Because the rock is laid down over time, the oldest rock (and fossils or whatever) will be in the lowest layer. As you go up, the age decreases - you are looking at younger rocks.
This doesn't tell you the *absolute* age of the rocks - you can't say from this evidence whether they are 100 million or 500 million years old. But you can see changes over history and you can get an ordering in time.
<span>In the question,'when a doctor is able to determine the sex of the foetus, during an ultrasound scan, what stage of development is the foetus in, the correction option is D, that is, the second trimester. Human pregnancy usually lasts for an average of nine months. The nine months are divided into three parts of three months each called trimester. The first trimester is made up of the first week of the pregnancy to the twelfth week. During this period, the foetus is just developing and can not be picked up easily by an ultrasound scan, but by the second trimester, which is week thirteen to week twenty four, the foetus would have develop enough to be picked up by the ultrasound scan. At this stage, the doctor can easily determine the sex of the foetus whether it is a boy or a girl.</span>
The nucleus of a dividing cell will be larger and contain twice as many chromosomes
Answer:
A.
Explanation:
The nervous system, circulatory system, integumentary system, will be involved.
Hope this helps, have a great day.
In response to a steak dinner, certain secretions are needed to aid digestion. What cells in the pancreas would provide these secretions - -----Acinar cells.
In response to a high fat and protein meal, CCK would be stimulated and in turn would stimulate an enzyme-rich secretion from the pancreas.
What are Acinar cells?
The pancreatic acinar cell is the functional unit of the exocrine pancreas. It synthesizes, stores, and secretes digestive enzymes. Under normal physiological conditions, digestive enzymes are activated only once they have reached the duodenum.
What is the function of acinar cells?
Pancreatic acinar cells synthesize and secrete almost all the digestive enzymes active in the lumen of the small intestine which are necessary for nutrient digestion. Both synthesis and secretion are highly regulated over both short and long time frames to insure an appropriate supply of digestive enzymes.
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