<span>This is an example of convergent evolution. These animals gained these similar antler structures to be able to survive in similar environments. Convergent evolution gives organisms who are unrelated similar characteristics as they evolve. The characteristics are influenced by the organism's similar habitats and are given to them to make sure the organisms are able to adapt to survive.</span>
Crab in Rocky shore By rock pools - deep in ocean as they get older
Typical day - just shuffle along the rocks
To get food - from rock pools use claws to get fish
As they get bigger, they eat protozoa, diatoms and smaller crabs that live on the ocean floor. When the crabs reach 2 to 4 years of age, they move to deeper water where they join the adult crabs that eat worms, clams, mussels, snails and sea urchins. They also eat sand dollars, barnacles, fish parts and algae.
Hard shell is their protection and claws as a defends mechanism
PredAtors - possibly birds while on shore but bigger fish on ocean floor
Answer: natural killer cell
Explanation:
Natural killer cells are referred to as the granular lymphocytes which play vital roles in the immunity against viruses. It doesn't need antigenic activation in order to detect and kill pathogens.
When an enemy cell is present, a natural killer cell secretes perforins, which bore a hole in the enemy cell membrane.
