True or false:

1. A Scientific theory is just an educated guess about why something occurs.

2. Taking many measurements and averaging the results may correct random errors in data.

3. A good experiment must have one factor that can be manipulated.

How do phagocytes fight pathogenicmicrobes? They attack antigens with guidance from antibodies They mark antigens with antibodies that target them They surround and engulf foreign objects and organisms They physically block infectious organisms from

How can the mechanical advantage of a lever be increased? A) by applying a larger force B) by making the lever shorter C) by applying the force farther from the fulcrum D) by moving the fulcrum away from the load

What are the two main principles of Mendelian genetics?

What are the instructions that tell the cell everything it needs to survive? A. mitochondria B. nucleous C. Ribosome D. Endomembrane System

Inheritance of skin color in humans is dependent not only upon the melanin synthesis genes but also upon a number of other genes. What type of inheritance is exhibited in this case?

Describe the role of stem cells in multicellular organisms

At its peak, the Roman Empire encompassed a land area that included present-day A. China B. Poland C. Spain

Developmental psychology is the field that primarily studies how humans grow and develop.

Why can polyploidy individuals lead to speciation fairly quickly?

The primary care provider has prescribed a karyotype for a newborn. the mother questions what the type of information that will be provided by the test. what information should be included in the nurse's response?