Have any species (with the exceptions of humans) been observed to kill themselves purposefully?

What happened to rosalind franklin in 1956?

According to your text, should be in the native language of the parents or guardians whenever possible. a. an email b. consent forms c. oral approval d. storybooks loaned out

When an object is moving away from you while still making a sound, the pitch of the sound is perceived to a. lower b. unchanged c. fluctuating d. higher