You are asked to determine if a tissue sample taken from a plant stem comes from a monocot or eudicot. How will you accomplish this?
A. Examine the epidermis and determine the depth of the cuticle layer.
B. Locate the vascular bundles and analyze their pattern.
C. Determine if the xylem and phloem are located in separate vascular bundles or are bundled together.
D. Look at the ground tissue to see if it is arranged in concentric rings or in parallel bundles.
E. Examine the vascular cambium and determine if it is divided into segments or is continuous throughout the stem.
Answer: B
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Hemoglobin transports oxygen in the blood and consists of a chain of 146 amino acids. How many different types of amino acids are used to construct proteins?
A. 2 B. 20 C. 146 D. 200
Ecological footprints calculate
a. the amount of water and fossil fuel needed to support producers and consumers b. the damage left on an environment from using natural resources unwisely by a population c. the amount of land and water a population requires to produce the resources it consumes and assimilate the waste it produces d. the amount of land needed to support a population and absorb their waste e. the amount of carbon that consumers require and produce as waste
What does the nucleolus, within the nucleus, synthesize?
a. DNA b. genes c. hormones d. ribosomal RNA e. messenger RNA
The first vertebrates to develop jaws were the:
A) mammals. B) reptiles. C) amphibians. D) fish.