1. In your own words,describe what DNA extraction is and why it's the first step in a molecular biology experiment.

Which are not functions of the skeletal system? (check all that apply) fat storage (triglycerides) maintain blood pressure consciousness leverage protection mineral homeostasis support platelet production blood cell production initiate movement

The somatic nervous system provides sensory and motor innervation for: secretory glands. peripheral nerves. smooth muscle. abdominal viscera.

Scientists now believe the Miller-Urey experiment was not an accurate depiction of the conditions on early Earth. What reasonable inference could be made about this experiment? It demonstrated that a hypothesis other than Miller-Urey is correct. It showed that reactions for the origins of life could have occurred in a similar way. Because it produced 13 amino acids out of 20, it signaled the hypothesis is most likely correct. Because only 13 amino acids were produced, it suggested that not all of today's elements were present in early Earth conditions.

Which factor would stimulate the respiratory center? Select all that apply. One, some, or all responses may be correct. Changes in pH Increased O_(2) levels Changes in position Decreased O_(2) levels Increased carbon dioxide (CO_(2)) levels Air leaving the lungs

5. Match the five main structures of the hair root with their description. __ 1. Hair follicle __ 2. Hair bulb __ 3. Dermal papilla __ __ 5. Sebaceous glands a) Small, cone-shaped elevation located at the base of the hair follicle that fits into the hair bulb b) The tube-like depression or pocket in the skin or scalp that contains the hair root c) Small, involuntary muscle in the base of the hair follicle 4. Arrector pili muscle d)The oil glands in the skin that are connected to the hair follicles e) The thickened, club -shaped structure that forms the lower part of the root

What structure(s)primarily stabilize the shoulder joint? Bony projections including the olecranon process. Strong ligaments including the collateral ligaments. Muscles including the rotator cuff.

What are classified as either water-soluble or fat.-soluble? Minerals Vitamins Carbohydrates Protein

If a scientist were studying the role of different proteins in the regulation of insulin secretion I from a pancreatic cell, they would be studying ) cell biology. genomics. both genomics and proteomics. proteomics. ) both proteomics and cell biology.

Which is the smallest of all levels of organization? organism ) cell population atom organ

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Which one of the following groups is composed of prokaryotic cells? View Available Hint(s) animals protists bacteria fungi

Which of the following is NOT a loose connective tissue? elastic cartilage areolar reticular adipose

X What structure combines together to create DNA? Sugar molecules Hydrogen bonds Nucleotides C Amino acids

A species with an initial population of 120 is growing in an environment where the carrying capacity is 750. After 3 years the population is up to 450 Use a logistic function to estimate the population after 5 years . Round to the nearest whole number. $Population=[?]$ individuals.

Multiple Choice Question Secretory IgA is NOT found in which of the following fluids? Tears Mucus Colostrum Stomach acid Saliva

Which statements are true about bacteria? (Select all that apply) They were one of the first life forms on Earth Their total biomass is greater than that of all plants and animals combined Some are multicellular They only live in human bodies.

Match each example on the left to the type of reproductive barrier on the right. A desert keeps frogs on either side from mating with one another. Female spring peeper frogs only mate with males that make a a. behavioral barrier b. physical barrier c. geographic barrier

Which of the following macronutrients is the preferred fuel for the brain and red blood cells? A proteins B lipids C water D carbohydrates E proteins and lipids

The technique developed by Hans Christian Gram is important for bacterial classification. etiology. identification. epidemiology. isolation.

Elements/metals found in food that regulate body functions Water Minerals Vitamins Carbohydrates