The majority of DNA in a human can be described as 

A. composed of short interspersed elements.
B. non-coding.
C. simple sequence repeats.
D. segmental duplications.
E. structural.


B. non-coding.

Biology & Microbiology

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A challenge to traditional (pre-1860) ideas about species came from embryology, where it was discovered that __________.

A. mutations have a far more dramatic effect on embryos than on adult organisms B. all animals develop similar embryonic gills C. the more advanced the animal, the more slowly it develops D. embryos of dissimilar organisms, such as sharks and humans, resemble each other

Biology & Microbiology

Briefly describe the structure of compound chromosomes, and explain how their behavior during meiosis can be used to study underdominance

What will be an ideal response?

Biology & Microbiology

Cycads may be characterized as being:a

dioecious and having motile sperm. b. the most primitive flowering plants. c. monoecious and having motile sperm. d. dioecious and having non-motile sperm. e. monoecious and having non-motile sperm.

Biology & Microbiology

You observe a pine with two distinctly different types of cones. The best explanation for this is 

A. the tree was produced by grafting. B. a mutation has occurred in this plant. C. one cone is the male reproductive structure and the other is the female reproductive structure. D. one cone is a gametophyte and the other is a sporophyte.

Biology & Microbiology