Dictyostelium discoideum is an unusual organism, one that straddles the boundary between the unicellular and the multicellular. Its feeding phase consists of individual amoeba-like cells that move independently, feeding on bacteria by phagocytosis. When the food runs out, cells begin to aggregate into a multicelled structure that migrates toward light. The cells differentiate into a base, stalk, and spores; only the spores survive to colonize a new habitat. What is the advantage of forming spores?
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An area where two bones meet is called a
An area where two bones meet is called a
A traditional tattoo injects ink into the lower layers of th…
A traditional tattoo injects ink into the lower layers of the skin. Which of the following would be true of this tattoo?
What is the function of the simple squamous cells found in t…
What is the function of the simple squamous cells found in the glomeruli of the kidney?
What type of feedback is exemplified by the formation of a b…
What type of feedback is exemplified by the formation of a blood clot that results in the rise of blood pressure?
What hypothesis were Ellison and Gotelli testing when they m…
What hypothesis were Ellison and Gotelli testing when they manipulated concentrations of nutrients available to pitcher plants?
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Entamoeba histolytica can cause amoebic dysentery. It moves using pseudopodia, can only feed by phagocytosis, and is unicellular. Entamoeba histolytica is classified as
If you wanted to genetically engineer a goat so that it had…
If you wanted to genetically engineer a goat so that it had finer muscle control than other goats, what would be your goal?
Which is a bone of the lower limbs?
Which is a bone of the lower limbs?
The epidermis of a plant leaf is usually many layers thick a…
The epidermis of a plant leaf is usually many layers thick and carries out most of the photosynthesis in a leaf.