200,000,000 years ago
Biology, 10.11.2020 17:20 loganharper992
When did the first mammals and birds appear?
500,000,000 years ago
200,000,000 years ago
100,000,000 years ago
50,000,000 years ago
Answers: 2
Biology, 21.06.2019 14:30, mmpinkortizov5n3y
When should a bar graph be used? a. when there is no independent variable. b. when the independent variable is continuous and does not show a relationship to the dependent variable. c. when the independent variable is continuous and shows a causal link to the dependent variable. d. when the independent variable is composed of categories and does not show a relationship.
Answers: 2
Biology, 22.06.2019 03:30, linag969p9xeno
Which is the correct order in the scientific process? ask a question ® form a hypothesis ® make an observation ask a question ® make an observation ® form a hypothesis make an observation ® form a hypothesis ® ask a question make an observation ® ask a question ® form a hypothesis
Answers: 1
Biology, 22.06.2019 07:20, boo8181
Agroup of plant cells was exposed to radiation, which damaged the chloroplasts and caused them to lose function. if the mitochondria were unharmed, what would happen to the overall function of the plant cells? a. the cells would not be able to make food, but would be able to release energy from biomolecules. b. the cells would not be able to replicate dna, but would be able to break down waste. c. the cells would not be able to break down waste, but would be able to replicate dna. d. the cells would not be able to release energy from biomolecules, but would be able to make food.
Answers: 1
When did the first mammals and birds appear?
500,000,000 years ago
200,000,000 years ago
200,000,000 years ago
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