Question

1. fossils can be used to determine the relative age of rock layers. where will fossils of a more recent organisms be located in undisturbed rock layers? dating of rock

the deepest layer\tabove rock containing fossils of older organisms
always above ground\tbelow rock containing fossils of older organisms

1. transitional fossils are fossils that help fill in gaps in the fossil record. one example of a transitional fossil is tiktaalik roseae. it looks like a cross between a fish and a land animal. which best describes what this organism is an example of? evolution

an organism that is still alive today\tevidence that organisms do not change over time
evidence that organisms change over time\tevidence that life originated on land

1. organisms are able to reproduce in different ways. some are able to reproduce sexually, asexually, or both. which is an advantage of sexual reproduction? heredity

quick\tproduces genetic variation
does not need a partner\tall offspring, not just females are able to produce offspring

1. in winter, flocks of birds made up of different species of birds can be observed foraging together. flocking together allows the birds to find more food and be more alert to danger. the birds all need to consume the same scarce resources, though. what two behaviors do these mixed flocks display? symbiotic relationships

competition and commensalism\tparasitism and mutualism
mutualism and competition\tpredation and commensalism

1. dr. rashad performed an experiment to test whether she could cure a dangerous disease in mice. she found that her cure worked. other scientists did not accept dr. rashad’s findings right away because they had not yet been replicated. which best describes why replication is important? repetition/replication

replication allows more mice to be cured of disease
replication can show if there were any errors in research
replication gives more scientists the opportunity to work
replication would not give dr. rashad data to support her claim

Explanation:

Question 13

In undisturbed rock layers, the principle of superposition states that younger rock layers (and thus fossils of more recent organisms) are deposited on top of older layers. So fossils of more recent organisms are above rock with older organism fossils.

Transitional fossils like Tiktaalik show features of both ancestral (fish - like) and descendant (land - animal - like) groups. This is evidence that organisms change over time (evolve) as traits are modified between generations.

Sexual reproduction involves the combination of genetic material from two parents. This mixing of genes leads to genetic variation in offspring, which can be beneficial for adaptation. Asexual reproduction is quicker and doesn't need a partner, and in some asexual cases, all offspring - producing (not just females) is not a sexual reproduction advantage.

Answer:

above rock containing fossils of older organisms

Question 14