Which of the following would not be secreted across the tubule?
a. ammonium ions
b. hydrogen ions
c. creatinine
d. carbon dioxide
e. penicillin
D
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How do guard cells differ from other epidermal
cells?
a. guard cells do not have a waxy cuticle b. guard cells are more than one cell thick c. guard cells are photosynthetic d. guard cells are only found on the upper epidermal surface of a leaf e. all of these are differences between guard cells and other epidermal cells
The specific traits of a particular organism enabling it to survive, grow, and reproduce within a given environment are called
A) mutations. B) genes. C) adaptations. D) phenotypes.
At a natural history museum, you see a skeleton with the following characteristics: four long, slender finger bones and a smaller opposable thumb bone, and larger feet with long toes
In what type of environment would you expect this organism to have lived? A) one that lacks vegetation B) one that is very cold C) one that is very dry D) one that is heavily forested
Endosperm has allowed the angiosperms to become the most numerous and diverse plant group. What is the role of the endosperm?
A) It provides nutrition for the developing embryo, therefore increasing survival rates. B) It is the hard outer seed coat that protects the embryo. C) It ejects and disperses seeds after they mature. D) It is the ripened ovary tissue involved in seed dispersal and protection. E) It is a type of male gamete.