1. There are 2 types of worms: worms that eat at night (nocturnal) and worms that eat during the day (diurnal). The birds eat during the day and seem to be eating ONLY the diurnal worms. The nocturnal worms are in their burrows during this time. Each spring when the worms reproduce, they have about 500 babies but only 100 of these 500 ever become old enough to reproduce.
a. What worm has natural selection selected AGAINST? diurnal worms FOR? nocturnal worms
b. Darwin 's 5 points: Identify the 5 points in the scenario above.
Population has variations. There are 2 types of worms in the area (diurnal and nocturnal)
Some variations are favorable. Birds do not eat nocturnal worms (nocturnal worms advantage)
More offspring are produced
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There are 3 types of polar bears: ones with thick coats, ones with thin coats and ones with medium coats. It is fall, soon to be winter. The temperatures are dropping rapidly and the bears must be kept warm, or they will freeze to death. Many of the bears have had 2 cubs each but due to the extreme temperatures, many mothers only have one cub left.
a. What bear will natural selection select AGAINST? thin coats FOR? thick coats
Darwin 's 5 points: Identify the 5 points in the scenario above.
Population has variations. There are 3 types of bears (thick, medium, and thin coats)
Some variations are favorable. Thick coats provide warmth to survive (thick coat advantage)
More offspring are produced than survive. Half of the total cubs born survive
Those that survive have favorable traits. Bears with thicker coats have a higher survival rate
A population will change over time. Survial rate of bears with thicker coats rises, population of bears with thin coats will gradually decrease
3. In ostriches, there are 2 types: ones that run fast and those that run slowly. The fast birds can reach up to 40 miles an hour. Jackals love to eat ostrich, and they can reach speeds of up to 35-40 miles per hour. A flock of ostrich will lay approximately 10 eggs (each mother only lays 1), but many rodents break into the eggs and eat the fetus before they
With the worm bass are taken freely, though rarely of above a pound and a half, and rock bass and sunfish in plenty. The first rock bass prepared for the pan disclosed the yellow muscle worms in the thick flesh of the back. He may have been the only one so afflicted in the lake, but investigation went no further. Fish were so plenty it was no sacrifice to let the rock bass go, and he is a wonderfully numerous individual here — pestiferous when you don 't
Black bears have a medium to heavy frame with large ears and powerful limbs. The black bear has a coat that can differentiate from brown, cinnamon, blond, grey-blue, and of course, black. They can adapt to their environment easily but are normally found in forested areas. It has a diet that consists of fruits, buds, berries, nut, insects, and food lest by humans. They are incredible climbers that can use their claws to extract food from the trees.
Have you ever wondered why particularly in Alaska, bears need to stock up on food before winter comes? all the bears particularly in Alaska, need to stock up on food before winter comes because when winter hits food goes away. In the text it states " When the cold Alaskan winter hits, the bears’ food supply disappears. Temperatures drop, freezing the streams where tasty salmon swim. The berries that the bears snack on vanishes".
The arctic tundra biome is a biome located in the arctic circle, in such places as north Canada, Russia, Alaska, Iceland, Finland, and most of Greenland. Covering approximately 20% of the Earth 's land surface, the arctic tundra biome is the coldest biome on Earth, with winter temperatures averaging at -34°C (-30°F), and summer temperatures of around 3-12°C (37-54°F). The moderate summer temperature allows this icy biome to sustain life. Yearly precipitation is a low 15-25 centimetres (6-10 inches). The ground in a tundra biome has very low nutrients,which accounts for the low amount of plant life.
The amount of arctic sea ice is declining more than ever. Polar bears are being greatly affected by the decreases in sea ice. (Doc A) This is affecting their diet because without enough sea ice it has been very difficult for them to catch seals to eat. Also, their population is decreasing due to the longer periods between hunts.
They will eat small insects such as mosquitoes, grasshoppers,
Darwin’s theory of evolution: Evidence: Lamarck’s theory of evolution: Evidence: How did the polar bear evolve? Evidence to support Darwin and Lamarck’s theory of evolution. Darwin’s theory states “Phenotypic variation exists among individuals and the variation is heritable.”
Plants are a living thing and need delicate care to grow and not die, plants do not necessarily need dead things but it's good for them to have to compost into the ground. African Nightcrawlers are long worms that are good for fishing. African Nightcrawlers are also very good at digging which makes them excellent plant composters. They aerate the soil and are mostly active at night.
The experimental error that may have caused the deaths was there were too many worms at the beginning. The amount of compost was not adequate to feed 27 worms for 9 weeks. The food supplied the worms with glucose so when there wasn’t enough compost there wasn’t enough glucose to be broken down during glycolysis, transported, or eventually turn into ATP. Because they didn’t get their nutrition, the worms died
The stripes are concentrated on the stomach, and slowly radiate out to cover the entire body. The color of the fur acts as forest camouflage to prevent predator attacks. Their large eyes are front-facing with small, grey irises, and their ears are large and upright. The common name of Short-Tailed Dwarf Lemur is the result of the primates’ unusually short tail.
Predator and Prey Report HYPOTHEIS: H0: I predict that there will be no difference between animals that have strong genes and weak genes. HA: I predict that animals with strong genes would have more opportunity to survive than the ones that have weak genes. INTRODUCTION: Natural Selection is the process by which populations are able to adapt and evolve.
Some researchers believe that the brown bear migrated north in the warmer period and when the cold period arose that group of bears might of became isolated and therefor forced to adapt to the new climate. This idea of evolution may stem back to either Lamarck's or Darwin's theory of
Attention Getter] Did you know that according to the National Park Service, in the mid 1970s the Greater Yellowstone region only inhabited about 136 grizzly bears (United States)? A. The Federal Government quickly protected them under the Endangered Species Act, and that is still in force today.
Discussion: The digestive system of an earthworm is suited to the their habitat underground in many ways. The Prostomium is at the mouth and makes cracks for the earthworm to go through to allow the worm to move around. The digestive system is also suited to the worms habitat because the organs are spaces out so that the worm can stretch out to move through the soil easily. The frog’s digestive system is suited to its habitat because the tongue is attached to the front of the frogs mouth to allow the frog to catch the insect with its sticky tongue and to quickly bring the insect to the frog’s mouth.
The survival and infectivity of larvae on the pasture is affected by a number of environmental factors; with optimal conditions speeding up development. Larvae in pastures rapidly dry out in hot dry weather, but can survive within the dung pat. Their dispersal is facilitated by heavy rain, and the pilobolus fungus also plays an important role as it can propel larvae up to 3 metres away from the dungpat, as it expels its own spores. Livestock is generally more susceptible to contracting lungworms in Europe (cold and rainy), rather than in North America. The parasites thrive in the winter months and as the year goes on and the temperature rises, the parasite numbers and productivity drop dramatically.