blog#9

competition: interaction in which organisms of the same or different species attempt to use the same
                   ecological resource in the same place at the same time. 

mutalism: symbiotic relationship in which both species benefit from the relationship.

Predation: interaction in which one organism captures and feeds on another organism.
  Parasitism: one organism, the parasite, benefits at the expense of the other, the host

blog#7

Desert Biome: 
Usually very hot
Chilly at night
10 inches or less of rain per year
Precipitation is mainly rain
Located mostly around the Equator
Covers 1/5 of world's surface
Many varieties of plants and animals live there
Plants of the desert can usually store water
Animals can get water from unusual places
Plants and animals that live there can adapt to the extreme weather conditions.
Some animals avoid heat because they are nocturnal.
Some animals avoid heat by staying underground.
Deserts plants can store water.


Tundra Biome:
Soil is frozen most of the year.
10 inches or less of rain per year
Covers 1/5 of world's surface
Some plants grow close together to protects themselves from the cold.
Biome farthest north
Trees are small.
Plants and animals that live there can adapt to the extreme weather conditions.
Very short summer - some plants and small organisms may have a chance to grow.
Animals are able to adapt to cold.
Plants are small and grow close to the ground.
Water is not available most of the year.

blog#6

The most important level and/or part of the food pyramid is the grains. The grains give you  carbohydrates, which give your body energy to do stuff. The grains that give you the energy from the food pyramid are bread, pasta, cereal, and rice. The carbohydrates in these grains break down glucose into molecules. To others they might think that the other parts of the Food Pyramid may be important, but to me the grains are important.

the 6th major extinction

Humans may cause the sixth major extinction. Biologists estimate that the extinction rate for species is 100 to 1,000 times greater than normal "background" extinction due to human interference. Humans impact species in numerous ways. This includes spreading diseases, destroying habitats, hunting animals to extinction or introducing alien species into new environments. Harvard biologist Edward O. Wilson estimated that as many as 30,000 species go extinct every year.

Jupiterimages/Thinkstock

what is microevolution?

Microevolution is simply a change in gene frequency within a population. Evolution at this scale can be observed over short periods of time — for example, between one generation and the next, the frequency of a gene for pesticide resistance in a population of crop pests increases. Such a change might come about because natural selection favored the gene, because the population received new immigrants carrying the gene, because some nonresistant genes mutated to the resistant version, or because of random genetic drift from one generation to the next.

why is fossil record hard to interpret?

 Ffossil is hard to interpret because the animals' or plants' are at least 10,000 years ago, so it is very hard to tell the shape or species or the animals' or plants' fossils.  In addition, the paleontologists always break the fossils to take the main shape out, so a lot of fossils do not have enough parts on them.  Getting a fossil also is hard since the paleontologists are getting the fossils under the heating sun and inside the ground.  On the other hand, interpreting the fossils also can become easier because some ants are helpers who collect the tiny pieces of fossils under the ground.  To sum up these reasons, interpreting the fossils is a hard job, and we need to appreciate the hard works of the paleontologists.

Why is evolution a theory not a law?

An evolution cannot be a law because a law is a fact.An evolution is a theory because a theory is an EXPLANATION for facts.