Fiona wants to use the scientific method to answer the question “do oxygen levels in the air affect rates of photosynthesis? ” she reads about photosynthesis in her biology book and is ready to carry out the next step. what should she do next?
perform an experiment
design a procedure
make observations
form a hypothesis

the answer is d

Explanation:

because she needs to figure out whats going to happen

prophase: we can observe the chromosomes to coil up and condense. they become visible. nuclear membrane and envelope disintigrate.s

metaphase: chromosomes align at the center, the metaphase plate. spindle fibers attach to centromeres of the sister chromatids. they meet at kinetochores.

anaphase: sister chromatids are pulled towards each opposing centromere, set on different poles.

telophase: chromosomes are now clustered up only on either sides of the cell. nuclear membranes reform, and a new cell wall forms along the cell plate. this will lead to cytokinesis, the process that divides the cell membrane and forms the cell wall.

the answer is lactic acid from anaerobic respiration. the acid in lactic acid is what creates sore and burning muscles. if you think about how acid burns that will give you a clue for questions like this.