Answer: b) controlling the amount of air entering the combustion tube
The rate of a reaction when using a Bunsen burner is changed by modifying the temperature of the flame.
In this type of burner, the temperature of the flame is modified by controlling the amount of air available for the flame. More air allowed will result in a hotter flame. This is achieved by turning the collar around the air holes.
Answer:
The correct answer is C
Explanation:
According to the research results, approximately 80 percent of the variations in human heigth is due to the geneteic differences that are inherited. Other factors that impact height are environment, upbringing and the diet of the person. I hope this answer helps.
Answer:
vitamin A is essential because consuming too much supplemental vitamin A during pregnancy can cause birth defects.
Hope this helps!
The types of rock that can form sediment when they are weathered is D. Igneous, sedimentary and metamorphic. (When the molten rock cools it forms an igneous rock. Metamorphic rocks can form from either sedimentary or igneous rocks. The sedimentary particles from which a sedimentary rock is formed can be derived from a metamorphic, an igneous, or another sedimentary rock. All three rock types can be melted to form a magma.)
Answer:
They perform checkpoints and regulate/control the cell cycle.
Explanation:
Cyclin/CDK complexes are known to regulate both mitotic and meiotic cell cycles. Some processes are shared by both forms of cell division, however the process known as meiosis differs in terms of its features and needs. Following two rounds of cell division in succession, meiosis is characterized by the replication of DNA.
