Since contraction of the hamstrings causes the knee to bend and contraction of the quadriceps causes the knee to extend, these muscles are said to be ________
Fill in the blank(s) with correct word
antagonistic
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Cosmids are so named because they can be used to express foreign genes in a variety of different hosts.
Answer the following statement true (T) or false (F)
In the roundworm Caenorhabditis elegans, development of the vulva begins when the ____ secretes ____, which then bind(s) to _____ on the _____
A. progenitor cell; EGF; the EGF receptor; anchor cell B. progenitor cell; transcription factors; cisregulatory regions; anchor cell C. anchor cell; EGF; the EGF receptor; progenitor cell D. anchor cell; transcription factors; cisregulatory regions; progenitor cell E. Type 1 cell; EGF; the EGF receptor; Type 2 cell
What is the significance of the presence of genes related to bacteria and archaea in the eukaryotic genome? (Select all correct choices.)
A. The ancestor of the modern eukaryotic cell was a primitive eukaryote. B. An archaeon engulfed a bacterium to form a eukaryotic cell. C. It shows evidence of horizontal gene transfer. D. It is a byproduct of meiosis.
Fats that stay liquid at room temperature are ____
a. animal fats b. unsaturated c. transfatty acids d. phospholipids e. cholesterol