Today in Biology class

[dna9488]

So our professor talked about mating courtships of animals and then went on to talk about marine life and how they survive. We saw a movie about marine life and how they stay alive.

Here is a clip of the movie with a good explanation of whats going on. I think this is fascinating.

YouTube - A Truly Astonishing Natural Illusion - Disappearing Octopus

[dna9488]

Actually here is the clip we saw and talked about. Found this on the powerpoint lecture my professor posted

YouTube - Underwater astonishments

[Shibby]

That along with a book I'm reading makes me realize how much we are just really animals. I just started reading a book called The Red Queen by Matt Ridley. It's more about life being about surviving to reproduce. But we all do what we can to survive, weather it be by camouflage or "blending in" to the life around us. Every move we make to enhance our survival always leads back to a chance to procreate.


side note: I am just a couple chapters in, so I may not have the full picture of the book...

[Turbo3000]

That along with a book I'm reading makes me realize how much we are just really animals. I just started reading a book called The Red Queen by Matt Ridley. It's more about life being about surviving to reproduce. But we all do what we can to survive, weather it be by camouflage or "blending in" to the life around us. Every move we make to enhance our survival always leads back to a chance to procreate.


side note: I am just a couple chapters in, so I may not have the full picture of the book...

SHIBBY. Nice to see you post. :clapback:

Hope you and the family are good.

[Shibby]

SHIBBY. Nice to see you post. :clapback:

Hope you and the family are good.

Everything is good and getting better. Balance is everything.

I was actually going to make a thread directed towards you in about an hour, but I'll give you a heads up. I'm watching "Gamer" right now and it's pleasantly but unexpectedly good. Don't remember hearing about it until I watched the on demand preview.

[Turbo3000]

Everything is good and getting better. Balance is everything.

I was actually going to make a thread directed towards you in about an hour, but I'll give you a heads up. I'm watching "Gamer" right now and it's pleasantly but unexpectedly good. Don't remember hearing about it until I watched the on demand preview.

Good to hear.

I love movie threads directed at me. :thumup:

[dna9488]

Glad to see you posted shibby :)

yes Gamer was a good movie.

I am taking this 300 level Biology class called Ecology/Evolution. Its taught by 3 different professors. So far I love it, we talked about the beginning of time until now in less than a month, lol


In a way I agree with what you're saying. We are all here to reproduce and move on.

What i really found interesting was the circle of life in different species. Many animals produce for the sake of it and other have selected mating rituals.

[Shibby]

Glad to see you posted shibby :)


What i really found interesting was the circle of life in different species. Many animals produce for the sake of it and other have selected mating rituals.

What is the cognitive intelligence level of each category and/or species...?

[dna9488]

What is the cognitive intelligence level of each category and/or species...?

We haven't studied their intelligence. We have looked the reasons why they mate a certain way and how they came to be from their ancestors.

[Turbo3000]

Biology, man I love it.

[dna9488]

Biology, man I love it.

Yea its fun. This class really got my attention again. In biology 101 and 102 I wanted to shoot myself. Gayest shit ever. Sat in the back, slept for a bit, and studied the powerpoints before exams and did well.

This class just opened my eyes, and i am like WOAH!!!

[Turbo3000]

Yea its fun. This class really got my attention again. In biology 101 and 102 I wanted to shoot myself. Gayest shit ever. Sat in the back, slept for a bit, and studied the powerpoints before exams and did well.

This class just opened my eyes, and i am like WOAH!!!

:rofl::rofl::rofl: That is what I did in those classes, I was a chem major and was bored as hell, then I got in molecular cell, and making 100's on the test was a fucking drug for me, I loved reading the entire textbook. I actually started liking school when I switched.

[dna9488]

:rofl::rofl::rofl: That is what I did in those classes, I was a chem major and was bored as hell, then I got in molecular cell, and making 100's on the test was a fucking drug for me, I loved reading the entire textbook. I actually started liking school when I switched.

Yea bro, I am still a Chem major. Analytical Chem raped my ass bro. No curve and about 65% of the class failed, including me :(

You learn valuable knowledge in that class though. Stuff that you can actually apply in the real world and stuff that you can use to work.

[Shibby]

We haven't studied their intelligence. We have looked the reasons why they mate a certain way and how they came to be from their ancestors.

and what is their level on the food chain versus which ones do things simply to procreate and which ones do it as a ritual (awareness to some degree).

[dna9488]

Enjoy my notes

and what is their level on the food chain versus which ones do things simply to procreate and which ones do it as a ritual (awareness to some degree).

I'll go ahead and answer that second part.

When it comes to mating, depending on the species, it will flow right into sexual selection.
Many species use sexual ornaments: Differences in male and female morphology at sexual maturity, beyond primary sexual traits.

Also it comes to Sexual Selection: Changes in allele frequency due (specifically) to competition over mates

Depending on what specie they are, they have to fight for their mate through different forms, such as:
• Scramble: The race to locate a mate
• Mate choice: Competition to be preferred
• Direct contest: Physical conflicts
• Endurance Rivalry: Remaining active longest
• Sperm competition: Post-copulatory competition

They compete for Anisogamy: Unequal gamete size. “Sperm are cheap, eggs are expensive.”
Human example: A human female will produce a few hundred thousand eggs in her lifetime, while a human male will produce trillions of sperm cells


• Competition makes sense, but why be picky?
o Direct benefits
 Nuptial gift
 Territory Access
 Protection
o Indirect benefits
 Fisherian “Sexy Sons” Hypothesis
 Genetic Compatibility
o Pre-Existing Sensory Bias
 Where signal is favored because it “exploits” a pre-existing sensory bias in the receiver (e.g. female), thereby stimulating association and conferring a mating advantage to the sender (e.g. male).
• Example moth: The pheromone contains the same compound that is emitted by fermenting fruit, the moths’ primary food source.
• The major histocompatibilitycomplex (MHC) genes are important for mate choice in house mice.
• Preferences appeal to be innate in females, learned in males, and beneficial for both.
• MHC preferences encourage disassortativemating: mating between different phenotypes or genotypes.

Conventional Sex Roles:
• In sexually reproducing species, males are often conspicuously “competitive” and females are “choosy,” conventional sex roles described by Darwin.

Reversed Sex Roles:
• Where males are the limiting sex, females may be selected to compete for them.
o Many pipefishes, seahorses, and shorebirds
o Female is often larger and/or more conspicuously ornamented
o Males are choosy, females are competitive
• Pot-bellied seahorse males are choosy, females appear not to be.

Flexible Sex Roles:
• Where the social environment varies and neither sex is reliably the limiting sex, males and females may be flexible in their levels of choosiness and competition