Which class of genes controls the developmental identity of segments along the anterior-posterior axis?
What will be an ideal response?
homeotic genes
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One day after a biology class four of your friends argue about the difference between phylogeny and systematics. Which friend is right?
A. Friend A states that systematics and phylogenies are really the same, one is more recent than the other, but basically they are the same. B. Friend B says that systematics is the same as cladistics and cladistics is reconstructing clades, which ultimately lead to the development of phylogenies. C. Friend C argues that systematics is the actual collecting and cataloguing of specimens into museums that can be used later by scientists to construct clades and phylogenies. D. Friend D says that the way she remembers is that systematics is the reconstruction and study of phylogenies.
The reverse Christie, Atkins, Munch-Petersen (CAMP) test is positive for these curved gram-positive bacilli. Which <-hemolytic organism is used in conjunction with this organism in the reverse CAMP test?
a. Streptococcus pyogenes b. S. agalactiae c. S. saprophyticus d. S. aureus
Calcification zone
What will be an ideal response?
The Golgi body is responsible for ________ .
a. building new polypeptide chains b. building new lipids c. processing new lipids and polypeptide chains into their final form d. holding lysosomes and peroxidases e. holding digestive enzymes