Biology

A weakness in Darwin's original theory of evolution was that the genetic basis for variation was not explained overproduction never occurs in nature competition occurs in animals but not in plants natural selection does not occur in domestic animals

Which perceptual system allows Nancy to run without watching her feet and hit a baseball without focusing on her hands? gustation proprioception somatosensation thermoception

4) Nervous tissue can transmit signals throughout the body. Muscle tissue 5 points can contract or relax in response to these signals. Which of these functions most likely occurs as the result of interactions between nervous tissue and muscle tissues? Filtering the blood in order to remove wastes producing substances that reduce body temperature moving the body in response to an environmental stimulus absorbing nutrients and transporting them to cells throughout the body B This is a required question these statements is true about human skin? Skin is made up of different structures that are composed of the same cell types Skin contains multiple types of specialized cells that carry out different functions The outer layer of skin is made up of cells, and the inner layer of skin is made up of tissues Sweat and oil glands are specialized organs that interact with other organs in the skin B This is a required question 3) The diagram below shows a cross section of human skin. Which of 5 points

9) Baits provide the quickest way to control an ant infestation. 1. True 2. False

Which medium cannot be sterilized in the autoclave? Mannitol salt agar (MSA) Lysine decarboxylase Simmons citrate Urea

The walls of the GI tract are composed of __ layers of tissue. two three five four

Organic molecules such as NADH can help enzymes and are referred to as __ cofactors prosthetic groups coenzymes vitamins

3 An injection of thyroxine to an otherwise normal rat will cause which of the following? development of a goiter hyperthyroidism high levels of TSH secretion high levels of TRH secretion Select View Experiment Results if you need to review your results from the Experiment to answer a question. After completing the Post-lab Quiz, you can view your results in the Lab Report.

Which of the following descriptions of the DNA double helix is accurate? one double stranded helix per linear chromosome more than one double stranded helix per linear chromosome negative supercoiling regulates gene expression the F plasmid is transferred as a single stranded molecule each chromosome is composed of four nucleotides

What is a telomere? the end of a linear chromosome a structure that keeps the ends of a linear chromosome from fusing with one another sequences that contain short tandem repeats located at the end of a linear chromosome a structure that protects the ends of linear chromosomes from degradation all of these are correct