Answer:
number 1: heat from the sun or solar energy
Answer:
A structure in the cell nucleus that contains DNA, histone protein, and other structural proteins.
Explanation:
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Answer:
naturalistic observation
Explanation:
The best possible way to study how tigers interact with each other in their habitats would be to use a naturalistic observation. This type of observation focuses on observing the main subject of the study in it's natural environment without interfering in any sort of way. This allows the scientists to observe exactly how the tigers interact when there are no humans around.
