Hey pf! Learning about macroinvertebrates and their relation to stream systems, and I am trying to understand what stream factors affect their distribution and diversity! I understand that flow rate, and substrate for example have an affect, but why exactly flow rate affects macro's is still a...
I know borek, thank you. It gives you the (preparation) reaction mechanism to form phenyl magnesium bromide from bromobenzene and magnesium metal which i understand. It also shows the mechanism to form triphenylmethonal with phenyl magnesium bromide which i also understand. But neither of those...
Homework Statement
Write an equation showing how benzoic acid would react with phenylmagnesium bromide.
Homework EquationsThe Attempt at a Solution
I am not quite sure where to start first with this Reaction. I haven't seen a Organometallic + acid reaction before. I realize that i have an...
Homework Statement
Indicate the positions of the planets in the sky at the times given. I am struggling on how to answer these questions any help would be great any help would be great. thanks pf!
The Attempt at a Solution
1) Jupiter at eastern quadrature around sunset?
Jupiter...
Thank you all for your input i greatly appreciate all of your thoughts! But continuing from what Pythagorean and 256bits stated...The issue that i come across is in how Pythagorean answered my question, in that 2) and 3) are together when i read about them in my bio book. It states that...
Do all annelids possesses that ability to move telescopically or are their exceptions to that found in nature? I was actually aware that through further reading! And your right it does, but it only speaks of the asexual stage which i understand :) It is the sexual stages that i am looking for!
Homework Statement
1) What life stage performs sexual reproduction in Rhizopus?
2) What capability does the body plan of annelids in general give them?
Homework Equations
The Attempt at a Solution
1) Asexual reproduction occurs during the haploid stage while sexual reproduction...
I am having a difficult time understanding altruism because when I think through the concept "cheaters" would be adapted to exploit the altruist. Though, do altruists often die for their efforts? Thus, leaving fewer offspring...
Any help would be great thank you pf!
No big deal Tdod appreciate your help and no it is not; I need to understand the cycle and I don't yet. When I read about it the material only speaks of the arrest occurring at meiosis I it doesn't talk about prophase I
Hey PF! Have two questions about Oogenesis and Spermatogenesis! In human beings when is oogenesis and spermatogenesis arrested until the onset of puberty? I believe it is at Prophase I and at Primary Spermatocytes, but is this correct? Any input would be great!
Thanks PF!
Because i have read that the (rapid) expansion of the universe is a descriptive for inflation and i have also seen the big bang theory defined simply as the instantaneous expansion of space and time...
Hey PF! Have two questions here for everyone. Recently had a professor define the The Big Bang as "the expansion and cooling of the universe from an originally hot and dense state", but is this correct? To me it sounded more like the description of cosmic inflation...thoughts?
Additionally...