The group members met on Saturday working on the project together.
The following sentence has a misplaced modifier.
O The group members who were working on the project together met on Saturday.
O Working on the project together on Saturday, the group members met
On Saturday, the group members who were working on the project met together.
The group members met working on the project together on Saturday.

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.

1. law of superposition: when there are horizontal layers of rock. the layers at the top are the youngest.

2. law of uncomformity: where one layer is much younger than the previous one, therefore creating a gap in the time record.

3. inclusion: when there is a solid stone inside of another.

4. intrusion: a feature formed when a stone is filled with magma.

hope i answered your question.