1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Lady_Fox [76]
3 years ago
13

Science help

Biology
2 answers:
Thepotemich [5.8K]3 years ago
7 0
The answer for the first one is c. That's all I know.
never [62]3 years ago
5 0
<h2>Answer to Q1:</h2>

(d) by finding the absolute age of the rock

<h2>Explanation:</h2>

The relative age of a rock is not an exact number or age; rather it's the comparison of one rock or fossil to another to determine which one is older or younger. Scientists use carbon dating to calculate the age of a rock. Organic material from the rock is tested and that information is used to calculate the estimated age.


<h2> Answer to Q2:</h2>

C) Rock layers

<h2>Explanation:</h2>

The Fossil Record and Geologic Time Fossils of plants and animals are present in some rocks. These fossils contribute to our understanding of geologic time and they show us the time span when and how a civilization used to live.

<h2>Answer to Q3:</h2>

(c) They get a sense of the history of the area they are investigating.

<h2>Explanation:</h2>

Fossils scaled into rocks are fundamental to the geologic time scale. For instance rocks formed during the Proterozoic Eon may have fossils of relative simple organisms, such as bacteria, algae, and wormlike animals while Rocks formed during the Phanerozoic Eon may have fossils of complex animals and plants such as dinosaurs, mammals, and trees.  

<h2>Answer to Q4:</h2>

(a)the appearance and disappearance of groups of organisms

<h2>Explanation:</h2>

the appearance and disappearance of groups of organisms in different geological eras of earth history shows the time span of that era. This time span can be easily determined from the fossils present on sedimentary rocks because they show the family or group of those species which were present in that particular time period.

<h2> Answer to Q5:</h2>

(d)radioactive dating

<h2>Explanation:</h2>

Scientists use radioactivity techniques to determine the age of earth. As we know radioactive substances emit energy continuously and they have a certain half life period so calculating the half life period can show us the age of earth by comparing the half lives of different radioactive elements. For example in uranium-lead dating, for instance, the radioactive decay of uranium into lead proceeds at a reliable rate.

<h2>Answer to Q6:</h2>

(c)Sedimentary

<h2>Explanation:</h2>

Mostly sedimentary rocks like limestone and shale are the best options in the formation of fossils. Igneous rocks are formed directly from hot lava that is why they would not be able to preserve any remnants of living organisms that fall in it during its formation.

<h2>Answer to Q7:</h2>

The granite is older than the sandstone.

<h2>Explanation:</h2>

The principle of inclusions states that with sedimentary rocks, if inclusions  are found in a formation, then the inclusions must be older than the formation that contains them. So in simple words pieces of the older rock will be included in the younger rock therefore option B is the correct answer.


You might be interested in
A pex<br><br><br><br><br><br><br><br>need help asap!​
Anit [1.1K]

Answer:

C. Deep, dark seawater

Explanation:

took the test

u got trolled :b

6 0
2 years ago
Which of the following mutations could lead to constitutive expression of the genes of the lac operon? View Available Hint(s) Wh
Molodets [167]

Options for part A are as follows:

A) A mutation in the operator sequence

B) A mutation in the lac-Z gene

C) A mutation in the lac-Y gene

D) A super repressor mutation

Answer:

The correct answer:

Part a - A mutation in the operator sequence

Part b - It ensures that a cell dedicates resources to the production of enzymes involved in lactose metabolism only when lactose is available in the environment

Part C. true.

Explanation:

part a:

If there is a mutation in the operator sequence leads to prevent binding of the repressor which leads to allowing constitutive expression of the genes various conditions.

part b:

The biological role of the lac operon makes sure that the cell dedicates resources to the production of enzymes involved in lactose metabolism only when lactose is available in the environment

Part c:

RNA polymerase cannot transcribe the structural genes due to the repressor binds to the lac operator, therefore, the proper function of the lac operon is possible when the placement of the operator sequence between the promotor and the structural genes.

4 0
2 years ago
What is erythrocytopenia?​
USPshnik [31]

Answer:

Medical Definition of erythrocytopenia

: deficiency of red blood cells. — called also erythropenia.

Explanation:

If you like my answer than please mark me brainliest thanks

8 0
3 years ago
Which of the following is NOT a nucleic acid ?
34kurt

Answer:

reverse transcriptase

Explanation:

3 0
2 years ago
Read 2 more answers
Determine whether each phrase describes a community, ecosystem, habitat, or population.
Yuri [45]

Answer:

A herd of bison - population

Frogs, insects, and birds living near a pond - community

The plants, animals, water, and soil of a forest - ecosystem

The kelp forest where sea otters live - habitat

All the hummingbirds that live in your state - population

Fish, eels, and lobsters living in a coral reef - community

A dying tree with holes that animals live in - habitat

Wetland plants, animals, and marshes - ecosystem

Explanation:

In ecology, the interaction of organisms are classified into categories including population, community, ecosystem etc.

A population in ecology consists of all the members of a particular species that inhabits a particular location. Based on the wide range of examples given in the question, a herd of bison and all the hummingbirds living in my state are examples of a population because they consists of organims of same species (bison and hummingbirds) living in a particular habitat.

A community, as opposed to population consists of organims of different species that share the same location as habitat. According to the question, Frogs, insects, and birds living near a pond and Fish, eels, and lobsters living in a coral reef are examples that represents a community because they contain organims of different species found living in a common habitat.

An ecosystem is the interaction between the biotic components (living) of a community with one another and also with the abiotic components (non-living). Based on the question, The plants, animals, water, and soil of a forest and Wetland plants, animals, and marshes represents an example of ecosystem because they contain living and non-living components interacting together. The living components in the first and second examples are plants, animals while abiotic components are water, soil and marsh.

Habitat refers to the physical location where the population or community of organisms lives. In this question, the kelp forest where sea otters live and a dying tree with holes that animals live in describes habitats of organisms.

5 0
3 years ago
Other questions:
  • How long can a praying mantis live without its head?
    12·1 answer
  • Explain why this feedback loop does not apply to a person with untreated diabetes.
    11·1 answer
  • In humans, the allele for brown eyes is dominant to the allele for blue eyes. If a man with blue eyes and a woman with brown eye
    11·2 answers
  • A self-assessment identifies your skills and interests for the purpose of______planning
    10·1 answer
  • Identify the trend common to both the 15-day-old and 1-month-old guinea pigs' red blood cells. identify the trend common to both
    13·1 answer
  • Does the skin assist in movement of humans? And if so how?
    10·2 answers
  • Help this is very confusing :C
    8·2 answers
  • Why are melting glaciers dangerous for humans
    15·2 answers
  • Answer quickly please
    7·1 answer
  • Which is most responsible for the synchronized contraction of cardiac muscle tissue?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!