What is the primary muscle used for normal breathing and which additional muscles are used to increase inspiration and expiration when performing strenuous exercise?

Fill in the blank. 1. DNA replication takes place during the 2. The enzyme RNA polymerase builds short RN DNA polymerase can build the complementa 3. Because DNA synthesis proceeds in the 5' to pieces called Okazaki fragments.

Does changing the sequence of nucleotides always result in a different amino acid sequence. why or why not

True or false? Single-stranded DNA molecules are said to be antiparallel when they are lined up next to each other but oriented in opposite directions.

Which of these human activities is most likely to cause an increase in the number of asthma sufferers? A. Increased consumption of beef, which increases methane production B. Use of solar panels instead of fossil fuels for energy production C.

the condition known as heartburn is most often caused by acid regurgitation from the stomach into the esophagus. Some of the drugs that treat heartburn work by decreasing the secretion of acid by the cells of the stomach.

In human beings, which factor determines the sex of an individual? A) paring with the X chromosome B) genes within the chromosomes C) presence of the Y chromosome D) number of chromosomes

Suppose you want to test the hypothesis that plants grow taller when they receive more sunlight identify an independent variable and a dependent variable for this investigation

A group of sheep run in random directions to confuse a single predator. This is an example of which social behavior? A) migrating B) herding C) schooling D) cooperative hunting

What type of normal human cell contains 22 autosomes and a y chromosome? what type of normal human cell contains 22 autosomes and a y chromosome? somatic cell of a male sperm cell somatic cell of a female egg cell?

Which of the following statements is true about nuclear fusion? A. It involves splitting of atomic nuclei. B. It creates "daughter" nuclei. C. It involves the combining of atomic nuclei. D. It produces more radioactive waste than nuclear fission.