Answer:
A dichotomous key is a tool created by scientists to help scientists and laypeople identify objects and organisms. ... Dichotomous keys are very useful because they allow non-expert users to identify organisms by directing them to look at the known, important organisms.
Answer:
It is B
Explanation:
Because absorption occurs when the simple nutrient molecules that result from digestion are absorbed into blood or lymph.
Answer: Option A.
Transverse tubules rapidly move the action potential to the interior of the muscle potential.
Explanation:
Transverse tubules are cylindrical pockets found in the plasma membrane of muscle cells. They are formed from phospholipid bilayer or sarcolemma of skeletal or cardiac muscle cells. They have membrane that have large concentration of ion channels,transporters and pump. They permit action potention into the cell and also to a particular structure sarcuplasmic reticulum. They play a role in regulating cellular calcium concentration.
It’s a marine/ sea sponge it is a underwater invertebrate. It is classified as animal . Also Sea sponges do not have cell walls or chloroplast typical of plants, but contain animal cells.
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