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
Aleksandr [31]
3 years ago
14

researchers conducted an experiment to identify the effects of three different hand sanitizer on the growth of bacteria the rese

archers grew one type of bacteria and 24 identical covered Petri dishes then they open 18 Petri dishes and applied for three hand sanitizers to six Petri dishes Beach they left the remaining six Petri dishes closed as a control when the researchers measure the growth of bacteria 2 Days Later the six dishes that had no hand sanitizer showed the least amount of bacterial growth the researchers concluded that not using any hand sanitizer would lead to the least bacterial growth which statement best explains why the researchers conclusions were not justified
Biology
1 answer:
lesya692 [45]3 years ago
7 0
Your question is rather unclear but from what I can tell either there were not an even amount of Petri dishes or some of them were left open while others were not.
You might be interested in
The carrying capacity is
nika2105 [10]

Answer:

2

Explanation:

i guessed

4 0
3 years ago
BRAINLIEST!! ASAP<br>Normal rain has a pH of about (?).<br>8.4<br>4.0<br>5.6<br>7.0
Aleksandr-060686 [28]

Normal, clean rain has a pH value of between 5.0 and 5.5, which is slightly acidic. However, when rain combines with sulfur dioxide or nitrogen oxides—produced from power plants and automobiles—the rain becomes much more acidic. Typical acid rain has a pH value of 4.0.

8 0
3 years ago
Read 2 more answers
Give the role of air in an ecosystem
Radda [10]

Sustain Life and Growth

Air consists one of the main life-sustaining gas called oxygen. Almost all living things breathe in and breathe out this air. Nitrogen and Carbon dioxide are also other gases that are vital for plants and their growth.

Combustion

Apart from this, air supports burning or combustion. The oxygen present in air help in burning of the fuels to basically carry out activities like cooking food, running industries and vehicles as well as generating heat and electricity.

Temperature Control

Another important aspect of air is that it helps in maintaining the temperature on the earth surface by circulating hot and cold air. Air acts as a conductor of heat as well. Even phenomena such as water cycle are dependent on air.

Supplier of Energy

Air which consists of energy is one of the main suppliers of energy. Living things are made up of cells and these cells extract oxygen within the blood to produce energy usually in the form of ATP. This biochemical generation of ATP is essential to maintain life on the earth.

Photosynthesis

Carbon dioxide, which is a component of air is used by plants during the process of photosynthesis. Here oxygen is also released by plants. And we already know how vital oxygen is.

3 0
2 years ago
Read 2 more answers
Eukaryotic cells that are destined to divide progress through G1, S, G2, and M phases, which are collectively known as the
julia-pushkina [17]

didnt understand the question, but the answer i think would be

The eukariotic cell cycle

3 0
2 years ago
Which element of a desert biome is abiotic?<br> cactus<br> fungi<br> lizard<br> sand
emmainna [20.7K]

Answer:

1. THE DESERTS -DEFINITION. -FEATURES. -BIOTIC AND ABIOTIC FACTORS THAT INFLUENCE DESERT BIOME. -MOST REPRESENTATIVE DESIERTS IN OUR PERU. DELGADO ENVIRONMENT ELERA, REYNER San José de Moro, September 2014

2. DESERT  A desert is an area of ​​the earth's surface totally or almost totally uninhabited.  A desert can be a sandy or stony terrain that lacks vegetation due to low rainfall.  The harsh environmental conditions mean that these deserts have little stable population DELGADO ELERA, REYNER. CHARACTERISTICS OF THE DESERTS.  Temperatures are generally high, but nights can be cold.  Its climate is extreme with temperatures of 50 ° C during the day and –20 ° C at night.  It is the ecosystem that presents water scarcity.  The ground is covered with sand as a result of the disintegration of rocks. The relief presents plains, dunes and in some places oases.  There are counter winds and rains are very scarce.  Deserts form the largest area of ​​the earth's surface. BIOTIC AND ABIOTIC FACTORS THAT INFLUENCE DESERT BIOMA  BIOTIC FACTORS THAT INFLUENCE DESERT BIOME These are the living beings of an ecosystem that survive. They can refer to the flora, fauna, humans of a place and their interactions. Individuals must have specific behavior and physiological characteristics that allow their survival and reproduction in a defined environment. The condition of sharing an environment engenders a competition between species, given by food, space, etc. Depending on the region: In the desert only some animals manage to survive: camels, lizards, spiders, owls, rats, kangaroo, mice, a variety of snakes, hawks, scorpions, birds, squirrels among others. In the same way, in the fauna, only some plants manage to survive. These protect themselves from other animals with the thorns they have and with their thick layer of skin, some of them are: cactus, palm trees, nopales, bushes, grasslands, weeds in oases, etc.

3. Plants and animals that live in the desert are conditioned to withstand extreme temperatures with minimal water.  ABIOTIC FACTORS THAT INFLUENCE DESERT BIOME Abiotic means lifeless. They are the different components that determine the physical space in which living beings inhabit; among the most important we can find water, temperature, light, soil, humidity, air and nutrients. They are the lifeless factors. Deserts are known for their extreme abiotic factors. Varied temperature and scarce fluvial precipitation. Sunlight, climatic factors such as: humidity (very low) and temperature (high during the day, very low at night); rocks, sand or very dry soil, atmospheric gases, very strong barometric pressure. Rocky terrain, wind processes are important factors in the formation of the landscape. They have an average rainfall of 200 to 500 mm per year. MOST REPRESENTATIVE DESERTS OF PERU 1. DESERT OF SECHURA  One of the most representative deserts of Peru is that of Sechura, located in the northwest of Peru, just between the Lambayeque and Piura regions having a length of 150 kilometers by a width of 100. It is located 55 km southwest of the city of Piura. It is the widest area of ​​the coastal desert in Peru, it has an area of ​​more than 5000 square km.  This desert is an arid plateau formed by materials from the Tertiary, with little vegetation, which includes several intermittent lagoons. The aridity of the climate and the unproductive soils limit the settlement of the population, except in the oases that constitute the mouths of the Piura rivers, to the north, and Lambayeque, to the south; agriculture is possible in these areas. DELGADO ELERA, REYNER

Explanation:

4 0
3 years ago
Read 2 more answers
Other questions:
  • The nurse is working in an antenatal clinic. what findings would the nurse report to the provider during the third trimester of
    13·1 answer
  • What is the impact of disease on the environment?
    5·1 answer
  • If having an XX genotype means you will have purple eyes, what is the probability that a child from these parents will have purp
    6·1 answer
  • People with lactose intolerance should still eat dairy products.
    14·1 answer
  • If an individual is a carrier of an infectious disease, he is __________. if an individual is a carrier of an infectious disease
    5·1 answer
  • Claire deposited $2,500 into an account that accrues interest monthly. She made no additional deposits or withdrawals. After 2 y
    14·2 answers
  • What does a person’s blood type tell you about blood and proteins?
    8·1 answer
  • Indicate whether the following statements are true or false.
    12·1 answer
  • 18. Why does DNA Replication have to happen at this stage of the cell<br> cycle? *
    12·1 answer
  • What is photosynthesis? where does it take place in a plant and what products are produced as a result?
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!