Humans first appeared about ______ years ago.
A) 2000
B) 200,000
C) 2 million
D) 20 million
E) 200 million
Correct Answer:
Verified
Q26: The food manufactured by photosynthesis is transported
Q27: Water is transported upward through the plant
Q28: Secondary growth refers to growth:
A)that is of
Q29: Phytoremediation refers to the process by which
Q30: In all ecosystems, heterotrophs are completely dependent
Q32: A seed is composed of three parts:
A)root,
Q33: The projected human population of the Earth
Q34: What organisms are found at the base
Q35: The development of agriculture started at least
Q36: Cytology is the study of:
A)energy transformations.
B)plant form.
C)heredity.
D)fossil
Unlock this Answer For Free Now!
View this answer and more for free by performing one of the following actions
Scan the QR code to install the App and get 2 free unlocks
Unlock quizzes for free by uploading documents