When is an unborn child called a fetus?
A) From the 9th week of pregnancy to birth
B) From cleavage to the 9th week of pregnancy
C) From conception through birth
D) From cleavage to birth
A
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Which of the following is not one of the four main functions of the stem of a plant?
1.containing meristematic tissue that gives rise to new cells of the shoot 2.housing the vascular tissues 3.mechanical support 4.photosynthesis
The double helix model of DNA suggested by Watson and Crick was exciting to the scientific community because:
a. it opened the door to new PCR based technologies. b. it explained how genetic material could be duplicated by means of the complementary strands. c. it suggested the role of DNA in protein synthesis. d. it proved once and for all that DNA was the messenger of heritable traits. e. All of the above are correct.
As air travels over a mountain range, it warms on the far side and absorbs water from the land, creating a local dry area called a ________
Fill in the blank(s) with correct word
Low sperm count may result in an insufficient amount of enzyme to clear a path through the ____to the egg plasma membrane.
Fill in the blank(s) with the appropriate word(s).