Quotes About Biology

Female adolescents are significantly less fertile than 20-year-olds. Female fertility declines gradually during the thirties, and declines steeply after age 40. Women after menopause are infertile. This female fertility profile is a basic fact of life to which male mate choice systems have adapted. Youth is an important cue of fertility.

He theorized that these sex differences (dimorphisms) were due to females being choosier about their mates and males competing more intensely for mates. We now know that Darwin was correct. When mate choice occurs, females typically do the choosing.

In almost all mammals and all primates, females do almost all of the child care, with very little help from males. Males could never be sure which offspring really carried their genes, whereas females could be certain. This uncertainty about paternity leads most male mammals to invest much more in pursuing new sexual opportunities than in taking care of their putative offspring.

Milk-substitute manufacturers have worked very hard for almost a century to convince women that they are not mammals and have no business breast-feeding.

Female orgasm seems poorly designed as a pair-bonding mechanism, but it is perfectly designed as a discriminatory system that separates the men from the boys.

Each trait that we consider sexually attractive already summarizes a huge amount of information about an individual's genes, body, and mind.

Human penises evolved as tactile stimulators for use in copulatory courtship.

The large male penis is a product of female choice in evolution. If it were not, males would never have bothered to evolve such a large, floppy, blood-hungry organ. Ancestral females made males evolve such penises because they liked them.

Every gene in every human body has passed through thousands of penises over thousands of generations of human evolution. Equally, every gene has passed down through thousands of eggs inside female ancestors who chose to copulate with particular males. In sexually reproducing species, copulation is the genetic gateway from one generation to the next, which is what makes it so important evolutionarily, physically, and psychologically.

Speaking as a biologist, I think women are less aggressive than men, and they play a larger role in the early education of the young and helping them overcome their genetic heirloom.

Many differences are rooted in biology and reinforced through culture, so it's important to acknowledge that. Because if you say men and women are the same and if male behaviour is the norm, and women are always expected to act like men, we will never be as good at being men as men are.

We say women have made great strides: in biology, in many areas of chemistry, in many places, women are now the majority of medical students. But when I began my career, that wasn't the case. There were very strong stereotypes in biology and medicine.

Women have a better sense of smell than men do, and it's even sharper in the middle of their menstrual cycle, when estrogen levels peak and women are more likely to be deciding whether a man's attractive.

Women are very attracted to a low voice because it's linked to testosterone, which for millions of years was a sign that men had very good spacial skills and would have been very good at hunting and finding their way back home.

For me, men and women are different. A man is genetically gifted to pull more than a woman. But at the same time, I don't consider women to be any less than men. In fact, I feel we are far more intelligent than them.

Estrogen's a wonderful thing. I'd be doing the dishes and suddenly be like, 'Wait a minute - why am I crying?'

As biologists, we contemplate with admiration and awe the wondrous array of sophisticated cell interactions and recognitions evolved in the T cell immune system, which must be a model for other similarly complex biological systems of highly differentiated organisms.

It has adopted the geometry most advantageous to the species or, in other words, the most convenient.

Words originating from the verb 'to die' were frequently used when I described my initial plans to determine the ribosome structure.

Every cancer looks different. Every cancer has similarities to other cancers. And we're trying to milk those differences and similarities to do a better job of predicting how things are going to work out and making new drugs.

You are literally never alone. While there are roughly 6.7 billion people on Earth, you may not feel that many of them at all care very much about your existence. But within your colon alone are living at least 1012 billion organisms, or roughly a thousand times the number of people on the planet. Stop your metabolic processes, and you stop theirs.

In essence, we're imaging the same cell for anywhere from forty to a hundred thousand times to create one of the movies that we see.

The majority of modern medicines originate in nature. Although some mushrooms have been used in therapies for thousands of years, we are still discovering new potential medicines hidden within them.

Human beings have been manipulating the biological world for thousands of years without understanding how DNA codes function.