Blog 14

 Write a letter to Senator Feinstein describing what alternative energy source you think we should be pursuing. Give at least three reasons why.

               I think a new alternative energy source we should pursue should be solar energy. Solar energy would help ensure our survival more efficently in an economically better way. Compared to fossil fuel or nuclear energy it doesn't really affect us as much. Solar powers are based on biomass,wind, solar,geothermal, and hydroelectic energy. The windmill, for example are good alternative for fossil fuel and are also cheaper than the new electric generation. Another commonly used power would be the solar panals.Solar panals convert light to electricity which applies to other materials using this alternative. Such as solar calculators,water heating, furnances,boilers, and more. Sloar power would also be continously spread and used for more objects.
            So, solar energy would be better to our enviroment, cost less, and is spreading to adapt to human needs

Blog 13

 What was most interesting about this week's dissections?

In the fish dissection I found the swim bladder interesting. It's dark apperance stands out and is pretty large in size. I thought it was part of the liver because the liver is pretty dark but its not. The cell membrane also well protected the eyeball. When we poked it accidently, water would come out. I alos never knew that a fish have two types of bladders: a gallblader and a swim bladder.

Blog#12

 What surprised you from the worm's dissection?

 To me, I was suprized when we dissected the head part. I was able to seee the brain and heart. I was able to dissect the worm by counting the number of lines. I first cut the part from the anus to the clitellum and used pins to stick at a 45 degreee angle to observe the blood vessels and the intestines. Then carefully cut to the mouth to observe the gizzard, heart, pharnyx, brain, ovary, nerve cord, and ect.

Blog #11

Get a picture of alternation of generations put it in your blog and explain how it relates to plants

During animal life cycle, animals are expected to give out eggs and sperms to reproduce. Likewise plants does too but is reproduced through stages, or generation. As the diagram illustrate, the adults have to produce spores, which the spores then produce sex cells. There are two generations:sporophyte ( spore producing plants) and gametophyte(sex-cell producing cells).The two generations can be differentiated by the chromosomes they carry. 

Reference: http://www.learner.org/courses/essential/life/session4/closer1.html

In the spores generation, only one parent is needed to create an offspring with the characteristics it needs to survive.  In sex parents, both give their characteristics  causing a mix. This however can be a benefit depending on their environment. For example, mosses are used as a primitive group. The sporophyte are clearly shown on the stalk representing the location, spores are caste on top. The gameotophye are on the bottom. The stalk connected to the gametophyte creates the egg. Water would be necessary to complete it.

Blog 10

Why is dissection an important part of a biology curriculum? Which animals and/or plants should be included in biological studies?

Dissection is nessecary to use one of our senses to observe. In the process of observing internal structures we can understand the functions. Different specimen parts can be used to compared to others. While dissecting , you would have to take to careful consideration on how the product functions, how it was assembled, and what materials were used. Frogs are included in biological studies to odserve the internal and external structures features of the frog's atonomy.Also, recently our class disected a flower to differeinate its gender and parts.

Blog 9

Define the different forms of community interaction: competition, commensalism, mutualism, predation, parasitism Give an example and a picture for each

Community interactions are factors that can have a huge affect on an ecosystem. In competition, organisms of the same or different species try to use ecological resources,necessities to life, at the same place and time. For example, oak trees compete with other trees for sunlight. As their leaves spread out, they block sunlight for the shorter trees. In competition, they have to follow the competitive exclusion principle,where two species can not use the same resources at the same place and place. Resources must be founded in different areas.

Also, Predation is when an interaction in which one organism captures and feeds on another organism. The organism that captures and feeds is the predator. The organsim being eaten is the prey.An example of predation would be a lion using his characteristic such as strong  legs, sharp claws and teeth to aid him in killing other animals.

In addition, symbiosis is any relationship of two species living closely together. Symbolism is divided into three class: mutalism, commenalism,parasitism. In mutualism, both species benefit from living together. For example, flowers depend on bees to help spread their pollen or nector so the plants can reproduce. In commenalism, one benefits and the other is neutral.Barnacles attach themselves to whales to attain food as the waters pass by without harming  the whale in any whale. Finally, in parasitiam one organism lives on or inside another organism and harms it. The parasite uses a host to attain nutrients. Fleas, ticks, lice, and tapeworms are examples of paratism eating the host's blood and skin.

blog 8

 Your choice talk about something you learned or ask a question about something that is confusing you

This quarter, one topic I learned about is the effect of population. Population is shaped by threee characteristics 1. Geographic Distribution 2. Density 3. Growth Rate. It can change by the number of births, deaths, and individuals that enter or leave the population area. It is usually measued by exponential and logistic growth. In exponential growth, the population reproduce at a constant rate, in contrast with logistic growth which occurs when a population's growth stops or slows.Carrying capacity is also used to display the average growth rate when it reaches zero, so the number represent the largest number of individuals that the enviroment can support.Population density is the number of individuals per unit area. It depends on the species and the ecosystem. Population density is seperated by two types of factors: density dependent factors and density IN dependent factors to limit the growth of a population. Density dependent factors are competition, predation,parasitism,and disease. Density independent factors are unusual weather, natural disaster, seasonal cycle, and  human activity such as clearing the forset or damming  the rivers.However, like many organisms, the size of human population increase during time.