3What’s the difference between an inherited and acquired trait? A trait is …a distinct characteristic (hair color, height, etc.) of an organism that may be inherited or acquired.What’s the difference between an inherited and acquired trait?
4Acquired Trait …A characteristic that is learned or obtained through experience. It is not passed on to offspring.
13Fission – the parent splits into two or more identical organisms. Examples
14Fragmentation/regeneration – the parent breaks into different fragments and each grow into a new organism.Examples
15Reproduction with two parents – a male and female. Sexual ReproductionReproduction with two parents – a male and female.
16The female produces an egg. The male produces sperm.
17When the egg & sperm unite, offspring are produced. Offspring are similar to, but different, from the parents.
18Half of the genetic material comes from each parent.
19Don’t have to find a partner Don’t have to raise offspring Asexual ReproductionAdvantagesDisadvantagesFastEasyDon’t have to find a partnerDon’t have to travelLess can go wrongDon’t have to raise offspringNo variety
20Time raising offspring Sexual ReproductionAdvantagesDisadvantagesVarietySlowComplexHave to have a partnerMay have to travelMuch can go wrongTime raising offspring
21They are responsible for survival in an environment. Now we know about traits, what do they do for us?They are responsible for survival in an environment.
22Traits help an organism adapt to its environment. Adaptations - Characteristics that give an organism a better chance of survival.
23There are two types of adaptations. The first type is structural adaptations.These are the inherited traits.
24The second type is behavioral adaptations. These are the acquired traits.
25Structural traits help an organism survive in certain environments.
26Bird beaks are great examples of adaptations. FoodCrackerSeed eater. The bill is strong and used to crack open seeds.
27BeakFoodTweezersInsect eater. They are used to pick insects off leaves, twigs, and bark.ChiselInsect eater. Chisel is used to get insects under bark.NeedleNectar eater. Uses needle beak to get into flowers to get the nectar.HookMeat eater. Used to bite the skull or neck; tears the body into pieces small enough to swallow.
28When is a trait a disadvantage? When the environment changes.
29Look at bird beaks again. What’s a seed eater to do if the seeds are gone?The beak is so strong it will smash insects & fruits.
30What good is white fur if it never snows? Webbed feet are not that helpful on the land.
31What are some unique adaptations & traits? How about mimicry? (resemblance of a species to another species or natural objects; provides concealment and protection from predators).
32The Monarch and Viceroy The monarch is a bitter-tasting butterfly.The viceroy mimics the monarch.
33The Honey Bee and Syrphid Fly The honey bee has a nasty sting predators avoid.The syrphid fly mimics the honey bee.
34The Coral & Scarlet King Snakes The coral snake is poisonous.The scarlet king snake mimics the coral snake."Red on yellow, kill a fellow. Red on black, won't hurt Jack."
35The Orchid and the Mantid The orchid attracts insects for pollination.The orchid mantid mimics the orchid in order to catch prey.
36We can selectively choose traits for plants and animals.
37The original corn was tough and had little taste. We have selectively chosen corn traits; our corn is now soft and sweet.
38Through selective breeding, cows give more milk than in the past. 100 years ago, cows gave less milk than they do today.Through selective breeding, cows give more milk than in the past.
39Dogs have been selectively bred for desired traits. ?
40Body structure is also adapted to a specific environment.
41Birds have hollow bones and other specialized bones to aid flight.
42Hair and blubber insults the body. The otter’s hair concentration is between 170,000 – 1,062,000 per square inch.