Geography, 11.11.2019 02:31 hcoulter15
darwin hypothesized that there are definite steps to natural selection. consider the model for natural selection. describe a scenario that represents this model of natural selection according to darwin.
a) in a population of rabbits, some are brown all year long. when it snows these rabbits cannot hide from predators and they become extinct.
b) in a population of sunflowers, mutations cause some flower heads to produce more seeds. more seeds means that there are more sunflower plants over time.
c) in a populations of birds, mutations result in different beak sizes so the birds do not compete for food in the area. the bird population is made up of birds with many different types of beaks.
d) in a population of bacteria, variations exist due to mutation. the bacteria are subjected to antibiotics. some bacteria die; others survive and reproduce. eventually, the bacteria a resistant to the antibiotics.
Answers: 1
Geography, 22.06.2019 19:00
Sandstones that form in aeolian (wind/desert) environments appear very different from other sandstones, such as those formed in a beach/ shoreline environment and in rivers on land. give three identifying properties for each of the three sandstones that would tell a geologist which depositional environment they formed in. consider things such as the relationship between transportation and grain size, shape, roundness, sorting, fossils and composition.
Answers: 2
Geography, 22.06.2019 21:30
Name the river that forms a natural border between new york and new jersey and is the site where a passenger jet made a miraculous landing on january 15
Answers: 2
Geography, 23.06.2019 09:00
If u make mistakes on a school trip to knotts like standing up on a ride too early and they ask you not to do it again or and if you do it again you will be escorted out will it go on my student record? yes i know it is a dumb question
Answers: 1
darwin hypothesized that there are definite steps to natural selection. consider the model for natur...
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