Campbell Biology: Concepts & Connections 7th Edition solutions

Campbell Biology: Concepts & Connections 7
Using examples, explain this statement: Vertebrate skeletons are variations on a theme. 1

Campbell Biology: Concepts & Connections 7
Unsaturated fats a. are more common in animals than in plants. b. have fewer fatty acid molecules per fat molecule. c. are associated with greater health risks than are saturated fats. d. have double bonds in their fatty acid chains. e. are usually solid at room temperature. 1

Campbell Biology: Concepts & Connections 7
Of the following functional groups, which is/are polar, tending to make organic compounds hydrophilic? a. carbonyl b. amino c. hydroxyl d. carboxyl e. all of the above 1

Campbell Biology: Concepts & Connections 7
Cows can derive nutrients from cellulose because a. they produce enzymes that recognize the shape of the glucose-glucose bonds and hydrolyze them. b. they rechew their cud to break down cellulose fibers. c. one of their stomachs contains prokaryotes that can hydrolyze the bonds of cellulose. d. their

Campbell Biology: Concepts & Connections 7
A biologist performed two series of experiments on lactase, the enzyme that hydrolyzes lactose to glucose and galactose. First, she made up 10% lactose solutions containing different concentrations of enzyme and measured the rate at which galactose was produced (grams of galactose per minute). Result

Campbell Biology: Concepts & Connections 7
Neurons communicate at synapses. The transmission of signals between neurons or between neurons and effector cells occurs at junctions called synapses. At electrical synapses, electrical signals pass directly between cells. At chemical synapses, the sending (presynaptic) cell secretes a chemical sign

Campbell Biology: Concepts & Connections 7
In photosynthesis, ______ is oxidized and ______ is reduced. a. glucose . . . oxygen b. carbon dioxide . . . water c. water . . . carbon dioxide d. glucose . . . carbon dioxide e. water . . . oxygen

Campbell Biology: Concepts & Connections 7
A glucose molecule is to starch as (Explain your answer.) a. a steroid is to a lipid. b. a protein is to an amino acid. c. a nucleic acid is to a polypeptide. d. a nucleotide is to a nucleic acid. e. an amino acid is to a nucleic acid.

Campbell Biology: Concepts & Connections 7
Enzymes usually function best at an optimal pH and temperature. The following graph shows the effectiveness of two enzymes at various temperatures. a. At which temperature does enzyme A perform best? Enzyme B? b. One of these enzymes is found in humans and the other in thermophilic (heat-loving) bact

Campbell Biology: Concepts & Connections 7
A shortage of phosphorus in the soil would make it especially difficult for a plant to manufacture a. DNA. b. proteins. c. cellulose. d. fatty acids. e. sucrose.

Campbell Biology: Concepts & Connections 7
A chorus of frogs fills the air on a spring evening. The frog calls are courtship signals. What are the functions of courtship behaviors? How might a behavioral ecologist explain the proximate cause of this behavior? The ultimate cause?

Campbell Biology: Concepts & Connections 7
Prokaryotes reproduce by binary fission. Prokaryotic cells reproduce asexually by cell division. As the cell replicates its single chromosome, the copies move apart; the growing membrane then divides the cell.

Campbell Biology: Concepts & Connections 7
Sketch a cell with three pairs of chromosomes undergoing meiosis, and show how nondisjunction can result in the production of gametes with extra or missing chromosomes. 1

Campbell Biology: Concepts & Connections 7
Single-celled amoebas and bacteria are grouped into different domains because a. amoebas eat bacteria. b. bacteria are not made of cells. c. bacterial cells lack a membrane-enclosed nucleus. d. bacteria decompose amoebas. e. amoebas are motile; bacteria are not.

Campbell Biology: Concepts & Connections 7
Which of the following is an example of a postzygotic reproductive barrier? a. One Ceanothus shrub lives on acid soil, another on alkaline soil. b. Mallard and pintail ducks mate at different times of year. c. Two species of leopard frogs have different mating calls. d. Hybrid offspring of two specie

Campbell Biology: Concepts & Connections 7
A plant biologist observed a peculiar pattern when a tropical shrub was attacked by caterpillars. After a caterpillar ate a leaf, it would skip over nearby leaves and attack a leaf some distance away. Simply removing a leaf did not trigger the same change nearby. The biologist suspected that a damage

Campbell Biology: Concepts & Connections 7
A blue jay that aids its parents in raising its siblings is increasing its a. reproductive success. b. status in a dominance hierarchy. c. altruistic behavior. d. inclusive fitness. e. certainty of paternity

Campbell Biology: Concepts & Connections 7
ATP drives cellular work by coupling exergonic and endergonic reactions. The transfer of a phosphate group from ATP is involved in chemical, mechanical, and transport work.

Campbell Biology: Concepts & Connections 7
Why is it difficult for most plants to carry out photosynthesis in very hot, dry environments such as deserts? a. The light is too intense and destroys the pigment molecules. b. The closing of stomata keeps CO2 from entering and O2 from leaving the plant. c. They must rely on photorespiration to make

Campbell Biology: Concepts & Connections 7
Water balance between cells and their surroundings is crucial to organisms. Cells shrink in a hypertonic solution and swell in a hypotonic solution. In isotonic solutions, animal cells are normal, but plant cells are flaccid.