Answer:
Every fossil tells us something about the age of the rock it's found in, and index fossils are the ones that tell us the most. Index fossils (also called key fossils or type fossils) are those that are used to define periods of geologic time
Explanation:
Answer:
Charles Ehler: incorrect.
Wendell Mullison: correct.
Robert Rodriguez: correct.
Judy Johnson:correct.
Explanation:
-Charles Ehler´s statement is incorrect because in order for a chemical company launch a new product it must pass several tests, that´s why products lasts years in proves, there are several tests such as the environment test that proves that the product doesn´t affect other species, or the human safety that makes sure the product doesn´t affect human health.Wendell Mulison´s statement proves to be correct with this as well.
-Robert Rodriguez´s statement is correct because even though there are several tests that take care human healt there are just a few based on the damage pesticides produce to the land where are used.
-Judy Johnson´s statement is correct because science has proved that the resistant of parasites as being increasing with the products tat are used to combat them. Bacterias are an example of it, many drugs used against bacterias are now useless for some people because of the resistantthey have developed.
-One specie that can be taken as a pesticide can be the ground snail, that affects some plants and also may contain a parasite aclled "Hepatic fasciola" that affects sheeps and goats of farmers.
-One viable method to control pesticides is the sue of other species to control them, this specie has to be adequate to the land, for example, if a farmer wants to get rid of the ground snails because of the parasite and the damage they do to their platings, they can introduce ducks to the farm that eat them without damaging the land with any kind of chemical product.
Answer:
effector
Explanation:If the value is not at the set point or is outside the normal range, the control center sends a signal to the effector. The effector is an organ, gland, muscle, or other structure that acts on the signal from the control center to move the variable back toward the set point.
Answer:
yes it is in high risk of extinction
Explanation:
yes it is in high risk of extinction
Answer:
fern is the producer.
Explanation:
producers are mainly green plants.
