You are given an embryo with eight cells and you carefully separate them and allow them to develop in separate containers. Each of the cells forms a complete embryo that develops normally into an adult animal. How would you categorize your animal?
A. It has spiral cleavage.
B. It is a protostome.
C. It has indeterminate cleavage.
D. It has determinate cleavage.
E. It is an annelid, mollusk, or arthropod.
Answer: C
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___________ suggests that traits in offspring resemble the average of the parents
A. Mendelian inheritance B. Natural selection C. Blending inheritance D. Eugenic inheritance
The major effect of excess water in the soil is
A. increase the level of oxygen. B. lower the amount of oxygen. C. reduce the pH. D. increase the amount of nitrogen.
Endocytosis and exocytosis are mechanisms of ______ transport
Fill in the blank(s) with the appropriate word(s).
The key differences between cell types that allows them to be differentiated from one another are ________, the result ofÂ
A. the rate of gene expression in different cell types; varying density of RNA polymerase to produce more mRNA in some cells than others. B. the amount of protein present in different cell types; varying density of ribosomes to produce more polypeptides in some cells than others. C. the proteins being produced in each cell type; transcription factors regulating which genes are expressed and their level of expression. D. the DNA present in the nucleus of each cell type; differential sorting of chromosomes during mitosis when the cells are dividing.