People who suffer from a heart attack often have an increased ratio of lactic acid to pyruvic acid in their hearts. What does this observation say about the availability of oxygen in the heart muscle cells of someone who has had a heart attack? How could you use this information to screen people who might be at risk for a heart attack?

Heart attack occurs due to anaerobic respiration.

Explanation:

This observation say about the availability of oxygen in the heart muscle cells of a person who has had a heart attack because due to unavailability of oxygen to the heart cells, anaerobic respiration occurs that produce lactic acid. If the oxygen is available to the heart cells, they produce pyruvate acid and no heart attack will occur to the person so people should anaerobic respiration in order to avoid heart attack.

both male and female gametes are produced by meiosis of the germ cells. therefore, both male and female gametes are haploid. one male and one female gamete unite during the fertilization to form the diploid zygote. in seed bearing plants, pollen grain is the male gametophyte, which produces sperm cells.

the dna molecules have a negative charge because of the phosphate groups in their sugar-phosphate backbone, so they start moving through the matrix of the gel towards the positive pole. power is turned on and dna fragments migrate through gel (towards the positive electrode).

explanation: