All categories

3 years ago

How did the lab activities help you answer the lesson

Biology

2 answers:

zmey [24]3 years ago

8 0

Answer:

The relative method for dating the age of rocks and fossils helps to date the rocks and fossils by determining the approximate age for the fossil or rock by comparing it to something whose age is already known like similar rocks and fossils. In fact, there are certain rocks and fossils which serve as index fossils for comparison.

Absolute dating method tends to determine a precise age of rocks and fossils by radiometric dating of the isotopes of the rocks and fossils.

azamat3 years ago

3 0

<h2>Sample Response: </h2>

In the lab, I used the law of superposition, the principle of cross-cutting relationships, and index fossils to determine the relative ages of rock layers. Then, I used a mass spectrometer to find the age and identity of an unknown fossil. I learned that radioactive decay can help scientists figure out the age of rocks and minerals. I also learned that dating rock layers and the geologic time scale can help us understand Earth’s history by identifying what was happening to Earth and what lived on Earth when the rock layers were formed.

From Edg 2020

You might be interested in

There are 25 individuals in population 1, all with genotype AA, and there are 40 individuals in population 2, all with genotype

german

Answer:

a. Genetic drift

Explanation:

When there is a change in the frequency of genes in a small population due to chance event as a result of which a few alleles disappear from the population, is known as genetic drift.
In the given situation, the population size is small i.e. 25 and 40 respectively and in both these populations, it can be seen that one of the population only has allele A whereas the other has allele a, and because of this it can be concluded that this situation must have arisen due to genetic drift.
The populations got established due to random sampling and then the progenies inherited only the alleles of the organism that reproduced and thus, the frequency of the other allele decreased and this is merely a chance event.

8 0

3 years ago

What is the relationship between your digestive system, stomach and intestines?

jolli1 [7]

The digestive system is an organ system. The stomach and the intestines are parts of the digestive system. The digestive system is an organ system. The stomach and the intestines are parts of the digestive system. Was this answer useful?

6 0

4 years ago

Hi does the calcuim effect your body

Pachacha [2.7K]

Hello! Calcium is good for your body. You can find a good source of calcium in milk. :) Hope this has helped.

7 0

3 years ago

Read 2 more answers

In order to feed the growing population, scientists have found ways to increase the yield of a crop. What does the term yield me

leonid [27]

The correct answer was

Amount of food produced in an area.

____________________________________________________

100% correct Answers

Question 1

Which kind of organism obtains energy only from producers?

herbivores

Question 2

Which of the following best describes a population?

members of the same species living in the same place at the same time

Question 3

Which of the following describes soil and temperature in an ecosystem?

abiotic factors

Question 4

A forest fire wipes out all of the plant life in an area, causing the animals to leave. The ground becomes a mixture of soil and ashes. Which order of succession is most likely to occur in the area?

grasses → shrubs → softwood trees → hardwood trees

Question 5

After a town is abandoned, the concrete parking lots remain empty and inactive for hundreds of years. What is the most likely order of ecological succession in that area?

lichens → grass → shrubs → trees

Question 6

The graphs show the trends in biodiversity of land-based life and marine-based life. Choose the answer that best fits the graph.

the sustainability of ecosystems is decreasing regardless of protected areas.

Question 7

Read the passage "Easter Island Palm." Choose the answer below that best fits the problem on Easter Island.

EASTER ISLAND PALM

In the 1400s, the Easter Island palm became extinct due to overharvesting. Reproduction was nearly impossible because islanders introduced rats when they first arrived. These rats ate the Easter Island palm seeds, preventing the Easter Island palm from flourishing. With the disappearance of the palm, the islanders could no longer build the boats they needed for fishing.

a decrease in the temperature, leading to decreased biodiversity

Question 8

The primary reason that the human population has grown rapidly over the past 100 years is that there has been

an increase in food supplies and better access to clean water.

Question 9

Which of the following would cause a decrease in a population's size?

emigration

Question 10

Decisions made by the current generation

can open or limit possibilities of future generations.

Question 11

In order to feed the growing population, scientists have found ways to increase the yield of a crop. What does the term yield mean?

Amount of food produced in an area.

Question 12

Which factor can cause secondary succession?

clear cutting

Question 13

What is the role of a pioneer species in primary succession?

to create the soil

Question 14

The number of rhinoceroses has decreased to near extinction. How are rhinoceroses classified under the Endangered Species Act?

endangered

Question 15

Lions live in groups called prides. Lion populations would most likely fall in which category of population distribution?

clumped

4 0

4 years ago

does the process of fossilization still occur today or was it limited to earths geologic past? explain

yarga [219]

I believe the process of fossilization still occurs today. The reason being why we find fossils is because of the overlaying of earth's substances over the fossil, and with the right combination, lead to fossils. It would still occur today, let's say you've buried a dog, and over time water, smelted rock, and a few other earth materials came over the dead dog's body. It would most likely be fossilized at the end of this process, but it would take years for it to happen. Fossilization does not happen in one day.

7 0

4 years ago