If a scientist finds the remains of a plant between a rock layer that

contains 400 million-year-old Phacops fossils and a rock layer that contains

230 million-year-old Tropites fossils, how old could the plant fossil be?

Describe three examples of materials that have resulted from a lack of decomposer activity

Look at the scientific names for the two organisms below: Felis domesticus Felis bengalensis What can you tell about these two organisms from their scientific name?

Coral reefs protect beaches and shorelines from damage caused by__? A. pollution B. waves C. humans D. other organisms

Which of the following correctly describes what a mutation is? A. A change in in the DNA code of an organism B. A change to a gene of an organism C. A change to the nucleotide sequence D. All of the above

Matching: Match the word on the right to the correct word on the left. 1. Homozygous Recessive A) 2 allele versions of a gene 2. Heterozygous B) Hh 3. Homozygous Dominant C) LL 4. Genotype D) physical trait 5. Phenotype E) gg

When earth completes a full rotation how much time has elapsea a. 1 day b. 1 month c. 1 week d. 1 year

Which is a problem associated with a declining population size? A. An aging population B. Scarce food supplies C. Limited health care

What can happen as Argentine ant colonies grow and split off to make new colonies?

The primary role of oxygen in cellular respiration is to

In snapdragons, red flower color (R) is incompletely dominant to white (r), with heterozygous plants being pink. The broad-leaf allele (B) is incompletely dominant over narrow leaves (b), with the heterozygous plants having medium-width leaves.