A particular segment formed during normal Drosophila development
A. will always form the same structures in adult flies.
B. can form different structures, depending on positional information received by the segment during early development.
C. is only important to early developmental stages.
D. will express different transcription factors in different individuals.
E. will become ectoderm, endoderm, or mesoderm.
A. will always form the same structures in adult flies.
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The term [(K-N)/K] influences a population growth curve such that
a) when K is small, mortality rates are lowest b) the increase in actual population numbers is greatest when N is small c) when N equals K, population growth is zero d) as N approaches K, the birthdate approaches zero e) as N approaches K, a populations carrying capacity increases
__________ behavior can occur without having been learned by experience. Fill in the blank(s) with the appropriate word(s)
Which of the following traits do archaeans and bacteria share?
A) composition of the cell wall B) composition of the cell wall and lack of a nuclear envelope C) lack of a nuclear envelope and presence of plasma membrane D) presence of plasma membrane and composition of the cell wall
The physical manifestation of an organism's genes is its
A) number of chromosomes. B) environment. C) genotype. D) phenotype. E) genetic code.