Hematocrit is the percentage of red blood cells in the blood. in adult humans, hematocrit is roughly 40-45%, but it can be much higher or lower in other animals. consider the weddell seal, a mammal that can dive and hold its breath underwater for upwards of 80 minutes. what is the hematocrit level of a weddell seal, and why

Which of the following descriptions of proteins are true? i. proteins can have different sequences of amino acids. ii. proteins can have different shapes. iii. proteins can have different numbers of amino acids. a. only i and ii are true. b. only ii and iii are true. c. only i and iii are true. d. i and ii and iii are all true. e. none are true statements

2. which is the last step in the scientific method?

Tropical rain forests support more species per unit area than any other terrestrial ecosystem. what is one way rain forests are important to the health of the biosphere?