A developing organism's failure to produce muscle tissue is most likely due to
A) underdevelopment of the ectoderm.
B) underdevelopment of the endoderm.
C) fibroblast growth factor receptor mutations.
D) adenylate cyclase mutations.
E) missing chromosomes.
C) fibroblast growth factor receptor mutations.
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Based on the phylogenetic tree shown, to which of the following groups listed below is a bird most closely related?
A. turtle and snake B. human C. snake only D. frog E. turtle only
Without telomeres, linear eukaryotic chromosomes would get shorter and shorter with each round of DNA replication
Answer the following statement(s) true (T) or false (F)
One of the main functions of the hypothalamus is to produce ____ hormones, which affect the ____
pituitary.
a. releasing; posterior b. releasing; anterior c. activating; posterior d. amplification; anterior e. suppressing; anterior
The structure labeled 2 in Figure 28-1 is the:
a. stigma.
b. style.
c. receptacle.
d. ovary.
e. filament.