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Sea urchins can live near CO2 vents. They create buffer in intercellular fluid that maintains their internal pH constant to be able to survive in a highly acidic environment. What type of organism are they in terms of pH regulation?

Variety of receptors in the adaptive immune system arises because

Which organ in vertebrates secretes enzymes that help digestion in the duodenum?

Which is the main function of flowers?

Match the enzymes with the molecules they help break down

A cell membrane can undergo a rapid change from the resting potential to carrying an action potential. Which process enables this change?

You discovered a new fossil of an organisms that had many molars and those molars were very robust, while it had almost no canines. What diet do you think that organism had?

Why do we need to add fertilizer/compost to the plants in our yards?

Why do only certain organs called the target organs respond to the presence of a specific hormone?

Match the enzymes with the molecules they help break down