TYRANNOSAURUS (One of the extinct animals which lived on the
Earth about 100,000,000 years ago)
Tyrannosaurus was about six metres long and it
preyed upon other animals. What do you think
about its classification-was it an amphibian reptile or a mammal ?
Can you
call it a relative of Kangaroo ?
Yes/No
Give reason

Asquirrel population lives in an area. over many years, a river in that area grows wider and stronger, eventually forming a canyon. the squirrel populations on the two sides of the canyon can no longer mate with each other and ultimately form distinct species. this is an example of

19. a cell is viewed under a microscope and is found to have two nuclear envelopes and spindles that appear to be breaking apart. which phase of mitosis is the cell most likely in? a. metaphase b. prophase c. telophase d. anaphase

Which of the following best describes the purpose of the parathyroid hormone? a. it decreases the blood calcium level and decreases blood phosphorus level. b. it decreases the blood calcium level and increases the blood phosphorus level. c. it increases the blood calcium level and increases blood phosphorus level. d. it increases the blood calcium level and decreases blood phosphorus level.