During nervous-system development in Drosophila, the membrane-bound protein Delta acts as an inhibitory signal to prevent neighboring cells from developing into neuronal cells. Delta is involved in ______________ signaling
(a) endocrine
(b) paracrine
(c) neuronal
(d) contact-dependent
(d)
You might also like to view...
Which respiratory disease is caused by a bacterial infection?
A. the common cold B. asthma C. lung cancer D. tuberculosis E. cystic fibrosis
Green Bacteria Phototrophy
What will be an ideal response?
Which of the following is true concerning postnatal development?
a. Infancy is defined as the first two years of life after birth. b. Senescence results in increased hormone secretion. c. Postnatal development occurs before birth. d. In general, boys experience their pre-adolescent growth spurt later than girls. e. Early childhood is a time of rapid cell division in nerve cells.
The Human Genome Project accomplishes all of the following except:
a. sequencing the entire human genome. b. identifying all of the genes in the human genome. c. the foundation for studying gene function in humans. d. basis for studying variations in gene sequences related to illness. e. imprinting a gene with the phenotype of the parent