3. Describe what it means for an organism to be triploblastic. What structures of the internal anatomy of a clam might lead you to conclude that a clam is triploblastic?

Discuss the flow of electrons in the non-cyclic pathway.

In the early 1700's Edward Jenner demonstrated and was credited with the concept of vaccination. the theory/mechanism surrounding how the immunity to smallpox was achieved is referred to as "cross reactivity. Explain why we don't see much of this anymore or why it might not be exploited more.

The Scenario: Your friend Bob asks you to sign a Change.org petition to encourage your Congressman to propose a bill that would outlaw all stem cell research and treatments. The reason given for this petition is that embryonic stem cells come from aborted fetuses. Assignment: Write a response to your friend explaining what stem cells are and where they come from, making sure to clarify the factual misconception(s) in the petition. Your response needs to accurately explain stem cell biology and be well supported. Don't forget to review the rubric! Please note: a large portion of your grade on this paper will be based on how well you identify the misconception(s) your friend has, and how well you correctly

1. When a cell is respiring, carbon dioxide is in ________ concentration inside the cell, causing it to diffuse out, whereas ________ is in high concentration outside the cell, causing it to diffuse in.

2.which of the following contains the most oxygen? blood entering the alveoli, blood entering the left atrium, blood leaving the right ventricle, blood leaving the tissue.

3.What effect does smoking have on the movement of mucus in the respiratory tract?

4.Frogs use their skin as a respiratory organ. True or False?

Leopold was clearly offering an alternative definition of, and orientation for, conservation. Though it sounds simplistic, for Leopold, conservation required the establishment of a state of harmony between humans and nature, which implied a commitment to two principles: that we strive to understand how the natural world functions; and that we practice precaution in our use of the natural world. These two principles are well reflected in the following excerpts from a couple of Leopold’s better known essays.

Health is the capacity of the land for self-renewal. Conservation is our effort to understand and preserve this capacity. - 'The Land Ethic' (1949)

The last word in ignorance is the man (sic) who says of an animal or plant: "What good is it?" If the land mechanism as a whole is good, then every part is good, whether we understand it or not. If the biota, in the course of aeons, has built something we like but do not understand, then who but a fool would discard seemingly useless parts? To keep every cog and wheel is the first precaution of intelligent tinkering. - 'Round River' (1953)

This call to think ecologically was loudly heard again later in the century with the publication of Rachel Carson’s 1962 book, Silent Spring, which publicized the impacts of agricultural pesticides on wildlife and human health. While Carson’s book was largely read as a warning to humanity, consistent with the shallow, human-centred, form of environmentalism that emerged in the late 1960s, her real intent was arguably to challenge us to recognize our existence within ecosystems and the utter foolishness of non-ecological thinking.

Activity Thinking Ecologically

you are asked to think about how the use of a highly persistent and broad spectrum insecticide like dichlorodiphenyltrichloroethane (DDT) shows ignorance of ecological thinking? Put another way, why would an ecologist think that it makes little sense to use DDT? Can you come up with three (3) points?

Please do little research and provide the reference (thank you )

Mitochondria and chloroplasts are two types of organelles in eukaryotic cells. Current studies suggest that both organelles may have evolved by endosymbiosis of prokaryotes. Describe the functions of these two organelles and propose one structural evidence that strongly supports this endosymbiotic hypothesis.

Two old science fiction movies, Godzilla (1998) and Aliens (1986) depict fictional large female carnivores.  The Godzilla female lives off a large prey population of humans and fishes but has no assistance from others of her kind.  In a few days, she produces hundreds of 7ft tall eggs, enough to fill Madison Square Gardens.  The Alien female lives off a small prey population of a few dozen humans, is assisted by non-reproducing workers and produces hundreds of large eggs in a few weeks.

Comment on what is realistic and what is unrealistic about the life history traits and egg production abilities for each of these 'animals' and what makes them so.  Include a hypothesize as to their life span expectations and their 'Darwinian fitness'.

(can you give a little more detail to help me understand this matter? Thank you.)

Sponges live by creating a current of water that enters the body through the ostia and circulates through their canals and chambers. What vital activities essential for the survival of the sponge are carried out by the creation of this current? Why is this way of carrying out the life activities so suitable for an attached animal?

Briefly outline the processes of mitochondrial fission and fusion; and how dysregulation or disruption of these mechanisms can contribute to disease

Is Alzheimer's disease a chronic disease? Explain

How does size exclusion column work and what are the rate limiting factors in purification method?