Formaldehyde and asbestos can alter DNA base sequences in human cells. Based on this research, the use of chemicals has been greatly reduced because they A Group of answer choices

B may act as fertilizers and increase the growth of algae in ponds.

C have been replaced by more toxic compounds.

D are capable of causing mutations in humans.
interfere with the production of similar chemical compounds in animals.

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after making a punnet square using bv bv bv bv you will find that the ratio will be 9: 7 or a 128.6% probability.

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a compound light microscope is used to magnify objects in steps.  

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the answer is: the „power stroke“ step.

muscle contraction can be divided into a few steps:

1. the release of ach (acetylcholine) in the synaptic cleft, binding of ach for its receptor and consequently opening of the ca channels.

2. the release of ca, binding of ca for the troponin

3. troponin shifting the tropomyosin, which was blocking the active site on the actin

4. myosin heads attaching to actin by breaking down atp to adp+ pi

5.   formation of the ‘cross-bridge’ on the active site of the actin filament by myosin head

6. “power stroke” -the cross bridge pulls actin, which slides over the myosin

9.     7. the release of adp completes the cross-bridge movement and atp attaches to myosin, breaking the actin-myosin cross bridge.