1. A scientific explanation that can be tested by making observation and/or experiment is a? A. Hypothesis
B. Theory
C. Law
D. Control
2. All parts of a scientific experiment that are kept constant:
A. Independent Variable
B. Dependent Variable
C. Control Variable
D. Observation
3. Factual Information gathered through you five senses?
A. Observation
B. Compatibility
C. Quanlitative
D. Quantitative

1. a

2. c

3. a

Explanation:

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.

in the year 2850, humans successfully colonized mars. the martian modules that were constructed could hold only a small population of people. it is now a century later, and the population on mars has grown to 600 people. of the current mars population, 45 people express the recessive phenotype for phenylketon- uria (pku) syndrome (pp genotype).

explanation: