The Hox genes came to regulate each of the following in what sequence, from earliest to most recent?

1. identity and position of paired appendages in protostome embryos

2. formation of water channels in sponges

3. anterior-posterior orientation of segments in protostome embryos

4. positioning of tentacles in cnidarians

5. anterior-posterior orientation in vertebrate embryos

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#Question id: 2279

#Section 3: Genetics, Cellular and Molecular Biology

Mitochondrial enzymes for oxidative metabolism are

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#Question id: 1958

#Section 2: General Biology

Both the eye and the respiratory tract are protected against infections by which of the following?

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#Question id: 2925

#Section 3: Genetics, Cellular and Molecular Biology

Mitotic cyclin levels in early Xenopus embryos are regulated by:

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#Question id: 1561

#Section 2: General Biology

The cells and signaling molecules involved in the initial stages of the inflammatory response are ?

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#Question id: 3336

#Section 3: Genetics, Cellular and Molecular Biology

There are 4 alleles at a given locus in a diploid population and all alleles are equal abundant. What is the proportion of all homozygotes in the population?