes so plants respond appropriately to seasonal environmental changes.
incorrect
13) arrange the following steps of mammalian inspiration (inhalation) in the proper
sequence.
1> step 2 a. diaphragm contracts and moves down.
2> step 1 b. rib cage moves up and out.
3> step 4 c. thoracic cavity expands and thoracic pressure decreases.
4> step 3 d. air flows into the lungs.
14) chloroplasts are to ____________ as ___________ are to aerobic respiration.
a. stroma, cristae
b. photosynthesis, mitochondria
c. thylakoid membranes, matrix
d. protein synthesis, lysosomes
15) which of the following health disorders can be treated with ex vivo gene therapy?
a. liver cells lack a protein that enables it to remove cholesterol from the blood which
leads to high levels of cholesterol in the blood. this can increase the patients
susceptibility to heart attacks.
b. the liver cells lack a protein that causes it to produce excessive cholesterol which
leads to high levels of cholesterol in the blood. this can increase the patients
susceptibility to heart attacks.
c. a gene is implanted that will code for the correct transmembrane carrier of the
chloride ion.
d. genes are implanted that make healthy cells more tolerant to chemotherapy while
making the tumor cells more susceptible to chemotherapy
16) a solution with a ph of 6 has ________ times _________ oh- than a solution with a
ph of 10.
a. 40; more
b. 4000; less
c. 104; less
d. 4; less
e. 10-4 more
17) the _____ develops into the fetal portion of the placenta.
a. amnion
b. archenteron
c. chorion
d. yolk sac
e. allantois
18) which substances are on the basic side of the ph scale?
a. baking soda, oven cleaner & human blood
b. baking soda, oven cleaner & urine
c. tomatoes, oven cleaner & human blood
d. beer, vinegar & black coffee
e. great salt lake, oven cleaner, tears
19) the mesophyll layer of leaves is important to plants because
a. it keeps the plant from drying out.
b. it anchors the plant to the soil.
c. most of the water needed for photosynthesis is absorbed here.
d. most of the photosynthesis occurs here.