What is the sarcoplasmic reticulum? how does it aid in the stimulation of muscle contraction?

Akrabby blind whale has married pearl who has normal vision. oneof their two sons is also colorblind. what arr the genotypes of the parents?

What's wrong with this ecological pyramid? (multiple choice)1. secondary consumers should be at the bottom of the pyramid2. the sun has an arrow leading to decomposers 3. primary consumers should come after the sun4. energy retained should increase from the bottom to the top5. the sun should be at the bottom of the pyramid

Omg substrates with the same size and shape as the active site will bind to the enzyme. why is the key labeled the “bad” substrate?