Gametophytes that are completely enclosed within the walls of a spore are known as:
A. endosperm
B. endosporic gametophytes
C. micropyles
D. rosettes
E. phragmoplasts
B. endosporic gametophytes
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The ________ is the distance between the specimen and the objective lens when the specimen is in focus.
Fill in the blank(s) with the appropriate word(s).
Answer the following statements true (T) or false (F)
1. Abnormalities in the number of chromosomes, known as nondisjunction, are more common in younger parents. 2. Johann Gregor Mendel posited in his study on inheritance in plants that offspring exhibited an even blending of physical appearance and traits from parents. 3. This statement is false. Mendel posited in his study on inheritance in plants that offspring exhibited traits that are transmitted faithfully from parents to offspring in specific patterns. 4. This statement is false. The process of meiosis was not understood by the scientific community during Mendel’s lifetime. Mendel came to understand his laws of segregation and independent assortment through his meticulous breeding of pea plants with distinct observable traits. 5. An organism can have the genotype for an inherited genetic disease or condition, but never develop that condition.
You are generally not aware of the texture of the cloth of your shirt as it rests on your shoulders, unless someone or something happens to make you think of it. What part of the brain is responsible for filtering out such stimuli?
A) reticular activating center B) primary motor area C) postcentral gyrus D) cerebellum
How would you recognize an antibiotic-producing soil bacterium on a plate crowded with other bacteria? The bacterial colony producing the antibiotic would be __________.
a. surrounded by a clear area b. red or yellow c. star-shaped d. visible as masses called mycelia e. characterized by pseudopods