New Comments on Serendip

This revision includes improved explanations, questions and figures. These changes are designed to improve student understanding and retention of important concepts. I am grateful for helpful comments and suggestions feedback from Dusty Carroll, Carrie Chait and other teachers.

Ingrid Waldron

This revision includes improved explanations, questions and figures. These changes are designed to improve student understanding and retention of important concepts. I'm grateful for helpful comments and suggestions from Dusty Carroll, Carrie Chait and other teachers.

Ingrid Waldron

This is essentially a new activity with a more sophisticated simulation of the spread of infectious disease, improved questions to foster student understanding of the underlying processes that result in exponential or logistic growth, and expanded analysis of patterns of population growth.

This is essentially a new activity that helps students meet the Next Generation Science Standards by engaging in multiple science practices as they investigate the contributions of smell and taste to the perception of flavor. Students also learn about the contributions of receptor molecules, receptor cells and the brain to sensation and behavior.

the idiot affirms, the smart man questions

The idiot can only understand within the confines of his perception

The smart man understands his perception is limited, therefore, SUBJECTIVE

We can't see infrared with our own eyes, yet it still exists.

Nice article.:)

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hey could you please help with citation, how do you cite this information

That is so very well written, thank you! You have such a good point and I can't agree more. I hope people start to realise the positive effects of psychedelics and not judge them too quickly because of the taboo that drugs have. I'm 16 and despite the fact that I've been so terrified in my bad trips, I've also learned a life lesson. I used to be a really mean person, but after I saw the horrors in these parallel dimensions or the DMT world, I began to love everything. Appreciate life for what it is, and be thankful for the things god has given me. I'm not complaining anymore over small things anymore. Psychedelics is truly a method to reveal the true world we live in. It increases your awareness so profoundly, that it will be life changing. This is not a drug and it's certainly not fun either, in my opinion. It can be fun, but it's not meant to be used as party drugs. The main purpose of psychedelics, is to be teached about certain things, see life from other angles, get a bigger view of what 'life' really is. Get a greater awareness of what the 'I' is and get to know yourself better. My first trip was a bad trip. I made an overdose of psilocybin with tons of lemon. A lemon TEK, I believe it's called. I locked my door in my room, and covered the curtains, so it was COMPLETELY DARK. After that, I've never been the same as I was before. I'm a much better person, now that I finally saw the meaning of everything. And no I'm not delusional, what you see on a mushroom trip is not an illusion. It's a tool to see the true reality. But I won't get deeper into that, due to the fact that the experiences are quite subjective, EVEN though there's many familiar experiences on ayahuasca and salvia, the two most powerful hallucinogens. Much love, Michael <3

You sound a lot like someone that means a lot to me, and I had to pull away as every drug addict thar is heavy on thr usage usually manipulates and lies to get their fix, pushes ppl out that want to help, and is so lost that they dont value who values them, that way they end up hurting, as he did to me-- buT I cant say much becaus Iam a drug addict as well, in a siffetent levrl and really ready to quit but eas afraid it would push him away.. oh well now i see ny life is wirth it. Anyway, hope you are bot him, b3cause your talk is exactly what happens to him ... were yOu a vasketball player ?.

Do we have any solution for this. any medicine. any example who cured of PPA

Thank you for the response. The textbook I've used (Campbell's 1st Canadian Edition - 2014) actually does make this distinction:

"This law [of independent assortment ] applies only to genes (allele pairs) located on different chromosomes - that is, on chromosomes that are not homologous - or very far apart on the same chromosome." (p. 288, chap. 14- the next chapter discusses the chromosomal basis for genes on the same chromosome independently assorting)

I actually find this particular point to be a really great opportunity to have students apply their knowledge of crossing-over to figure out that we actually do see independent assortment during meiosis II. I ask my class, "can we have independent assortment during meiosis II?" and the answers are split between yes/no. This leads to a discussion. Without considering crossing over, we wouldn't see any effect of independent assortment in meiosis II. But with crossing over, you can! I like how this discussion forces the students to make connections between different topics.

I totally understand the need to simplify and while some may consider this a detail worth skipping, I think it extends the learning process to deeper levels (e.g. higher levels of Bloom's taxonomy). And of course even adding this detail is still simplifying the processes.

Thanks again for sharing your resources and getting us instructors thinking more about pedagogy!

I wrote an entire book, actually.

I don't exactly know what to call them, but i remember that once i heard of a house being looted or robbed when i was 16, till now, i sometimes have dreams where i am trying hard to lock all doors and call the police and trying to save my family from being looted.
I sometimes wake-up at night to check all doors and locks because i don't trust my main house gate is secure... anybody could climb in from that gate. when i wakeup to check doors, my heart is racing and i controll my breath from panting and i am in extreme fear and my body freezes and its hard to move. this has happened 2 times i think. but dreams were very often.
I never could watch horror movies and seasons where there was a lot of blood shed or killings, because i couldn't stand it, and it gets on my nerves... Even if i watched it; i'd cover my eyes or look away in such scenes. for among you which have watched season "Gotham", I would feel like those asylum inmates were calling out my name and it freaked me out.
Once i felt so vividly that a women was in my house hiding from me and watching me, i was so scared that i couldn't even wake somebody up.
It has happened once that i don't have controll over my thoughts, and a face in my mind teases me, laughs, and i feel like im being watched, my heart beats fast and hard, i find myself unable to move out of fear, only a sight of a person of my family around me calmed me down then.
Last year there were two earthquakes here in Pakistan, (i live here), and i'd often wake up feeling strongly that the walls were shaking, i even yelled at my sister for not waking everybody up during an earthquake, (because when i woke up, she was already awake, studying). I even woke my family up at 3 once, shouting that it was an earthquake, and it wasn't. After this i realized myself that its all in my head, and it never happened again. In past 5-6 years, My nights flooded with CHASE DREAMS, every night, i'd see myself being chased by someone, could be a monster, a robot, an army, a thief, a killer, a cat, a dog, a snake, a catastrophy and many more, in different places etc.
I sing everytime I get scolded, It is sometimes very awkward, but i sing 80% of the times.
I had given up on me, till recently. I had a kind of a flashback or a nostalgic feeling of a time, when i actually felt like living, i had forgotten what it felt like... but that feeling reminded me that there is so much more to life than what i am doing. That is why i am startin to look for help, i want to be alive again.

Blessings upon you,
I am 20, girl. All i remember from when I was a kid is that I was a freaking ambitious girl. Very energetic, with an intelligent brain, Ready to change the world, ready to fight every hurdle that will ever try to stop me. What I am now is an overweight, anti-social, looser with an acne problem, whose life is a complete disaster. My journey from the past-me to present-me is full of many experiences. I remember making patterns when i was a kid. the floor of my house was marbled in two colors -red and white. I'd walk in a specific way such that my left foot never touches white and my right wouldn't touch red. It felt like the left foot doesn't deserve to be in white, and it was a "bad foot". I would practice walking like this all the time. Another thing I did was that i never opened my fists. I always had something in them, could be a pencil, a button or even a piece of thread,-anything useless which i'd never throw away- in both of my hands, i wouldn't open my hands to grab support even when i'd fall. All my life, I spent trying to be "perfect". Yes, Perfect is what I have been trying to attain all these years, turns out, still i ended up being the opposite of it. I remember when i was young, and didn't know about the meaning of word, I asked my mother, She and my brother, (who is three years older than me) laughed at me not knowing the word, I was 4 at max at that time. That moment kind of stuck with me, and i never asked anyone if i didn't know something because i felt embarrassed, and i think that's what stopped my growth process. My childhood was rich in incidents where my parents would have a fight. It was only verbal. Those times are a big part of my life. I couldn't let go of them for 18 years, until i decided to let go of them, guess what? i still can't let go. I just don't recall them again and again like i used to before, but i still care about that because i consider that part of my life responsible for destructing me. I also hold on to people and places I knew in childhood real hard. Recently i met a class fellow of grade 4, (we never saw eachother since grade 4). He didn't remember me or 90% of our class mates, but i remembered 95% of the names and all the faces and even incidents that happened at that time, -even the one which had nothing to do with me, or i was not a part of them. I loved each and every person so so so hard that no words could describe my love for everyone, my family, my teachers, my friends, my non-friends, my neighbors, even the people who never knew me, or the the ones i never saw twice. I loved others just the way we breath, 24/7 all my life. Always Being perfect, being the one that forgives, the one that sacrifices, the one that cares, the one that never betrays, the one that's always there for you with open arms no matter how you treat me. I developed a phobia of not-being-perfect. I would recall in my head all the stories and jokes i had ever heard or read, just for the fear of loosing them. I had guilt, extreme guilt for moments i embarrassed myself in front of people. Maybe thats why i became anti-social. I always knew that i was the odd one. You all should know that when a childs parents fight, the child decides in its brain, "a bad parent' and the other one as "good parent". And most likely all of his life, he would blindly believe that the "good parent" is always right. In my case, i chose it to be my mother. I thought of her as perfect. I would make explainations to each of her actions in my head, which she would have not even thought about. I'd fight with my dad for being a bad dad, and a bad husband. I don't know to this day if my parents failed being good parents. I strongly believe that Parents need to be very cautios of their childs mental growth in its early ages. Beacause a childs mind has no experience to seperate right from wrong, or even to know that whats once right, cant always be right. I still have guilt of so many thing in my life, some of them are so stupid even i sometimes laugh at myself for having guilt for them. Its just because i want to give all i have to the world. To the people who need it. I always wanted everyone to happy be even at the cost of me being crushed under a tank. People just never could understand my love. I used to have an irritating dream that i was upside down my body balanced on my head and i was facing a wall, i could neither speak, see, nor stand up straigh... i think it was kind of a trauma thing. As years passed, i came to know that my dad was the only one who beleived in me, (when i started transforming into a failure). He is a man of few words, he wouldn't say much but i knew he said on 1-2 occassions that i had more potential than anybody. That feeling that was enough for me to live with for the rest of my life, until one day. I was 15 at the time. That day, my parents had a fight again, and i remember him saying to my mum abouit me,'Maraam is decietful". I shattered. I am in tears even rightnow, while typing this. Like HOW COULD MY DAD MISUNDERSTAND ME? HOW COULD HE SAY THIS EVEN WHEN I AM CLEAR AS CRYSTAL? WHY WOULD HE NOT KNOW ME? WHAT DID I DO?? That night i cried myself to sleep, and next day wokeup a worthless looser whose roots had been chopped of in a single jerk. I once had to hold my mum's arm for an entire night and woke up again and again, beacuse i thouht that wind would take me away from my room out of my house. And it was not even windy that night. In the mean time i kept gaining weight. To the point I weigh 84 kg now and i am barely 5 feet. You can imagine how ugly i look. My face is naturally very pretty. People often tell me that I am pretty, but a physically fit person is way more desirable than pretty. I always felt guilty for not being what i was supposed to be, I am very intelligent with maths, (which ocd patients usually are, for the love of patterns i think). One thing i noticed is that i felt relieved after solving questions of mathematics. And i'd fill 4-5 registers with maths practice in every exam season. I never studied any other subject this much. All my class fellows and even teachers knew that i took 1/10 th of the time an average person does to pick a maths concept, But i still never scored higher than a B in the subject. Just because i didn't study. I do nothing. I procrastinate all the time. i am a perfectionist. And my whole room is a mess, (i share it with my younger sister). I am a complete opposite of what i want to be. thus has lead me to dissatisfaction with life. I am extremely dissatisfied. I also stare people i envy to the point they feel uncomfortable. Girls get annoyed and guys start thinking i have crush on them, which again troubles me because i don't want anybody to think that i am a stalker. because i am not. i cant help staring because i do it unintetionally. Whats torubling me now is that i have taken a 180 degree shift in last year. I am starting to forget my childhood memories, I even forget homework, i forget waht people said, or what happened maybe because i have stopped caring. i dont care anymore, Though there are something that make me go made, like now while i am writing this, i donot want anybidy to know that i am, and whoever enters my room, i'd change tabs and pretend im studying, thats basically what i do all the time. I am extremely anti-social with people i am not friends with. I could spend three days without saying a single word to a person if a dont want to. I just cant do something im told that im supposed to, maybe its like im done doing things im supposed to.., but no, i cant do it even when i try. For examle my dad tell sme to talk to guests that visit us more than just greeting. I find it very very hard to do that. I don't like guests, I cant talk to them, i find myself in constant struggle of what to talk about. I am a crazy person. i dont even take my meds. At first i thought its because im lazy but then i noticed i don't take them even when iam standing next to my medicines. Whenever my dad tells me to be normall, i say okay, but in my head im like,"screw you! you are the one that screwed my life. Im never gonna change" And that's it. I know you all be thinking i am a maniac, maybe i am. I don't even know if i need help or I should keep living this fucking stinky life till the day i die. I used to regret loosing my potential, but now i pretend as if it was never there and i was born a looser. Who does nothing, owns nothing, deserves nothing. Maybe its all just because iam an introvert, I just hope i find someone who is like me just so that i can die knowing that i was not the odd one.