Emery believes mucus is unhealthy, so he is always spitting it out. Explain to Emery why mucus produced by the GI tract is beneficial
What will be an ideal response?
The lining of the GI tract called the mucosa produces mucus. Mucus helps to protect the lining of the GI tract from rough substances in food and from digestive enzymes. Mucus also lubricates the lumen, allowing food to slide through easily.
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A liger is a result from a male lion and a female tiger. Male ligers cannot produce offspring This is an example of
A. a prezygotic mechanism. B. hybrid inviability. C. hybrid sterility. D. hybrid breakdown. E. a prezygotic mechanism and hybrid sterility are correct.
This image shows an area in which a glacier has melted. What is indicated by the number “2”?
a. competition for food resources b. resource partitioning between two competing species c. emergence of climax species d. colonization by pioneer species e. secondary succession
Thermal ________ is the ability of an organism to transmit heat
Fill in the blank(s) with correct word
Inside the inner membranes of chloroplasts, chlorophyll pigments are grouped into a light-gathering network called a ________.
Fill in the blank(s) with the appropriate word(s).