It is often said that development is a two-step process. Which two steps are likely to be referred to here?
What will be an ideal response?
determination and differentiation
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Deduce why viruses are excluded from the ribosomal RNA-based tree of life
A) Some viruses contain multiple strands of RNA. B) Their genetic elements cannot be sequenced. C) They can infect other organisms, which complicates the genetic comparisons. D) They lack ribosomal RNA.
Trichomoniasis is a
A. sexually transmitted disease. B. disease that can be treated with Flagyl. C. disease caused by a flagellate. D. All of the choices are correct.
What does the mass number represent?
a. Number of protons and electrons b. Number of protons c. Number of neurons and electrons d. Number of neutrons e. Number of protons and neutrons
The relatively rapid appearance of animal phyla in the Cambrian period is correlated with a rise in ________ at the same time
Fill in the blank(s) with correct word