In muscle fibers, ___________ motors move along actin filaments.
a) kinesin
b) dyein
c) combustion
d) myosin
Ans: d) myosin
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Most cnidarians are known to produce toxins. In fact, it has been claimed that one particular species produces the most deadly of all toxins on the planet. What feature of this group most likely evolved simultaneously with the evolution of these toxins?
A) the medusa body form B) asexual reproduction C) a slow-moving or sessile lifestyle in the adult D) diploblastic design E) bilateral symmetry in the mobile larval forms
Sometimes a fertilized egg, after a few of rounds of division, separates into two embryos which results in identical, or ____ , twins
Fill in the blank with the appropriate word.
Draw a duplicated chromosome. Now, label each part of the chromosome with both its function and its
identity. What will be an ideal response?
The element carbon has 6 protons and 6 neutrons in its nucleus. Which of the following represents the carbon-14 isotope?
a. 6 protons, 8 neutrons b. 6 protons, 7 neutrons c. 7 protons, 6 neutrons d. 8 protons, 6 neutrons