The first known sketches of human chromosomes were drawn in
A) 1776.
B) 1814.
C) 1882.
D) 1951.
C) 1882.
You might also like to view...
The inheritance of eye color indicates that
A) many different genes determine eye color, each contributing to different degrees. B) eye color is sensitive to what a pregnant woman eats. C) other characteristics, such as the texture at the back of the eye, can affect the phenotype. D) a person's sex influences inheritance of eye color.
Which of the following is not a characteristic of Saccharomyces cultures?
a. The cells are haploid. b. The cells have a relatively short generation time. c. Cells reproduce asexually by budding. d. The cells can be induced to reproduce sexually. e. All answers are true of Saccharomyces cultures.
Which class has two shells hinged at the dorsal side and lack a radula?
a. Monoplacophora b. Gastropods c. Scaphopoda d. Bivalvia
While hiking, you must push aside thick branches that are near your face. One of them rips the skin on your arm and you begin to bleed from the cut. Which of the following plays an important role in initially protecting you from infection?
A) nonspecific antibodies B) barriers such as dead skin cells and mucus because they are part of the innate immune system C) increased production of certain hormones and changes in microcirculation D) memory cells because they are part of the adaptive immune system