Population Changes Darwin, genetics, & natural selection in action

Charles Darwin He was a _____________ scientist. Collected thousands of __________ and _________ samples along his boat journey on the Beagle In the Galapagos, he found ___________ that looked just like ones he’d seen in ______________ - a place far away from their current location. Similarities: Their _________ were suited to the way they gathered _______.

Charles Darwin He was a naturalist scientist. Collected thousands of __________ and _________ samples along his boat journey on the Beagle In the Galapagos, he found ___________ that looked just like ones he’d seen in ______________ - a place far away from their current location. Similarities: Their _________ were suited to the way they gathered _______.

Charles Darwin He was a naturalist scientist. Collected thousands of plant and animal samples along his boat journey on the Beagle In the Galapagos, he found ___________ that looked just like ones he’d seen in ______________ - a place far away from their current location. Similarities: Their _________ were suited to the way they gathered _______.

Charles Darwin He was a naturalist scientist. Collected thousands of plant and animal samples along his boat journey on the Beagle In the Galapagos, he found finches that looked just like ones he’d seen in Ecuador - a place far away from their current location. Similarities: Their _________ were suited to the way they gathered _______.

Charles Darwin He was a naturalist scientist. Collected thousands of plant and animal samples along his boat journey on the Beagle In the Galapagos, he found finches that looked just like ones he’d seen in Ecuador - a place far away from their current location. Similarities: Their beaks were suited to the way they gathered _______.

Charles Darwin He was a naturalist scientist. Collected thousands of plant and animal samples along his boat journey on the Beagle In the Galapagos, he found finches that looked just like ones he’d seen in Ecuador - a place far away from their current location. Similarities: Their beaks were suited to the way they gathered food.

What Darwin Thought A _________ is a form of a genetically determined characteristic. _________________ _________________ is the human practice of breeding animals or plants that have certain desired traits. Example: Certain traits of __________ and _________ were bred into dogs needed for hunting as well as domestication. Darwin realized: any ________ can produce many _____________. However, _________________ of all species are ____________ by starvation, disease, competition and __________________.

What Darwin Thought A trait is a form of a genetically determined characteristic. _________________ _________________ is the human practice of breeding animals or plants that have certain desired traits. Example: Certain traits of __________ and _________ were bred into dogs needed for hunting as well as domestication. Darwin realized: any ________ can produce many _____________. However, _________________ of all species are ____________ by starvation, disease, competition and __________________.

What Darwin Thought A trait is a form of a genetically determined characteristic. Selective Breeding is the human practice of breeding animals or plants that have certain desired traits. Example: Certain traits of __________ and _________ were bred into dogs needed for hunting as well as domestication. Darwin realized: any ________ can produce many _____________. However, _________________ of all species are ____________ by starvation, disease, competition and __________________.

What Darwin Thought A trait is a form of a genetically determined characteristic. Selective Breeding is the human practice of breeding animals or plants that have certain desired traits. Example: Certain traits of tracking and small size were bred into dogs needed for hunting as well as domestication. Darwin realized: any ________ can produce many _____________. However, _________________ of all species are ____________ by starvation, disease, competition and __________________.

What Darwin Thought A trait is a form of a genetically determined characteristic. Selective Breeding is the human practice of breeding animals or plants that have certain desired traits. Example: Certain traits of tracking and small size were bred into dogs needed for hunting as well as domestication. Darwin realized: any species can produce many _____________. However, _________________ of all species are ____________ by starvation, disease, competition and __________________.

What Darwin Thought A trait is a form of a genetically determined characteristic. Selective Breeding is the human practice of breeding animals or plants that have certain desired traits. Example: Certain traits of tracking and small size were bred into dogs needed for hunting as well as domestication. Darwin realized: any species can produce many offspring. However, _________________ of all species are ____________ by starvation, disease, competition and __________________.

What Darwin Thought A trait is a form of a genetically determined characteristic. Selective Breeding is the human practice of breeding animals or plants that have certain desired traits. Example: Certain traits of tracking and small size were bred into dogs needed for hunting as well as domestication. Darwin realized: any species can produce many offspring. However, populations of all species are ____________ by starvation, disease, competition and __________________.

What Darwin Thought A trait is a form of a genetically determined characteristic. Selective Breeding is the human practice of breeding animals or plants that have certain desired traits. Example: Certain traits of tracking and small size were bred into dogs needed for hunting as well as domestication. Darwin realized: any species can produce many offspring. However, populations of all species are limited by starvation, disease, competition and predation.

Natural Selection Second example of the four steps: 1) A tarantula’s egg sac may hold _______________ eggs. Some will ____________ and some will not. 2) Each tarantula is ____________ but not identical to its parents. 3) Some tarantulas may be caught by __________, such as a wasp. Others may __________ or get disease. Only some will survive until ______________.

Natural Selection Second example of the four steps: 1) A tarantula’s egg sac may hold 500 – 1,000 eggs. Some will survive and some will not. 2) Each tarantula is ____________ but not identical to its parents. 3) Some tarantulas may be caught by __________, such as a wasp. Others may __________ or get disease. Only some will survive until ______________.

Natural Selection Second example of the four steps: 1) A tarantula’s egg sac may hold 500 – 1,000 eggs. Some will survive and some will not. 2) Each tarantula is similar but not identical to its parents. 3) Some tarantulas may be caught by __________, such as a wasp. Others may __________ or get disease. Only some will survive until ______________.

Natural Selection Second example of the four steps: 1) A tarantula’s egg sac may hold 500 – 1,000 eggs. Some will survive and some will not. 2) Each tarantula is similar but not identical to its parents. 3) Some tarantulas may be caught by predators, such as a wasp. Others may starve or get disease. Only some will survive until adulthood.

Natural Selection Second example of the four steps: 1) A tarantula’s egg sac may hold 500 – 1,000 eggs. Some will survive and some will not. 2) Each tarantula is similar but not identical to its parents. 3) Some tarantulas may be caught by predators, such as a wasp. Others may starve or get disease. Only some will survive until adulthood. 4) Successful reproduction means the tarantulas are best adapted to their environment and will have many scary spider babies.

Reading Check How does variation in a species happen? Many insects cannot live in cold environments because the temperature of an insect’s environment is directly related to its movement. But some bees have adapted to life in the arctic. Which of the following adaptations did these bees most likely develop in order to survive conditions in the arctic? A) An extra set of wings B) A sharper stinger C) Body hair D) More aggressive behavior

Reading Check How does variation in a species happen? This is due to the exchange of genetic info as it is passed from parent to offspring. Many insects cannot live in cold environments because the temperature of an insect’s environment is directly related to its movement. But some bees have adapted to life in the arctic. Which of the following adaptations did these bees most likely develop in order to survive conditions in the arctic? A) An extra set of wings B) A sharper stinger C) Body hair D) More aggressive behavior

Reading Check How does variation in a species happen? This is due to the exchange of genetic info as it is passed from parent to offspring. Many insects cannot live in cold environments because the temperature of an insect’s environment is directly related to its movement. But some bees have adapted to life in the arctic. Which of the following adaptations did these bees most likely develop in order to survive conditions in the arctic? A) An extra set of wings B) A sharper stinger C) Body hair D) More aggressive behavior