Two students are conducting an experiment to investigate the effects of fertilizer on plant height. Which of the following is an appropriate hypothesis for this experiment? a. Experimenting in the same greenhouse will keep the experiment controlled and valid.
b. The students will measure height in cm for all plants.
c. The amount of fertilizer given should remain the same for half of the plants.
d. As the amount of fertilizer increases, the height of the plants will increase.

Cold case files recently began re-investigating an old murder case. the murder took place in the park; a young man, james, was hit over the head with a brick and killed. police suspected the jealous former boyfriend of james' wife, karen. whoever killed james may have washed their hands in a near-by bird bath as detectives found blood in the bird bath. since the murder took place before dna fingerprinting was available, the suspected killer, ronnie, went free. detectives are now reviewing the blood evidence using dna fingerprinting. based on the dna fingerprints of all possible suspects, who is james' killer?

“in 1492 columbus sailed the ocean blue” is an example of: a)explicit memory b) procedural memory c) semantic memory d)episodic memory

Choose the best definition of allele. a. one of several possible versions of a gene, which each produce a different phenotype b. an organism that's purebred for a given trait c. the process of fertilizing a plant with pollen from another plant d. a set of genes that are located on the same chromosome and so are tightly linked