What can the mouthparts of an animal tell you about its diet?
A) Mouthparts of animals are specialized to obtain desired food items efficiently.
B) Mouthparts provide clues about the type of digestion that goes on in the stomach.
C) Mouthparts provide clues about the rate of nutrient absorption.
D) Mouthparts of all animals are designed to reduce the size of the food particles ingested.
Answer: A
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Nucleotides are to nucleic acids as amino acids are to ________.
Fill in the blank(s) with the appropriate word(s).
Which statement is NOT correct about the roundworms?
A. Roundworms have a tube-within-a-tube body plan. B. There are three layers of tissues in the body. C. Roundworms have a smooth unsegmented outside body wall. D. Roundworms are all parasitic. E. There is an internal body cavity called a pseudocoelom.
In humans, if nondisjunction led to an individual with a genotype of XXY, that person would
A. display both male and female characteristics. B. be male because each cell has one Y chromosome. C. be female because each cell has two X chromosomes. D. not survive.
A researcher is looking at a cellular sample using an electron microscope. They observe that while mRNA is being transcribed from the DNA that ribosomes are binding to the mRNA to make proteins. Is this sample from a bacterial or a eukaryotic cell?
What will be an ideal response?