They lack chloroplasts, but have thylakoid membranes, and are thought to have been among the first organisms on earth.

after receiving a stimus, the sensory receptors send(s) signals to the appropriate area of the body.  

the must be sensory neurons.  

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ucd e e. rr. t t t t t t. to

the answers are as following:

1. c. double helix, nucleosome, coil, supercoil, chromosome

2. b. g2 phase, preparation for mitosis

3. d. interphase consists of the g1, s, and g2 phases

4. c. metaphase

5. a. chromosomes are duplicated before cell division so that each new daughter cell has a complete set

you should wear a lead protective shield when having teeth x-rays

hope i

-lavira : )