What is the biological risk of using salt on icy roads in parts of the country that have a cold winter season?
a. Plant root cells will grow in excess to try to reach fresh water.
b. Plant cells will take on excess water from the melted ice and become turgid.
c. Salt is in limited supply in the ecosystem and this type of overuse will make it even more so.
d. The salt has the risk of leeching into the ground and creating a hypertonic environment for plant cells.
Ans: d. The salt has the risk of leeching into the ground and creating a hypertonic environment for plant cells
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Which of the following statements about mammalian skin is incorrect?
A. The epidermis is an outer layer that provides a water-resistant, protective barrier. B. The dermis is the layer below the epidermis, containing connective tissue, blood vessels and nerve endings, that provides nutrients to the epidermis and a cushion layer for the body. C. Epithelial cells in the epidermis are primarily composed of keratinocytes that protect underlying tissue, and melanocytes that produce pigments. D. A specialized form of extracellular matrix, called the basal lamina, underlies the dermis and separates it from tissues below. E. Fibroblasts in the dermis produce extracellular matrix proteins to make the dermis strong and flexible.
Only ________ available in a particular trophic level is passed to the next trophic level
a. 10% of the energy b. kinetic energy c. 30% of the energy d. potential energy
The correlation coefficient for totally unrelated people is ____________________. Fill in the blank(s) with the appropriate word(s)
Which of the following statements regarding fungi is FALSE?
A) Most fungi are pathogenic for humans. B) Fungi are eukaryotic heterotrophs. C) Fungi reproduce by forming asexual or sexual spores. D) Most fungi grow well in acidic culture condition. E) Fungi tolerate low moisture conditions.