Answer:
In cells, some molecules can move down their concentration gradients by crossing the lipid portion of the membrane directly, while others must pass through membrane proteins in a process called facilitated diffusion.
Explanation:
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Answer:
Cell membranes are selectively permeable which means it allow certain molecules to move across it into and out of the cell. Cells need to be able to transport these substances to live and grow.
Transport of ions, water maintains the osmotic pressure of the cell. Transport of sugars like glucose is necessary to generate energy for the metabolic activities of the cell. Gases like CO2 are waste products of metabolic reaction which are removed by the cell through the cell membrane. Amino acids are required to make proteins.
Transport across cell can occur through active and passive transport and transport of these substance are necessary for a cell to live and function properly.
Living things:
-made of cells
-reproduce
-react to environment & surroundings
-adapt
-get & use energy
-grow and develop
Answer:
A = rough er
B = chloroplast
D = Cytoplasm
C = most likely a lysosome
E = cell wall
Answer:
The correct answer is option E. a flavivirus.
Explanation:
A flavivirus is a virus that is found in primarily by mosquitoes and tick or other arthropods. These are the virus that contains single-stranded enveloped RNA. These mosquitoes or ticks can infect humans with these flaviviruses. These viruses cause diseases that are characterized by high fever, rashes.
The epidemic can cause life-threatening diseases such as dengue, yellow fever, tick-borne encephalitis.
Thus, the correct answer is option E. a flavivirus.
