Biology

hey guys, i am a gcse student, so i kinda get that insecticides and herbicides are a type of pesticide? but what is the main difference between all of 3 thanks in advance

Ok so forests(trees) provide us oxygen to breath. But so does bacteria. If all trees are destroyed, would it still be possible for us to live because there would still be bacteria everywhere?? why or why not?

Modern medicine has discovered that this place -- between the backbone and the ribs -- is the place where the cells that will form the testes first grow, and at a later stage of embryonic development they descend to the scrotum below the abdomen. Dr. Muhammad Dawdah says: The scientific fact is that the primordial cells of the testes in the male or the ovaries in the female accumulate in the backs of the parents during the embryonic stage, then they come out of the back from the area between the start of the spinal column and the start of the ribs, then the ovaries migrate towards the pelvis in the vicinity of the uterus, and the testes migrate to the scrotum where …

In humans, of course.

If there are supposedly 56 billion "habitable" planets in the Milky Way galaxy (our galaxy) alone then why haven't we found any signs of intelligent alien life yet? Is intelligent life really so rare that we haven't found any, even though there may billions of habitable planets in our galaxy alone? What is the reason for this?

ScyTek Phosphate Buffered Saline (10x) pH 7.4 is an optimal formulation of pH stabilizers and salts designed to effectively remove excess material from the microtiter plate wells without disrupting the ELISA binding reaction. By maintaining the proper buffering environment, unbound components can be washed away without suppressing antigen-antibody binding interactions, thereby reducing nonspecific background and increasing the specific signal. Our Wash buffers do not contain hazardous preservatives such as Azide or Mercury that may interfere with antibody-antigen binding interactions. For your convenience wash buffer is offered in a wide variety of formulations to meet th…

Was this animal an aborted attempt by echinoderms to evolve into active animals in competition with animals like arthropods? http://paleobiology.si.edu/burgess/hallucigenia.html

Hello everyone, hope that you are enjoying the hot weather if you have any. It's come up recently about milk being more hydrating than water, a link will below to see the page that showed it. Then I hear that milk can be very bad for you as it can lead to certain cancers or bone issues. I just wanted to ask some other people what the story is for this liquid as I'm sure a lot of people like to consume it once in a while. Hope it's not too strange. http://uk.businessinsider.com/milk-water-drinks-research-hydration-powerade-orange-juice-2016-7 -Milk being good for you link http://www.peta.org/living/food/reasons-stop-drinking-milk/ -Milk being bad for you …

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Hey, So i'm learning about bacterial cultures and performing counting procedures. I'm confused as to when you centrifuge you bacterial culture that is inoculated in broth, do you get the bacterial count from the supernatant if plated or do you have to re-suspend the pellet in medium and then plate it? Would love some ideas from you guys

I heard, I believe it was Michael Shermer say during an interview that we know more about evolution than we do electricity and magnetism. Now, I fully accept evolution and am completely a naturalist. I understand (though I'm certainly no expert) that our understanding of evolution is very high by this point so as to make it a fact. But I was kind of dubious of Shermer's statement about knowing more about it than magnetism or electricity. For one, it seems to me (a non-expert) that there is much more involved in the theory of evolution and there are many more mechanisms/degrees of freedom that comprise the theory than there is in electricity and magnetism. I was wondering …

Do sexual orientation and transgender lie on the same spectrum, or are sexual identity and gender identity two separate things? For example, is there one large spectrum that has on one end heterosexuals, then homosexuals further down the spectrum with a range in between the two, then transgender at the other end? Or is there a spectrum covering sexual orientation (from heterosexual to homosexual), where anyone on that spectrum could also fall anywhere on a gender identity spectrum? I've always thought of these as being two different things, but wondered if perhaps a homosexual who shows very masculine/feminine traits normally associated with the other gender, migh…

Hi, I need some help on a question of my Microbiology homework: "What functional group (or groups) of microbes would be most useful in a microbial fuel cell in which electrons are transferred to and from solid metal electrodes? Why?"

Hi, I'm really stuck on this part of my AS biology homework. With reference to theenzymes catalysing the stages of glycolysis, explain how their activity can beaffected. Consider in your discussion if this is a form of intrinsic regulationor extrinsic regulation. 1) Hexokinase: 2) Phosphofructokinase: 3) Pyruvate kinase: I understand these enzymes have a role in converting and regulation but I can't seem to find any information that I can understand. Any help on this would be greatly appreciated! Thank you

I was doing some gardening for my mum today when I noticed an unusual growth on one of my crab apple trees. Does anybody know if this fungus is harmful to the tree or not???

As u may know, dragon exist in the mitologie for so long, but it is possible to exist an animail that throw fire like dragons? I was thinking and I found an possible gas that the animails could produce to be the fuel. (Saddly it is farts, was the only gas that animals could produce that i could remenber and is viable). The second is what will start the fire, guess what, i have no ideia. I cant find anything related to the way that fire starts only what is required on a fire to stay on. However i was thinking something related whit producing eletricity, in order to start the fire. Lets see where this goes.

Does the type of [ultra]centrifuge you use matter? Basically, when trying to use the same protocol using a regular centrifuge, I got very loose and slanted "pellets" which were all but impossible to separate from the supernatant, even after centrifuging longer. I used RCF*time equivalent values to start with. Could it be that a similar protocol just can't be used with a regular centrifuge, or am I doing something wrong?

So we just got a new sequencer in the lab I'm pretty excited to try out. It's a minION high throughput sequencer from Oxford Nanopore technologies and bless its heart it's cute! Supposedly capable of generating about 10 base pairs (bp)/sec for a total of about 110 million base pairs per run, it generates data in real time so you can stop sequencing when you have enough data for your experiment. It generates long (10-2kbp) reads, so we're hoping to pair it with our MiSeq to captialize on the strengths of both systems. It's dirt cheap for this technology at $1000 USD for the sequencer and set up kit, although consumables for it are pretty expensive. We're ho…

I need to know how obesity affects lipid profile? And why levels of high-density lipoproteins (HDL) increases and low-density lipoproteins (LDL) decreases?

What is it that gives raptor birds, like hawks or eagles, such excellent sense of vision? Does it have to do with the placement of their eyes, or is it something much deeper?

If so, why didn't that make them smarter than modern day humans? Why doesn't a large brain necessarily translate to higher intelligence? How many animals out there today have bigger brains than modern day humans?

Do inanimate objects feel pain and can we even prove if they do or do not?

Say we wake up one day to find the earth rotating in the opposite direction. What would be different besides the sun rising in the west? Ignore the physics of accomplishing such a feat and let's assume everything has stabilized (tides, winds, etc). Just wondering about the effects - especially on the living things. In a similar fashion, what would be different if our path around the sun changed direction?

http://www.huffingtonpost.com.au/2016/06/02/how-internet-porn-is-making-young-men-impotent/?ncid=edlinkauhpmg00000001 Hey guys, I was just wondering, how scientifically accurate is this article? Does pornography really contribute to PIED (pornography induced erectile dysfunction)? Does it make men less attracted to females? Any thoughts? Also, is the article saying that simply watching pornography leads to erectile dysfunction or do they mean masturbating while watching online pornography? Is this proven fact? Do we have any statistics on this? What are the latest scientific studies suggesting? Regards, Mr Rayon

Hello. As you may or may not know GCSE students around the Uk (I included) had to sit an exam on Unit 1A Biology this Tuesday (17th May). There were one or two questions that seemed a little odd to put in the paper however afterwards a lot of the students got angry at AQA (the exam board). Apparently, they have started a petition of around 2,000 people demanding an apology from AQA but I'm not all too sure. One of the questions was along the lines of " A drug is tested by an independent company. What is meant by an independent company?". Now this was a little strange but I can understand its placing in the paper. The second question that created anger from students was a…