Which of the following is not a characteristic of all living things? .
a) ability to maintain a stable internal environment
b) ability to reproduce
c) ability to take in air
d) ability to grow and develop

Fossils of ancestors of the modern horses show a small 4-toed almost dog-like browsing animal named eohippus over time the horses got larger lost toes and changed to a grazing diet what is the best explanation of why this change occurred

Light sensitivity in euglena is provided by the

Many birth-control pills release a constant amount of synthetic estradiols and progesterone for 21 days. true or false