Inna uncovers a fossilized tooth in her backyard. what did she find?
an imprint
a mold...
Inna uncovers a fossilized tooth in her backyard. what did she find?
an imprint
a mold fossil
a cast fossil
an original-remains fossil
choose all the answers that apply.
which of the following fossils contains actual physical remains?
amber
footprint
bone
tooth
shell
choose all the answers that apply.
rapid burial
increases exposure to oxygen
decreases exposure to oxygen
slows down the rate of decay
prevents scavengers from eating organism remains
choose all the answers that apply.
which of the following conditions are necessary for fossilization?
warm temperature
stable geological conditions
rapid burial
exposure to oxygen
presence of minerals
--
what can fossils tell us about past species. choose all that apply.
their closest living modern relatives
their extinction
their potential evolution
their age at death
their life cycle
--
which of the following is the best evidence that an area once had a tropical climate?
dinosaur fossils
coral fossils
fossil fuel deposits
insects trapped in amber
--
dr. sheffield discovers burrows in a sedimentary rock bed. which of the following is the most likely conclusion?
the area was once a forest.
the area was once a lake.
worms once lived in the area.
dinosaurs once lived in the area.
Answers: 2
Biology, 22.06.2019 04:00, smithscarpetcaour4es
In the water cycle , when does water undergo a chemical change
Answers: 1
Biology, 22.06.2019 07:00, Bengynease2598
An ecologist studied the same species of deer during the summer and the winter. she noticed that during the summer, when there was plenty of food, the deer were energetic and playful. however, during winter when food was scarce, the deer moved more slowly and did not run unless they needed to escape a predator. which scientific fact is best supported by her observations?
Answers: 3
Biology, 22.06.2019 13:00, mimivenga
Astudy by solloch and et. al., in 2017, gives the map above which shows the frequency of alleles with a ccr5-delta32 mutations over 87 different countries. this mutation deletes the presence of a co-receptor (ccr5) on the outside of human t-cells (lymphocytes). some viruses, such as the one responsible for the black death and human immunodeficiency virus (hiv), require this receptor for attachment to host cells during the infection process. the black death was an epidemic that passed over northern europe during the 14th century killing nearly 60% of europeans. according to this information, which explanation best explains why northern europeans show a greater immunity for hiv than some other parts of the world?
Answers: 1
Biology, 22.06.2019 19:30, hannahboohoo120
When sodium chloride dissolves in water the sodium cholride dissociates into?
Answers: 1
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