What is the diagnostic structure produced by Paracoccidioides brasiliensis?
A) spiny spores visible by brightfield microscopy
B) "steering wheel" or "captain's wheel" buds visible by brightfield microscopy
C) spherules observed in tissue samples
D) yeast buds that are not dissolved by KOH
E) dimorphism when grown in the lab
B
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Based on the table of average intron frequency given below, predict the relative order of genome size for these four eukaryotic organisms
Organism Average Intron Frequency Cryptosporidium parvum 0 Plasmodium falciparum 1 Arabidopsis thaliana 5 Homo sapiens 8 A) Homo sapiens > Arabidopsis thaliana > Plasmodium falciparum > Cryptosporidium parvum B) Cryptosporidium parvum > Plasmodium falciparum > Arabidopsis thaliana > Homo sapiens C) Homo sapiens > Cryptosporidium parvum > Plasmodium falciparum > Arabidopsis thaliana D) Intron frequency cannot be used to predict genome size in eukaryotes.
In a survivorship curve, a type I species, like a human or elephant, is a species that has
A. the highest probability of dying at a very young age. B. a strong possibility of becoming extinct in a relatively short period of time. C. the highest probability of dying as it reaches its maximum life span. D. an equal probability of dying at any age. E. an extremely short life span.
What is a cirucmcision?
A) The surgical removal of the uterous B) The surgical sterilization of a male by cutting the vas deferens C) The surface removal of the foreskin of the penis D) The surgical sterilization of a female by blocking the oviducts
Mendel's primary contribution to our understanding of genetic inheritance was
a. the idea that genes are found on chromosomes. b. providing a mechanism that explains patterns of inheritance. c. describing how genes are influenced by the environment. d. determining that DNA contains information that codes for proteins. e. None of the above