T cells, a part of our body's defense mechanism, are found in the ________ gland
Fill in the blank(s) with correct word
thymus
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The hypothesis that life evolved on another planet and was transported to Earth by meteorites cannot be disregarded
Why?
What will be an ideal response?The fossil record represents _____ of the total species that have ever lived
1.90% 2.less than 1% 3.75% 4.50% 5.5%
Coconut milk has been used to promote the differentiation of organs in masses of plant tissue growing in culture. Coconut milk is effective for this reason because it contains
A. cytokinins. B. abscisic acid. C. gibberellins. D. auxins. E. ethylene.
The thick filaments of skeletal muscle ____
a. are composed of proteins with a double head and tail b. are composed of actin c. are attached to Z lines d. make up the light bands of the muscle e. are bead-like proteins