B-valine,histidine,threonine,phenylalanine
Direct observation is an observation you make first hand. It is something you see with your own eyes and observe yourself.
Hope this helps!
If the membrane of a cell were no longer selectively permeable then "<span>The cell would die as it would not be able to regulate which substances could enter and leave", since a selectively permeable membrane allows both things to enter and leave for the cell's survival. </span>
I'm pretty sure its a because we already know that the dependent variable is "100 are given psychological test to assess their level of depression" and the experimental group is the one that took the 8 weeks of therapy and the control group is the group that we're on the waiting list for 8 weeks therefore the answer is A.independent variable
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Answer:
Explanation:Raymond Dasmann was the first person who used the term Biological diversity in 1968. He was a wildlife scientist and conservationist. But this term gain attraction in the scientific community in the 1980s.
So during 1980s the scientific community and activists were concerned about the extinction of biodiversity so this topic gain attraction as a research subject among the scientific community.
The issue of biodiversity was first published in 1987 in journal Conservation Biology which soon popularized the concept of biodiversity and became the main journal for publication of scientific research on biodiversity.
Therefore through publication, the term biodiversity appeared which gain attraction in the scientific community, society and in politics.
