Fossils provide solid evidence that organisms from the past are not the same as those found today; fossils show a progression of evolution. Fossils, along with the comparative anatomy of present-day organisms, constitute the morphological, or anatomical, record. By comparing the anatomies of both modern and extinct species, paleontologists can infer the lineages of those species. This approach is most successful for organisms that had hard body parts, such as shells, bones or teeth. The resulting fossil record tells the story of the past and shows the evolution of form over millions of years.
Answer:
From largest to smallest they are: Universe, galaxy, solar system, star, planet, moon and asteroid.
Answer:
It decreases
Explanation:
The sun provides energy for plants to grow and then animals eat the plants and humans eat animals throughout the transfer of energy through digestion energy is lost via digestion and excretion.
Answer:
The correct option is : d. Syncytia
Explanation:
Syncytia are the multinucleated cells formed from multiple fusions of the uninuclear cells.
During a infection, an infected cell fuse together with the neighboring host cells, leading to the formation of large multinucleated cells, called syncytia.
Viruses like herpesviruses, induce the formation of multinucleated syncytia cells.
Answer:
Pyrogens are substances which, when injected into the mammalian body, will cause a variety of symptoms, the most recognisable of which is an increase in core body temperature.
Explanation:
The body is able to regulate temperature in response to signals from the nervous system. When bacteria are destroyed by leuckocytes, pyrogens are released into the blood. Pyrogens reset the body's thermostat to a higher temperature, resulting in fever.
