the most important to the survival of the ecosystem is sunlight
Pioneer species are the first organisms to live in an area
Some examples of a pioneer are:
•bunch grass
•milkweed
•queen Anne’s lace
•Sphagnum moss
•sedge
•pitcher plant
Answer:
B. Guyot
Explanation:
What are guyots?
- Guyots are very similar to seamounts, but they have a flat surface on the top rather than a pointy one. The image shown on the question is a guyot, as it's a seamount with a flat top.
What are seamounts?
- Seamounts are basically underwater mountains on the ocean floor.
Have a lovely rest of your day/night, and good luck with your assignments! ♡
Complete question:
The endplate potential (EPP) at the frog neuromuscular junction occurs because ACh simultaneously increases the conductance of the postsynaptic membrane to Na and K
Answer:
TRUE
Explanation:
The Acetylcholine neurotransmitter is released from the presynaptic cell by the process of exocytosis.
Once the molecule is in the intercellular space, it moves forward the postsynaptic membrane to join its receptor in the motor plate.
Once the joining has occurred, the receptor acquires a channel shape allowing the ion transference that will make possible the modification of the action potential. Ions traffic will consist of the pass of sodium and calcium to the interior of the cell and potassium to the exterior. Quantitatively, the interchange Na-K is the most significant.
K+ follows a concentration gradient, while Na+ follows an electrochemical gradient. The interchange results in an increase of positive charges in the interior of the muscular cell.
Whenever there is a sufficient number of Acetylcholine receptors are active, the depolarization threshold of the motor endplate is exceeded. This activates an action potential that extends to the rest of the muscle membrane.
Explanation:
Evolution involves changing the hereditary characteristics of a population through generations. These traits are the expression of genes that are passed on to offspring during reproduction.
