Which of the following describes a cell structure that a gram-negative bacterium has that a gram-positive bacteria does not have? a. a membrane-enclosed nucleus in which dna is stored and protected b. a membrane-bound mitochondrion in which energy for the cell is made c. an electrically charged sugar molecule that is attracted to sodium ions d. an extra layer that is outside the peptidoglycan layer of the cell wall

The steps in the formation of extrusive igneous rocks are listed below in an incorrect order: 1. rock melts due to high temperature. 2. rock is buried deep under earth's surface. 3. magma is forced out of earth's surface during volcanic eruption. 4. lava cools and crystallizes to igneous rock. which of these best shows the correct order of steps in the formation of extrusive igneous rocks? 1, 3, 4, 2 2, 1, 3, 4 3, 4, 2, 1 4, 2, 1, 3

Is this mrna or rna need need the answer in a hurry

The most famous fossil called archaeopteryx is which of the following? a dinosaur a fern a fish a bird