Answer ASAP:
What happens when a muscle contracts?
A.) Calcium combines with ATP to produce sarcomeres.
B.)Calcium produces contractions.
C.)Myosin heads attach to and pull on a series of actin-binding sites.
D.)Actin produces myosin and ATP.

Which sentence best describes the relationship between chlorophyll and the chloroplast? a.) chlorophyll is a chemical found in a chloroplast. b.) chloroplast is a chemical found in a chlorophyll. c.) both chlorophyll and chloroplasts are found in animals. d.) both chlorophyll and chloroplasts make carbon dioxide.

What molecule does hemoglobin decay into over time

There are two tomato plantlets one of them is kept in an oxygen chamber with a light source and another is kept in sunlight. both of them are watered regularly what will be the observation after two weeks