In certain ecosystem, the number of cheetahs is lower as compared to their prey, gazelles. if the cheetahs disappeared from this ecosystem, then the number of gazelles will increase. this will disrupt the ecosystem of the forest because the gazelles will compete for limited food resources and possibly exhaust them. in this scenario, what type of species are cheetahs?

a. pioneer
b. seral
c. climax
d. keystone

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

Ineed to know why d is the correct answer asap

Toorale man murder mystery < - your lab link 1. how was the toorale man found? 2. what did archaeologists learn about the burial? why is the burial important? 3. what information were the scientists able to learn from the skeleton itself? 4. why is the question of whether the injuries came from a stone or steel weapon important? how could scientists distinguish between the different types of weapons? 5. what did the carbon dating and soil testing tell scientists about toorale man? why are the dates interesting for scientists?