Which statement is not true of the zygospore-forming fungi?
(a) They are in the phylum Zygomycota.
(b) Ascospores are found in an ascus.
(c) Rhizopus is a representative genus.
(d) A zygospore is formed after fertilization.
(b) Ascospores are found in an ascus.
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Genetic exchange between 2 homologous chromosomes is called
A. synapsis. B. pleiotropy. C. crossing over. D. allelic exchange. E. independent assortment.
As shown in Figure 25.1 (and reproduced here), atmospheric CO2 levels oscillate over the course of the year. What season would you expect oxygen levels to be highest?
A. summer B. fall C. winter D. spring
In eukaryotes, genetic information is passed to the next generation by processes that include mitosis or meiosis
Which of the explanations identifies the correct process and supports the claim that heritable information is passed from one generation to another? A) During mitosis, DNA replication occurs twice within the cell cycle to insure a full set of chromosomes within each of the daughter cells produced. B) Mitosis, followed by cytokinesis, produces daughter cells that are genetically different from the parent cell, thus insuring variation within the population. C) In asexual reproduction, a single individual is the sole parent and passes copies of its genes to its offspring without the fusion of gametes. D) Single-celled organisms can fuse their cells, reproducing asexually through mitosis to form new cells that are not identical to the parent cell.
Which is an accurate statement about the anatomy of the human excretory system?
a. Bowman's capsule is a network of capillaries inside the glomerulus. b. The proximal tubule is the portion of the nephron tubule farthest from Bowman's capsule. c. The renal cortex, which contains the nephrons, is interior to the renal medulla. d. The loop of Henle is located between the proximal tubule and the distal tubule. e. The distal tubule of a nephron connects with the renal pelvis of the kidney via the ureter.