Biology, 28.10.2019 23:31 Akkenson17871
Which of the following is an example of a positive feedback? a.a low level of oxygen in the blood triggers production of red blood cells, which transport oxygen.b. an increase in blood sugar level stimulates the pancreas to secrete insulin, which lowers blood sugar level.c.a tear in the lining of a blood vessel triggers the accumulation of blood platelets, which cause blood to clot.
Answers: 3
Biology, 22.06.2019 00:00
Hurry which of these is true about index fossils? a) are very scarcely found b) used as guides in relative dating c) found in the youngest layer of the rock d) used as reference points in absolute dating
Answers: 2
Biology, 22.06.2019 02:30
What were the main components of earth’s earliest atmosphere? oxygen and ammonia hydrogen and helium oxygen and nitrogen hydrogen and nitrogen
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Biology, 22.06.2019 22:10
Which of the following correctly describes the appearance of muscle tissue found in the heart? (2 points) single-nucleus, non-striated, short cells single-nucleus, striated, branching cells multinucleated, non-striated, branching cells multinucleated, striated, long threadlike cells
Answers: 1
Biology, 22.06.2019 23:00
When a doctor suspects that a patient may have diabetes, she will often have the patient take a glucose challenge test. after the patient drinks a large amount of sugary solution, his blood is drawn and the circulating levels of glucose in the blood are determined. which of the following curves do you expect from a patient with diabetes? a. curve ab. curve bc. curve cd. normal curvee. none of the above
Answers: 3
Which of the following is an example of a positive feedback? a.a low level of oxygen in the blood t...
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