Which part of the nephron acts as a countercurrent multiplier?
A. loop of Henle
B. proximal convoluted tubule
C. distal convoluted tubule
D. collecting duct
E. All of these structures act as
countercurrent multipliers.
A
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Mendel's observation of the segregation of alleles in gamete formation has its basis in which of the following phases of cell division?
A) prophase I of meiosis B) anaphase II of meiosis C) metaphase II of meiosis D) anaphase I of meiosis E) anaphase of mitosis
Achondroplasia, a hereditary form of dwarfism, is an autosomal dominant disorder; however homozygous dominant
individuals either die before birth or very shortly thereafter. The homozygous recessive condition is normal. A dwarf couple decide to have children. Use this information to answer the following question:Of the children of this couple who survive, what is the probability that they will be normal?
a. 0 b. ¼ c. 1/3 d. 2/3 e. ½
Sarcomeres consist of a zone and several bands
Actin and myosin filaments overlap at the __________ while the __________ is actin filaments alone and the __________ is myosin filaments alone. a. A band; I band; H zone b. H zone; A band; I band c. I band; H zone; A Band d. A band; H zone; I band e. H zone; I band; A band
Coral reefs are made up of genetically alike coral polyps. New polyps develop as offshoots from the parental polyp. What type of reproduction do coral polyps use?
A) budding B) fission C) fragmentation D) sexual reproduction