In contrast: Protozoans are organisms usually made up a single cell and are all microscopic. All protozoans are eukaryotes. They have different responses when faced with adverse or unfavorable environmental conditions. Examples include:<span>Amoeba: During adverse environmental conditions, many amoeba undergo encystment that is they become cysts. The amoeba becomes circular, loses most of its water and secretes a thick membrane that serves as a protective covering. When the environment is again suitable, the covering of the cyst ruptures and the amoeba emerges. </span><span>Bacteria: In unfavorable environmental conditions some bacteria such as clostridium form spores, specifically endospores. An endospore is an extremely resistant, tough, dormant, non reproductive cell structure that can withstand desiccation, extreme temperatures, chemical disinfectants and starvation. The bacteria survive in this mode until better growth conditions return</span>
Sickle cell anemia is caused by a mutation in the gene that tells your body to make the iron-rich compound that makes blood red and enables red blood cells to carry oxygen from your lungs throughout your body (hemoglobin)
Diffusion is a passive process of transport. A single substance tends to move from an area of high concentration to an area of low concentration until the concentration is equal across the space.
A mutation that cause changes to short stretches of nucleotides. These mutations affect the specific genes that provide instructions for various functional molecules, including protein . changes in these molecules can have impact on any number of an organism's physical characteristics
I believe the correct answer is true. A species accumulation curve can be used as a tool to approximate local, or alpha, diversity. The shape of this curve depends largely on the order of the samples processed. Hope this answers the question.
