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sladkih [1.3K]
1 year ago
13

To test how fertilizer affects aquatic animals, a student prepared four identical containers with water fleas. The student then

added different amounts of fertilizer mixed with distilled water to three of the containers and distilled water alone to one of the containers. What is the experimental group in this experiment?
A. All the water fleas in the container with the most fertilizer
B. The water fleas in the container with only distilled water
C. All the water fleas in all the containers
D. The water fleas in all the containers receiving fertilizer
Biology
2 answers:
artcher [175]1 year ago
7 0
The best answer is D..

It will help u
Naya [18.7K]1 year ago
4 0

D. The water fleas in all the containers receiving fertilizer


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You observed many sand hill cranes on your walk. Two sand hill cranes flapped their wings and hopped up and down when you walked
Anarel [89]

Answer:

This question lacks options, the options are:

A) symbiosis

B) ecosystem

C) community

D) population

E) biosphere

The answer is D) Population

Explanation:

Living organisms in an ecosystem are usually found in numbers living together in a given area. This is termed POPULATION in ecology. A population refers to the group of living organisms that belongs to the same species living together in the same habitat and have the ability to interbreed i.e. mate and reproduce with one another.

This is the case in this question where many sandhill cranes (large flying birds) were observed in a particular area, which represented their habitat. Asides the group of sandhill cranes living together, they were also observed to be interbreeding. This was evident in the observation of two sandhill cranes hopping up and down around their bright orange baby. This shows that members of the population are capable of mating and reproducing fertile offsprings.

This observation completes what a POPULATION is all about, hence, a population was observed.

5 0
1 year ago
Modify the existing vector's contents, by erasing the element at index 1 (initially 200), then inserting 100 and 102 in the show
Aleonysh [2.5K]

Answer:

Following are the code to this question:

#include <iostream>//defining header file

#include <vector>//defining header file

using namespace std;

void PrintVectors(vector<int> numsList)//defining a method PrintVectors that accept an array

{

   int j;//defining integer variable

   for (j = 0; j < numsList.size(); ++j)//defining for loop for print array value  

   {

       cout << numsList.at(j) << " ";//print array

   }

   cout << endl;

}

int main()//defining main method  

{

   vector<int> numsList;//defining array numsList

   numsList.push_back(101);//use push_back method to insert value in array

   numsList.push_back(200);//use push_back method to insert value in array

   numsList.push_back(103);//use push_back method to insert value in array

   numsList.erase(numsList.begin()+1);//use erase method to remove value from array

   numsList.insert(numsList.begin(), 100);//use insert method to add value in array

   numsList.insert(numsList.begin()+2, 102);//use insert method to add value in array

   PrintVectors(numsList);//use PrintVectors method print array value

   return 0;

}

Output:

100 101 102 103  

Explanation:

In the above-given code, inside the main method an integer array "numList" is defined, that use insert method to insert value and use the erase method to remove value from the array and at the last "PrintVectors" method is called that accepts a "numList" in its parameter. In the "PrintVectors" method, a for loop is declared, that prints the array values.

7 0
1 year ago
If 84 J of work are exerted to pull a wagon, how much force does it take to pull the wagon 7.0 m? Round your answer to the neare
nirvana33 [79]
Work is said to be done when an object moves due to a force applied. Work is calculated by multiplying the force applied and the distance traveled due to the force. It is expressed as:

W = Force x distance

W = 84 J = F (7.0 m)
F = 12 N

Hope this answers the question.
6 0
2 years ago
Read 2 more answers
Which data are MOST useful for analyzing the climate of the region?
Kipish [7]

Answer:

The correct answer is - option D.

Explanation:

According to some scientists, a climate of a region is an average of the weather for a specific region for a particular period, which is more often 30 years or over.

SO, according to the options and the given information above, the measuring average temperature for 30 years of the month of July is most helpful in analyzing the climate of a specific region.

3 0
1 year ago
Use the drop-down menus to identify the organelles labeled on the animal cell to the right.
geniusboy [140]

The label A represents mitochondria.

The mitochondria is also called the powerhouse of the cell which converts glucose to energy rich molecules of ATP.

Label B represents nucleus.

Nucleus contains the genetic material or DNA, RNA , nucleolus, chromatin fibres and proteins. It contains the chromosomes which control the hereditary characteristics.

Label C represents lysosome.

Lysosomes contain digestive juices which breaks down large cell parts and large molecules and helps in intracellular digestion.

Label D represents rough endoplasmic reticulum having ribosomes.

The rough endoplasmic reticulum provides surface for protein synthesis. It is also used to transport cellular contents from one cell to another.

4 0
1 year ago
Read 2 more answers
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