Developmental Biology

Which is the correct sequence for levels of biological organization within an organism?  a.  Atom - molecule - organelle - cell - tissue b.  Molecule - atom - organelle - tissue - cell c.  Cell - organelle - atom - tissue - molecule d.  Organelle - molecule - atom - tissue - cell e.  Atom - organelle - molecule - cell - tissue

Immature cells that retain the potential to develop into multiple cell types are:  a. Germ cells b. Somatic cells c. Stem cells d. Nerve cells e. All are correct

A structure consisting of tissues organized to carry out a specific function defines a(an): a.  Organb.  Cellc.  Populationd.  Atome.  Molecule

Which of the following statements about pattern formation are true? Select the four statements that are true.a. Homeotic genes code for transcription factors that control the development of segment-specific body parts.b. Homeotic genes establish major body axes.c. Cells receive molecular signals that communicate their position in relation to other cells.d. Differential gene expression affects the developmental process in animals.e. Pattern formation begins in adult animals.f. The process of pattern formation involves segmentation of the body but does not involve the development of segment-specific body parts.g. Positional information controls pattern formation.

The genes that control the formation of specific structures (appendages) in the appropriate body regions of a Drosophila are known asa. inducersb. morphogensc. filopodiad. Hox Genese. cytoplasmic determinants

A sexual life cycle has two main events: meiosis and gamete formation.a. True   b. False