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1. The duck-billed platypus and other monotremes differ from other mammals in that they? a. are aquatic. b. have mammary glands. c. lay eggs. d. have hair. 2. The vertebrate group that describes all jawed vertebrates with two pairs of limbs is the? a. craniates. b. mammals. c. tetrapods. d. amniotes. 3. Lampreys differ from fishes in that lampreys a. lack a backbone. b. lack an endoskeleton. c. lack jaws. d. possess a backbone and skull. 4. A biologist visited a fish market and found a fish she did not recognize. To place the unknown fish into a major group, she would need to look at _____. a. only the structure and composition of the skeleton b. the structure and composition of the skeleton and the structure and arrangement of the fins c. only the structure of the fins d. whether a lateral line system was present 5. A key derived character of sharks and rays that distinguishes them from ray-finned fishes is a. calcified (hard) bones. b. jaws and a swim bladder. c. vertebrae. d. a skeleton made of cartilage 6. Which animals are ectothermic? a. turtles and lizards b. birds and mammals c. lizards and birds d. frogs and mammals 7. Which animals are ectothermic? a. turtles and lizards b. birds and mammals c. lizards and birds d. frogs and mammals 8. Which of the following statements best summarizes the difference between ectothermic and endothermic organisms? a. Ectotherms absorb external heat, but endotherms use metabolic heat to maintain a warm, steady body temperature. b. Ectotherms are warm-blooded, but endotherms are cold-blooded. c. Endotherms are warm-blooded, but ectotherms are cold-blooded. d. Endotherms control their temperature, but ectotherms have no control over their temperature.
why the enzyme is an "organic protein". A friend of yours has just received a new dietary supplement purchased online.
An insufficiency of antidiuretic hormone can cause an individual to develop diabetes insipidus. What do you forecast the clinical manifestations of this disease to be?
Medical history elicits the facts that she lost her husband six months previously, has been extremely depressed, and is taking sleeping pills and not eating properly. What would doctor hypothesize about the probability of senile dementia in this case..
Assume you survey a population in Hardy-Weinberg (H-W) linkage equilibrium with two loci C,c and D,d. The estimated frequencies of these alleles are:
The drug methotrexate has been reported to cause fetal death and/or congenital anomalies, therefore, it is not recommended for women of childbearing potential.
Diagnosis of CML can be done using a Southern blot to detect the junction fragment. In early stages of CML most patients are heterozygous for the genome rearrangement,
Widespread resistance of malarial parasite to drugs like chloroquine has prompted attempts to develop a malarial vaccine to combat malaria. Explain why is it difficult to develop an effective malaria vaccine?
In rabbits the dominant allele of a gene produces spotted body color, and the recessive allele solid body color. The dominant allele of another gene produces short hair, and the recesssive allele long hair.
Discuss how do you counter the same person who says that if the process does occur in nature, there is no such thing as natural selection, but it requires a designer to carry out those specific steps?
Identify an animal or plant that you can find somewhere nearby within some hours - it can live in the city, town, country, a lake, ocean, mountain, etc as either an r or a K
Assume if centrifugation of a cell suspension at a rotation speed of 1200 rpm takes three min, Determine how much time will be required to achieve the same degree of cell.
Nutrients from the food we eat must be absorbed into bloodstream so that they can be delivered to various parts of the body.
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