The answer is C: Gene
b. physical model
c. computer model
d. none of the above
Answer: Option A Idea model
Explanation:
(1) Most of the species that have lived on Earth
no longer exist.
(2) Most of the species that have lived on Earth
still exist today.
(3) Fossils of species that never existed can be
found.
(4) Fossils of species that never existed, but will
exist in the future, can be found.
Answer:
(1) Most of the species that have lived on Earth no longer exist.
Explanation:
Fossil describes the remnant or trace of animals or plants in a geologic age that is preserved in the Earth's crust. It can be studied to give a fossil record, which is an evidence of past existence of a plant or an animal.
Fossil record is the history of life of an organisms documented by fossil that has been preserved in rocks. It helps paleontologists, archaeologists, and geologists to make accurate predictions about events and species.
Scientists believe that almost 99.9% of species of different organisms that have lived on Earth are now extinct. Therefore according to fossil record, most of the species that have lived on Earth no longer exist.
Answer: 256.2 m/s (meters per second)
Explanation: Distance covered is 12450km and time used is 13.5hours. We first convert these values to standard units for distance (meters) and time (seconds).
12450 km = 12450 x 1000 m = 12,450,000 m
13.5hours = 13.5 x 60 x 60 = 48,600s
Average speed =
The average speed of the jet is 256.2m/s