Most mitochondrial and chloroplast proteins are made within which part of the cell?
A.) golgi apparatus
B.) ER
C.) cytosol
D.) peroxisome
E.) mitochondrion or chloroplast itself
Ans: C.) cytosol
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The half-life of carbon-14 is 5730 years. Approximately how old is a fossil that contains .25g carbon-14 and .75g nitrogen-14?
A. 11,460 years B. 5730 years C. 17,190 years D. 22,920 years E. 28650 years
Members of the plant family Cactaceae (cacti) are native to the Americas and thrive in dry environments. They have a number of specialized adaptations, including reduced leaves, succulent (fleshy) stems for water storage, and spines for defense against herbivores. Some members of the family Euphorbiaceae are native to the African desert and resemble cacti, having similarly reduced leaves, succulent stems, and thorns. Other species in the Euphorbeaceae do not have these traits. Based on this information, what can you say about the morphological traits of Cactaceae and Euphorbiaceae indicated above?
A. They are shared primitive traits. B. They are shared derived traits. C. They are homologous traits. D. They are analogous traits.
Mashing is a process involving ________.
A. carbohydrate hydrolysis B. protein putrefaction C. inoculation D. carbonation
The water vascular system in echinoderms is used for locomotion, water enters the water vascular
system of a sea star through a structure called the
a. ampulla. b. ossicle. c. radial canal. d. ring canal. e. madreporite.