The most vulnerable organisms to the effects of DDT

are
a. producers.
b. herbivores.
c. primary carnivores.
d. decomposers.
e. top carnivores.


Answer: e

Biology & Microbiology

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Cells capable of producing all the various types of cells of the adult are called ____ cells

a. semipotent

b. pluripotent c. totipotent d. multipotent e. differentiated

Biology & Microbiology

During the cardiac cycle, when a heart chamber is relaxed, it is in ____________________ and when it is contracting, it is in ____________________

Fill in the blank(s) with correct word

Biology & Microbiology

To answer questions 72–75 refer to the five items listed below:a

restriction enzymes b. recombinants c. plasmids d. clones e. restriction sites M 72. These are bacterial populations containing thousands or millions of identical copies of one to several genes. D 73. The use of the techniques of genetic engineering to move a novel or foreign piece of DNA into the DNA of an organism produces DNA __________. M 74. The pieces of DNA that are moved by a genetic engineer from one organism to another are first incorporated into these. E 75. The function of these is to cut apart foreign DNA molecules.

Biology & Microbiology

In flowering plants, the unfertilized ovule contains the

A) embryo. B) endosperm. C) female gametophyte. D) stigma. E) pollen grain.

Biology & Microbiology