<span>Cross bridges are created when myosin heads bind to ATP. This phenomenon is basically muscle contraction at work. In order for myosin heads to be bound with ATP at the actin active site, it must be excited with Calcium.
Once myosin heads bind with ATP, it begins to slide and perform muscle contractions in the body, allowing a person to move.</span>
Plants and other things that make food for themselves and use the sun to make food
I believe the answer would be B.
Answer:
Changes in gene expression
Explanation:
This phenomenon is the result of changes in gene expression. That means, how the information in the DNA is used by the cell. The genes that are active in the cells of the brain will be very different from the genes that are active in the cells of the bone marrow.
These patterns of gene expression are different for each cell, and dictate the identity of that cell. Gene expression patterns are controlled by a variety of factors in the cell that allow tissue-specific expression, such a transcription factors.
This can also be facilitated by another layer of regulation called epigenetics, which literally means "on top of" genetics, and refers to modifications of DNA (and the proteins around it), that can reflect and influence the activity of the genes within.
Answer:
More sunlight, more photosynthesis
Explanation:
This is because when the sunlight hits the leaves, it allows photosynthesis to occur. But when you have extended periods of sunlight, like summer, it causes photosynthesis to continue for a longer time, which causes rapid energy storage. This makes excess food for the plant which gives the plant more energy for growth and pollination.
Hope this clears it up for ya:)
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