The male gametophyte in flowering plants forms in a
a. corolla.
b. receptacle.
c. stamen.
d. calyx.
e. carpel.
C
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Explain why it is unlikely an iron-oxidizing bacterium would thrive in a cold stream with a neutral pH. Also propose an experiment that would test whether iron-oxidizing bacteria are present in the stream
What will be an ideal response?
When using a light microscope to view a cell you obtained from scraping under your fingernails, you notice that the cell lacks a nucleus; therefore, you conclude that the cell must be a type of __________ cell.
A) plant B) eukaryotic C) fungal D) prokaryotic
The Humboldt Current runs along the coast of South America, carrying nitrogen-rich cold water northward.
Answer the following statement true (T) or false (F)
In early cell evolution, why would natural selection favor division into equal-sized daughter cells?
a. Splitting into two equal parts is the most energetically efficient method. b. Two daughter cells is the most efficient way to reproduce sexually. c. Splitting into two daughter cells is more efficient for horizontal gene transfer. d. Hypercycles can be maintained by splitting into two.