Primary succession starts with bare rock which is broken down by either lichen or moss to make soil while secondary succession starts with developed soil
Answer:
B. A chemical reaction transforms thermal energy into chemical energy
Explanation:
I hope it helps <3
Crossing over at prophase I results in the linked genes (those on the same chromosome) becoming unlinked and separated. Prophase I is this first stage of meiosis, the chromosomes condense, form tetrads, and exchange DNA. The nucleolus and nuclear envelope disappear.
The controlled experiments are performed by the scientists, when they want to study the changes in the sample on changing a single variable. So, the correct answer is option (b).
In case, all variables are kept same, no changes would be observed in the experiment sample. A controlled experiment can be performed on living thing as well as non living. But, controlled experiment cannot be performed on the things which are influenced by a lot of variables, as they cannot create realistic results. So, the option (a), (c), and (d) are incorrect.
I believe that the answer to this question is, that laws can be made to prevent certain things/ amounts of things to be used up.
