Which type of connective tissue is found in the external ears?
A. Dense regular collagenous tissue
B. Hyaline cartilage
C. Fibrocartilage
D. Elastic cartilage
E. Dense irregular elastic tissue
Answer: D
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The largest quantities of keratin are found in the epidermal layer called the stratum
A) corneum. B) lucidum. C) basale. D) granulosum. E) spinosum.
Bicarbonate enters and leaves the vertebrate red blood cell by
A) Diffusion. B) Bicarbonate pump. C) Bicarbonate channel. D) Chloride-bicarbonate exchanger.
What is the cessation of menstruation referred to as?
A. Menopause B. Pubarche C. Climacteric D. Menarche
Of the different sources of genetic variability, which one could be defined as permanent, transmissible changes to the DNA coding sequence often caused by outside environmental factors?
A) independent assortment
B) crossing over
C) random fertilization
D) mutation