Most fungi can only reproduce sexually via spores.
a. true
b. false
Ans: b. false
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Another term for the central shaft or main portion of a long bone is the ______
Fill in the blank(s) with correct word
The number of neutral mutations that accumulated in the genomes of two lineages can be used as a ___________to estimate how long ago they diverged.
A. mutation rate B. molecular clock C. phylogenetic tree D. evolutionary ruler E. radiometric measure
Arrange in the correct sequence these components of the mammalian immune system as it first responds to a pathogen. I) Pathogen is destroyed. II) Lymphocytes secrete antibodies
III) Antigenic determinants from pathogen bind to antigen receptors on lymphocytes. IV) Lymphocytes specific to antigenic determinants from pathogen become numerous. V) Only memory cells remain. A) I ? III ? II ? IV ? V B) II ? I ? IV ? III ? V C) IV ? II ? III ? I ? V D) III ? IV ? II ? I ? V
Which of the following phenomena produces magnification?
A) the wavelength of a radiation source B) the refraction of radiation as it passes through a lens C) the thickness of a microscopic specimen D) the numerical aperture of a lens E) the length of an objective lens