An opportunistic pathogen_____
a. can cause disease when it is transferred to another site in the body
b. only causes disease in immunocompromised individuals
c. is a part of the resident biota
d. is another term for true pathogen
e. usually chooses not to cause disease
a. can cause disease when it is transferred to another site in the body
c. is a part of the resident biota
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Which of the following statements is true regarding the vascular cambia of ancient (extinct) lycophytes? Select all correct choices
A. Ancient lycophytes did not possess vascular cambia. B. Ancient lycophytes had vascular cambia that formed only secondary phloem. C. Ancient lycophytes had vascular cambia that formed only secondary xylem. D. Ancient lycophytes had vascular cambia that formed both secondary xylem and secondary phloem.
A human egg can only be fertilized in the ____
a. oviduct b. ovary c. uterus d. cervix e. vagina
In Drosophila, a narrow, reduced eye is called a bar-eye. It is due to a dominant X-linked allele (B),
while the full wild-type is due to the recessive gene (B+). Give the F1 and F2 genotypic and phenotypic expectations of a cross of a homozygous wild-type female with a bar-eyed male. What will be an ideal response?
Plants first colonized the land during the Mesozoic Era
a. true b. false