Evidence for Evolution
Preserved remains or traces of ancient organisms.
Fossils
This process occurs when organisms with helpful traits survive and reproduce more successfully.
Natural selection
When organisms with helpful traits survive and reproduce more often, their traits become more __________ in future generations.
Common
This practice occurs when farmers or breeders deliberately choose only the animals or plants with the best traits to mate over multiple generations.
Selective breeding (or artificial selection )
There are far more documented species of this tiny, crunchy, six-legged creature on Earth than there are species of mammals.
Insects
Whale embryos having tiny hind limb bones is evidence that whales evolved from these animals.
Land mammals
Random changes in DNA that can introduce new traits into a population.
Mutations
Brown moths became more common after pollution darkened the trees because they were better __________.
Camouflaged
This advanced laboratory process involves directly editing, cutting, or modifying the actual DNA molecules of a living organism.
Genetic engineering
The massive, sudden disappearance of entire groups of organisms (like trilobites or dinosaurs) from the rock record is known by this dramatic structural term.
Mass extinction
Rock layers deeper underground are usually this compared to upper layers.
Older
A population of rabbits contains white and brown fur colors. In a snowy environment, the rabbits with this fur color are more likely to survive.
White fur
The oldest organisms on Earth were mostly this type of organism.
Single-celled organisms
Human activities, such as building cities and introducing medicines, have had absolutely no effect on how other species evolve on Earth. True or False and explain.
False (Human activities heavily accelerate and alter the evolution of many species )
When looking at an evolutionary tree, two lines that split apart very close to the top indicate that those two species share a very recent one of these.
Common ancestor
Scientists compare embryos, fossils, and living organisms because they provide this.
Evidence for evolution
A trait that improves an organism’s chance of survival and reproduction is called this.
Adaptation
The current major increase in extinction rate caused by humans is called this.
The Sixth Extinction
Using antibiotics too often can cause bacteria to develop this ability, making infections harder to treat.
Antibiotic resistance
Describe one way humans influence evolution today.
Selective breeding, genetic engineering, habitat destruction, climate change, or antibiotic resistance
Name two types of evidence scientists use to support evolution.
Fossils, embryos, DNA, body structures, or living organisms
Explain why long-necked giraffes became more common over many generations.
Giraffes with longer necks survived and reproduced more successfully
A population of organisms is officially classified as a brand-new, distinct species when it reaches this biological milestone with the original population.
Speciation (or when they can no longer interbreed / successfully reproduce )
This specific, eco-friendly goal is why scientists use genetic engineering to modify plant DNA so that crops naturally protect themselves without using toxic chemical sprays.
Pest resistance (or insect resistance)
If a bodybuilder works out every day to develop giant muscles, this is the reason why their biological babies will not be born with giant muscles.
It is an acquired trait