The correct answer is letter B. The carpel of most flowers is made up of the stigma, the style, and the ovary. Carpel refers to the female reproductive organ of a flower, it is necessary in the increase of the population of plants and the growth of matures seeds that eventually become fruits that can be eaten or consumed by organisms.
Answer:
"As a molecule moves through the plasma membrane it passes through <em>a hydrophilic layer of phospholipid heads then a hydrophobic layer of phospholipid tails and then another hydrophilic layer of phospholipid heads".</em>
Explanation:
Biological membranes are formed by two lipidic layers, proteins, and glucans.
Lipids characterize for being amphipathic molecules, which means that they have both a hydrophilic portion and a hydrophobic portion at the same time. These molecules have a lipidic head that corresponds to a negatively charged phosphate group, which is the polar and hydrophilic portion. They also have two lipidic tails that correspond to the hydrocarbon chains -the apolar and hydrophobic portion- of the fatty acids that esterify glycerol.
Membrane lipids are arranged with their hydrophilic polar heads facing the exterior and the interior of the cells, while their hydrophobic tails are against each other, constituting the internal part of the membrane.
Through this lipidic bilayer, some molecules can move from one side of the cell to the other, which happens because of concentration differences. When this occurs, molecules must pass through the hydrophilic layer of phospholipid heads then through the hydrophobic layer of phospholipid tails and then again through another hydrophilic layer of phospholipid heads.
Answer:2000x
Explanation:The maximum resolution, or resolving power (the ability to distinguish two points) of a compound light microscope is 0.2 µm; maximum magnification is 2000x.
Answer: C. Strained
Explanation:
The diplomatic neutrality of the United States was tested during the Napoleonic Wars . The warring nations of Britain and France both imposed trade restrictions in order to weaken each other's economies. These restrictions also disrupted American trade and threatened American neutrality.
