Portions of an MRNA strand that do not code for proteins are

A. exons

B. introns

C. caps

D. tails

Which list correctly ranks structures by size, from largest to smallest? prokaryotic cell, eukaryotic cell, virus, gene eukaryotic cell, gene, virus, prokaryotic cell eukaryotic cell, prokaryotic cell, virus, gene virus, gene, prokaryotic cell,

Which occurs at a convergent boundary where one plate moves under another plate? A. ridges B. faults C. volcanoes D. canyons

Which type ecosystem would the governor of U. S state likely not want covered by the U. S Clean water Act A. rivers that crossed state lines B. wetlands wholly within the state C. oceans D. rain forests

How many periods of transition elements are there in the periodic table

Which of the following does not affect atmospheric CO 2 levels of in the natural carbon cycle?

Which of these is a characteristic of climate? A. Changes weekly B. Changes every day C. Reported as a daily forecast D. Reported as a pattern over time

Genetic disorders can result when sister chromatids fail to separate properly. During which phase is this problem most likely to occur? A: g1 phase B:g0 phase C: Cytokinesis D:Mitosis

4. Which change describes a demographic transition? a. a population moves from a high birthrate and death rate to a high birthrate and low death rate b. a population moves from a high birthrate and low death rate to a low birthrate and death rate c.

Changes in genes within a kind do not form a different kind. true or false

This is the energy that comes to Earth from the sun.