The fetus is extremely vulnerable to environmental factors that can cause birth defects during the

What will be an ideal response?


First Trimester

Biology & Microbiology

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Which process allows a vertebrate to generate millions of different lymphocytes?  

A.  DNA rearrangement B.  DNA reestablishment C.  clonal variability D.  instructional variation E.  gene cloning

Biology & Microbiology

Natural or man-made substances released into soil, air, or water in greater than natural amounts are called:

a. acids b. pollutants c. nutrients d. metals e. chemicals

Biology & Microbiology

The structure that increases the surface area of the small intestine are the villi and the _______

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

After meiosis, what process restores the chromosome number in diploid individuals?

A. Spermatogenesis B. Transcription C. Fertilization D. Oogenesis E. Gametogenesis

Biology & Microbiology