The outer cells of a blastocyst become the, an organ that offers protection and nourishment. Once the blastocyst has implanted in the uterus, it is called an. After eight more weeks of development, it is called a.

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Ronald grows oranges on his farm. He finds that most of the fruit falls off the trees before becoming mature. What should he spray on the trees to stop the fruit from falling off too early?

To which skeletal system does the sternum belong? spongy skeleton compact skeleton axial skeleton appendicular skeleton

In which example is friction the most difficult to overcome? A. static friction between a desk and the floor B. rolling friction between a desk on wheels and the floor C. sliding friction between a desk and the floor once it is moving D.

Which of the following statements about the use of hydrokinetic energy is not True? A. hydrokinetic energy is a commonly used form of energy. B. Hydrokinetic energy requires the movement of waves. C.

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What is the function of a gene?

Explain the anthropogenic (man-made) impact on the Carbon Cycle.

Species are subdivided into smaller groups called subspecies. For people, the human species is subdivided into smaller groups called a. ethnic groups b. species c. breeding populations d. races e. all of the above

A frameshift mutation could result fromA) a base insertion only. B) a base deletion only. C) a base substitution only. D) deletion of three consecutive bases. E) either an insertion or a deletion of a base.