Please help I’m being timed Scientists have several theories about magma hotspots and mantle plumes. They are theories because neither can be observed within the Earth's layers. The model represents the scientific theories about the origin and activities associated with a hotspot. Select which statement is NOT an accurate description of either the origin or activities of magma hotspots?
A) Hotspots originate in the mantle.
B) Hotspots often result in the formation of islands.
C) Hotspots are often found in areas of seafloor spreading.
D) Mantle plumes are magma that shoot up from a hotspot through the crust.

Assume that a student is given two different models of bacteria, with one model consisting of big bacteria and the other consisting of small bacteria. how can the student demonstate the theory of endosymbiosis using the models

In german cockroaches, curved wing (cv) is recessive to normal wing (cv+). bill, who is raising cockroaches in his dorm room, finds that the frequency of the gene for curved wings in his cockroach population is 0.6. in his friend joe’s apartment, the frequency of the gene for curved wings is 0.2. one day joe visits bill in his dorm room, and several cockroaches jump out of joe’s hair and join the population in bill’s room. bill estimates that, now, 10% of the cockroaches in his dorm room are individual roaches that jumped out of joe’s hair. what is the new frequency of curved wings among cockroaches in bill’s room? 0.69 0.4 0.5 0.31 0.20

An example of internal feedback working to maintain homeostasis is your a. decreased respiration rate when you are studying b. decreased heart rate when you are sad c. increased respiration rate when your muscles need more oxygen d. increased heart rate when your lungs need more oxygen