Answer:
B
Explanation:
competing with stronger organisms makes it difficult for the squirrel to be invasive
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Answer:
the average annual rainfall.
Explanation:
It is defined as the annual amount of precipitation for a location over a year.
Fresh water community obtained its storage as precipitation from the atmosphere of rain, mist and snow..
The amount of rainfall of a community depends on the location.A typical rain forest receives average of 50,- 260 inches of rain per year.
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Explanation:
1)The cell membrane functions as a semi-permeable barrier, allowing a very few molecules across it while fencing the majority of organically produced chemicals inside the cell. Electron microscopic examinations of cell membranes have led to the development of the lipid bilayer model (also referred to as the fluid-mosaic model). The most common molecule in the model is the phospholipid, which has a polar (hydrophilic) head and two nonpolar (hydrophobic) tails.
2) simple diffusion across the cell plasma membrane. The structure of the lipid bilayer allows small, uncharged substances such as oxygen and carbon dioxide, and hydrophobic molecules such as lipids, to pass through the cell membrane, down the concentration gradient is , by simple diffusion.
3) some molecules, such as carbon dioxide and oxygen, can diffuse across the plasma membrane directly, but others need help to cross its hydrophobic or however, because they are charged the polar, they can't cross the phospholipid part of the membrane without help .
4) during fission a copy of the DNA is made and attached to the cell membrane as well. As this cell elongate in preparation for fission, the two DNA copies are pulled apart two opposite ends of the cell. New membrane material is deposited between the two ends of the cell, and a new wall grows between them .
5) UMASS STEM-ED From Bubbles to Cell Membranes Workshop. Bubble ... dynamic nature which can't be properly appreciated in a static textbook. ... the small thread through one of the straws.
6) example of passive transport and active transport across a cell membrane so, cell membranes are semipermeable meaning they have control over what molecules can or cannot pass through. Some molecules can just drift Inn.
The substance that helps keep the integrity of the bacterial cell wall intact is known as the peptidoglycan. Others also refer to is it as murein or mucopeptide. The bacterial cell wall is necessary for survival because of the high internal pressure present inside of bacteria. Under normal conditions, if the cell wall is removed the bacterial cell will burst.
The peptidoglycan is a layer that can be used to distinguish gram positive bacteria from gram negative ones. G(+) bacteria have a thick layer of this while G(-) have a thinner ones.
A skin cell in G2 of interphase has twice as much DNA as it had in G1.
A skin cell is somatic cell that undergoes mitosis (cell division). Mitosis together with interphase is part of the cell cycle.
Interphase also known as a phase for the preparation for division consists of three phases:
• G1- cell becomes larger, copies organelles, and makes the building blocks necessary for the new cell
• S-cell copies its DNA in the nucleus (that is why G2 phase has twice as much DNA as it had in G1)
• G2 – cell continues to grow, makes proteins and organelles.
During the mitosis, the cell separates its DNA into two and divides its cytoplasm, forming two new daughter cells.
