Answer:
B. endoplasmic reticulum
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b. migration
c. seasonal color changes
d. insulating fur and feathers
The snowshoe hares undergo seasonal color changes, white for wintersnow and brown for spring/summer and rabbit’s unique adaptations help it to survive predation in the taiga.
Adaptation has been defined as the change that has been taken place in the habit or body structure of an organism according to situation to get fit for survival in changing environment. Adaptation has very important factor for the survival of the organisms and there are several types of adaptation such as behavioral, physiological, and structural adaptation.
Charles Darwin has been proposed the theory of the adaptation which states that "an organism that is able to adapt to changing environment will survive, the rest will be eliminated. Adaptation has been defined as the change that has been taken place in the habit or body structure of an organism according to situation to get fit for survival in changing environment.
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Answer:
D
Explanation:
How worn out and weatherd the rocks are inside and outside the rock!
So far scientists have not found a way to determine the exact age of the Earth directly from Earth rocks because Earth's oldest rocks have been recycled and destroyed by the process of plate tectonics. If there are any of Earth's primordial rocks left in their original state, they have not yet been found. Nevertheless, scientists have been able to determine the probable age of the Solar System and to calculate an age for the Earth by assuming that the Earth and the rest of the solid bodies in the Solar System formed at the same time and are, therefore, of the same age. The ages of Earth and Moon rocks and of meteorites are measured by the decay of long-lived radioactive isotopes of elements that occur naturally in rocks and minerals and that decay with half lives of 700 million to more than 100 billion years to stable isotopes of other elements. These dating techniques, which are firmly grounded in physics and are known collectively as radiometric dating, are used to measure the last time that the rock being dated was either melted or disturbed sufficiently to re homogenize its radioactive elements.
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B. A double-blind technique
C. A short observation period
D. A voluntary enrollment plan
A scientist's primary concern in a clinical trial is the patient's safety, there fore short observation decreases the reliability of results from a clinical trial
Answer:
C. A short observation period
Explanation:
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