You might infer from packages of commercial fertilizer that which of the following nutrients are most limiting to plant growth?
a. Carbon, nitrogen and phosphorous.
b. Nitrogen, phosphorous and potassium.
c. Hydrogen, phosphorus and magnesium.
d. Iron, Magnesium and nitrogen.
e. Phosphorus, potassium, and calcium.
B
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Which of the following was a challenge to the survival of the first land plants?
A) too much sunlight B) a shortage of carbon dioxide C) desiccation D) animal predation
A cluster analysis is used when reading a DNA microarray to identify genes whose expression follow a similar patterns
Indicate whether the statement is true or false
Which group is most closely related to fungi?
a. radiolarians b. stramenopiles c. alveolates d. amoebozoans e. oomycotes
Pigment can be found in several layers of the epidermis. In which layers would you expect to find the cells that produce melanin?
a. stratum granulosum b. stratum lucidum c. stratum basale d. stratum spinosum