Scientific Insights into Behavior and Evolution

Impact of Television on Child Development

F: Experts say that ADD involves an over-stimulation of young developing brains.

F: This new study tested the idea that television watching by very young children is linked to attention problems by the age of seven.

?: The new study simply talks about attention problems, but it seems to imply that watching too much television can make children more restless and unable to concentrate or even listen attentively for a long period of time. In addition, children may become too aggressive. ?: For some time, researchers have considered that watching too much television can result in children getting fat or aggressive, and there are also other studies that proved that watching television at an early age can cause attention problems at school.

• a) Amount
• b) Signs
• c) Tested
• d) Earlier

• a) Began—between
• b) Often—a
• c) On—is
• d) What she would do when she finished her homework

Genetic Differences Between Humans and Chimpanzees

F: This similarity has led chimp expert Dr. Jane Goodall to call for human rights to be extended to chimpanzees.

F: Development and destruction of their natural habitats, along with commercial hunting for food, have cut their numbers from two million chimpanzees at the turn of the last century to less than one-tenth of that now.

?: A fossil skull has been found this year that may prove that humans and chimpanzees are the only survivors of a great diversity of ape-like, human-like creatures that lived more than five million years ago. This discovery and the fact that only 2% of our genes separate us from the chimpanzee prove that humans and monkeys have common ancestors.

?: The most important difference has been the development of language in humans that has had important consequences in our lifestyle.

• a) Link
• b) Which encloses the brain
• c) Leap forward
• d) Seemingly

• a) You don't ask him a question, he won't speak to you.
• b) I had to do it at once.
• c) Difficult for us to do
• d) Is being investigated by some

South American Wild Cats Find Hope in a Test Tube

T: Since time immemorial, felines have been venerated in America, North and South.

F: So far, the problem has been addressed by introducing new animals into each region...

?: The number of felines has decreased because human activities such as mining or hunting have reduced their natural habitat in the forest, and this implies the reduction of the feline population. ?: Scientists from these two countries will use assisted reproduction techniques; that is, they will create two genetic banks from which female animals will be fertilized with semen from males.

• a) Declined
• b) Threat
• c) Farming
• d) So far

• a) To—should
• b) Had—carelessly
• c) Too—for
• d) Researchers when they had begun their new wild cat project.