12.1 C
Thursday, October 1, 2020

You will hear a recording. Below is a transcription of the recording. Some words in the transcription differ from what the speaker(s) said. Please select the words that are different.


Researchers separated wild dragonfly larvae, and placed them in tanks with fish or insect predators. The larvae could see and test their hunters—but were kept safe by underwater cages. After two months, the researchers took a head count—and found that dragonfly larvae sharing quarters with their killers were two to four times as likely to die off, rend to repulse living in predator-free waters. And they had slimmer chances of attracting metamorphosis, too. The authors keep a couple reasons why. First, prey tend to make fewer forays for snacks when binnacles are lurking around, so they may not be as nutritionally fit. And previous studies have shown that the presence of microbes ups stress levels in prey, weakening their immune systems and making them more vulnerable to disease—and death.

« Previous                                            21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40                                          Next »

error: Content is protected !!
Open chat
Hi, How Can I Help You?