Blog 14 LAST BLOG Compare vertebrates (the fish) to invertebrates (worm, crayfish, grasshopper, starfish)

The fish, a vertebrate, has a backbone while the invertebrates do not.

Invertebrates are multicellular, have no back bone or cell walls, they reproduce sexually, and they're heterotrophic. Vertebrates, have a well-developed internal skeleton, a highly developed brain, an advanced nervous system, and an outer covering of protective cellular skin. 98% of animal species are invertebrates while 2% are vertebrates. Invertebrates are Small and slow moving, while vertebrates are Big in size.

Blog 13: Compare the circulation of a segmented worm a starfish and a grasshopper

Segmented Worm: The segmented worms, like the earthworm, are more advanced in their construction than flatworms as they possess a complete digestive tract with an anus to allow undigested matter to pass from the body. They also have a circulatory system including hearts that pump the blood through the system and also have an excretory system to rid the body of toxic products of respiration.

Starfish: The starfish has radial canals that go through all the legs and join in the center to make the water vascular system that functions as a circulatory system, waste removal and more.

Grasshopper: Grasshoppers have open circulatory systems, with most of the body fluid filling body cavities and appendages. The one closed organ, the dorsal vessel, extends from the head through the thorax to the hind end. It is a continuous tube with two regions: the heart, which is restricted to the abdomen; and the aorta, which extends from the heart to the head through the thorax.

Blog 12 Compare and contrast the animals and plants you have dissected so far based on one organ system, i.e. reproduction how are they alike

We have dissected a worm which was very disgusting, a grasshopper , a flower which was very beautiful and starfish which was also very nasty.
These four living species are very different from eachother. The worm is distinctly different from the grasshopper because the worm has no bones or structure while the grasshopper has both. Something they do have in common is that they're both creepy crawlers. The starfish and the flower also have little in common. They both need water to survive. The flower is beautiful and smells good while the starfish smells like fish.

Blog 11 What are at least three ways to prevent soil erosion?

One way to prevent soil erosion on residential landscaped gardens and vegetation and crop properties is to plant flowers, trees and crops over the affect soil. Plants act as protective shields to the soil lessening the impact of rainfall, wind, excessive watering and ice melt. The plants will also help stabilize the soil and prevent it from becoming prone to soil erosion. Some popular soil erosion prevention plants are: wild flowers, crop veggies, small trees and herbs. Plants which crawl up and spread instead of growing upwards are also great soil erosion prevention plants.

One common product which are most commonly used on residential properties, vegetation crops and vacant land is matting. Matting is available in wood fibres which make it environmentally friendly and biodegradable. The matting will be placed on the soils surface and prevent erosion from occurring. The matting will allow plants, crops and trees to grow through it and the soil will be healthy and stabilized. Matting can be cut to size to suit your property.

Another soil erosion prevention method which is beneficial to the soil and plants which live in it, is applying a layer of mulch and fertilizer over the soil. The mulch and fertilizer layer will assist the soil to soak in water slowly and it will also lessen the impact of rainfall as it penetrates through to the soil. The mulch and fertilizer layer will also stabilize the affect soil by regaining its PH levels to be healthy and neutralized. Any type of mulch or fertilizer can be used to prevent soil erosion.

Blog 10: Explain how contamination of one animal in a food web can affect other animals

if one animal is contaminated and another animal eats that animal then it affects the animals that eats that animal and then all of them become contaminated.

Blog 9 What geologic era do you think was the most important why?

I believe that the most important Geologic era would be Cenozoic era, because we are living it. The Cenozoic era began 65mya and continues to be the present. This event also marked the beginning of the mammals, this is important beacause we humans are mammals. We make this Cenozoic era important because us humans have done so much in the world for example created and discovered things in science.

Blog 8 Give examples of the different types of natural selection. Give an example for each.

There are many different types of natural selection but here are two.

One example of natural selection would be Stabilizing selection : this is when two traits are used to create a third trait that uniforms the two other traits so that they wont be so far alike.For example, when I take a shower in the morning in order for me to be comfortable with the water I have to balance out the water between hot and cold, which makes warm. That is how i become comfortable with taking a shower.

Another example would be Directonal selection, this type of selection is used to pick out one specific trait. For example , say if I only want to choose a house with a pool I would locate all the houses near me that have pools. This way I'm choosing exactly what I want.