(a) Agree
It is probable that less sticklebacks will have pelvic spines in Bear Paw Lake, as it is a smaller region without as much competition. Predators may be much lower in such an environment, eliminating a need for such protection. In the ocean, however, there is much biodiversity and competition, so the fish need pelvic spines to protect themselves.
Answer:
When there is an increase in potassium within the cell, depolarization is generated
Explanation:
Depolarization is the intracellular increase of potassium in the cardiac cell, this is how the resting potential is reached, this state of the cell refers to the fact that the cell does not execute or transmit any signal, it is in a refractory state of signals, since it does not capture any, this is how it prepares and recovers for future action potential.
Answer;
Formation of an adenine-uracil base pair
Explanation;
-Mutations are sudden spontaneous changes that occur randomly in the genome or genetic make up of an organism. These changes occurs in our DNA sequence, either due to mistakes when the DNA is copied or as the result of environmental factors such as UV light and cigarette smoke.
-Mutations range in size; they can affect anywhere from a single DNA building block (base pair) to a large segment of a chromosome that includes multiple genes.
-Mutations happen for several reasons which includes; failure of DNA to copy accurately, external influences or factors such as specific chemicals and radiations.
Answer:
a) water will move from the cell into the beaker acroas the cell membrane
b) solutes will diffuse into the cell
Explanation:
a) Osmosis is the phenomenon that describes the movement of water from a region of low solute concentration (high water concentration) to a region of high solute concentration (low water concentration) across a semi-permeable membrane. In this case, since the inside of the cell contains a lesser concentration of solute (150mm), water containing dissolved solutes will move osmotically into the solution of the beaker, which has a higher concentration of solute (500mM) via the cell membrane (semi-permeable membrane).
b) Diffusion involves the movement of particles or molecules from a region where they are highly concentrated to a region where they are less concentrated. In this case, solutes/ions will diffuse from the beaker (outside the cell) containing 500mM of solute INTO THE CELL containing 150mM of solute.
