Answer:
B.
Explanation:
Air takes up space it is just super light therefore it is matter
:)
define each characteristic of life
Answer:
All living organisms share several key characteristics or functions: order, sensitivity or response to the environment, reproduction, growth and development, regulation, homeostasis, and energy processing. When viewed together, these characteristics serve to define life.
3. A survey of animal life in a pond suggests that a native fish species no longer
inhabits the pond. The biologist leading the survey hypothesizes that the pond has
been made more acidic by acid precipitation. She thinks that this acidity has made
the pond uninhabitable by this fish species. The biologist has enlisted a chemist to
help her analyze the situation and decide whether her hypothesis is supportable
a. What is the first chemical test the chemist should perform to help the biologist
test her hypothesis? (0.5 point)
Think about the biologist's assertions about a change in the pond water
acid test
Explanation:
the first test the chemist should do is an acid test
What characteristics of the plant make it a living thing?
advantages and disadvantages of performance enhancing drugs and athletes
Which statement describes how the water molecule
forms?
Answer:
H↓²O
Explanation:
A water molecule consists of one oxygen atom bonded to two hydrogen atoms by covalent bonds....
please put in order from smallest to largest (PLEASE HELP IM CRYING!!!!)
Gerald is studying the plants and animals of a meadow. He classifies the grasses and clover as autotrophs or producers. Give two pieces of evidence to support Gerald’s classification.
Answer:
First evidence is both are plants.
Second evidence is both uses sunlight.
Explanation:
Grasses and clover are autotroph and can be classified as producer because they has the ability to produce their own food from the process of photosynthesis. Gerald’s classification is right because grasses and clover are plants and we know that plants are the producer of the ecosystem. We can also see that plant is the only organism which uses sun as a source of energy from which it produce their own food.
A certain toxin prevents the mitochondria from functioning properly. Describe the immediate effect this toxin would have on a cell.
Answer:
The cell can't perform its activities.
Explanation:
The immediate effect of this toxin, the cell is greatly affected because mitochondria is the powerhouse of the cell which provide energy in the form of adenine tri phosphate (ATP) by the breaking down of the glucose molecule. If mitochondria does not function properly so there is no energy for the cell and the cell can't perform its activities and our body muscles will be weaker and tired very fast.
If a certain toxin prevents the mitochondria from functioning properly, then the cell won't be able to create energy in the form of ATP. Cellular respiration occurs in the mitochondria.
Mitochondria are the energy centers of the eukaryotic cells where ATP (the energy coin of the cell) is synthesized.Cellular respiration is a series of metabolic reactions by which cells produce energy in the form of ATP from energy from foods and oxygen.This process (cellular respiration) has three stages: glycolysis, the Krebs cycle and oxidative phosphorylation.Glycolysis occurs in the cytoplasm, whereas the Krebs cycle and oxidative phosphorylation occur in the mitochondria.In conclusion, if a certain toxin prevents the mitochondria from functioning properly, then the cell won't be able to create energy in the form of ATP.
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functions of the circulatory, respiratory, digestive, and endocrine systems?
The Circulatory System is about the Blood and the heart: they deliver oxygen to the rest of the body (except lungs). AFTER they deliver the oxygen they get the waste (Carbon Dioxide) and deliver it to the LUNGs (Respiratory System)
The Respiratory system is about the Lungs, Bronchi, Alveoli, Trachea, etc. They EXCHANGE the carbon dioxide from the blood with oxygen, they do this in the ALVEOLI (a small, grape-like sockets in the lungs).
The Digestive System consist the Esophagus, Stomach, Intestines, Gallbladder, and Anus. They Digest the food, they ABSORB the nutrients from the food we eat and we poop out the UNNECESSARY wastes.
Organelles such as mitochondria and chloroplasts are hypothesized to have originated by _______, by which larger cells engulfed smaller cells.
Answer:
Endosymbiosis
Explanation:
Organelles such as mitochondria and chloroplasts are hypothesized to have originated by Endosymbiosis , by which larger cells engulfed smaller cells.
The endosymbiosis theory is a biological theory of evolution which states that eukaryotic cells were formed from prokaryotic organisms.
Some students believe that if they drink a glass of milk before bed and would make them sleep longer what’s the independent variable dependent variable and a control variables
Answer:
Independent variable: Glass of milk
Dependent variable: Time of sleep
Control variable: same type of milk
Explanation:
Independent variable in an experiment refers to the variable that the experimenter manipulates or changes in order to get a response in another variable (dependent). In this case, the independent variable is the GLASS OF MILK taken before bed.
Dependent variable is that variable that is measured in an experiment. It is the variable that responds to the changes made to the independent variable. In this experiment, the dependent variable is the TIME OF SLEEP of the students.
A control variable or constant is the variable that is kept unchanged throughout the course of the experiment in order not to alter the outcome of the experiment. In this experiment, a control variable can be the SAME TYPE OF MILK taken by each student.
O hipotálamo produz 2 hormônios: ocitocina, que estimula a contração do útero no parto e estimula a liberação do leite marterno; e prolactina, responsável pela produção do leite materno
Answer:
O hipotálamo produz 2 hormônios: ocitocina, que estimula a contração do útero no parto e estimula a liberação do leite marterno; e prolactina, responsável pela produção do leite materno
Explanation:
O leite materno é considerado o melhor alimento para o bebê, por isso é necessário cumprir a amamentação obrigatória nos primeiros seis meses de vida do bebê no caso de ter leite.
As mães que faltam ao leite materno é porque há uma inibição desse eixo entre o hipotálamo, o útero e as glândulas mamárias, os hormônios não são secretados, portanto o órgão alvo não os percebe através de seu receptor e não tem um produto metabólico.
Por outro lado, a ocitocina é um hormônio que promove a contração muscular do útero, gerando trabalho de parto para a expulsão do bebê pelo canal vasginal, essas contrações para iniciar o trabalho de parto devem ser a cada cinco minutos e intensidade Alto.
According to the scientific theory of how the universe was formed, which statements true?
Answer:
The universe was formed by a by the BIG BANG.
If i'm right plz mark be brainly.
Explanation:
Which is a characteristic of the polar water molecule?
Answer:
I hope that helped you to answer this question
Answer:
A tetrahedral electron domain geometry with covalently bonded atoms.
can i pls have help with this
Answer:
Scientists try to control most variables in an experiment to find a relationship between the independent variable and the dependent variable
Answer:
Controls are done in order to know if experiments or the subjects being tested are working. Both the control and the subject are compared and observed for change or improvement that will lead to answering to the hypothesis. Since the tested variables will determine the results.
A group of students hypothesizes that the amount of alcohol produced in fermentation depends on the amount of glucose supplied to the yeast. They want to use 5%, 10%, 15%, 20%, 25%, and 30% glucose solutions. 1)What is the independent variable? 2)What is the dependent variable? 3)What control treatment should be used? 4)What variables should be standardized (controlled)? 5)What type of graph is appropriate for presenting these data?
Answer:
1) Glucose solutions
2) Amount of alcohol
3) Water
4) Yeast
5) Bar chart
Explanation:
1) Independent variable is the variable that is "intentionally altered" by the researcher only and is not affected by any other variable. The Independent variable in the question is the glucose solutions.
2) Dependent variable is the variable that is as a result of the independent variable. The dependent variable in the question is the amount of alcohol.
3) The control treatment that should be given to the control group should be water. The control group is the group in which other groups are usually compared to and are hence given the control treatment.
4) Control variable is the variable that is kept constant throughout the course of an experiment. The control variable in the question is the yeast.
5) The type of graph that will best represent these data is the bar chart. The glucose solution will be on the x-axis while the amount of alcohol produced will be on the y-axis.
Does anyone know how to do independent and dependent variable for Science
Answer:
independent variable: type of liquid
dependent variable: height of plants
Explanation:
The dependent variable is the value that changes in response to a change in the independent variable. The height of the plants will depend on the type of liquid that each plant is watered with. Hope this helps!
Which category is the independent variable?
Answer:
Amount of Vitamin C
Explanation:
The pounds of growth is dependent of how much vitamins are given
Choose the best scientific design to test the question
Answer:
You can use the scientific method. you state the problem find out about the topic, predict the outcome of the problem ,create a procedure to test the hypothesis, record the result of the experiment, compare the hypothesis to the experiment conclusion.
Explanation:
A group of the same cells working together make up tissues. Two or more tissues working together make up the_____ Response area of organization
Answer:
limb
Explanation:
the answer is limbs
Two or more tissues working together make up organs in the body.
What are tissues?Tissues are formed of group of cells. they have specific origin and function.
The tissues forms organs and organ system in the body of an organism.
Based on their ability to perform different function and distinct morphology, tissues are classified into four main types.
Epithelial tissueConnective tissueMuscle tissueNervous tissueEpithelial tissues create a protective lining around the delicate organs. They occupy the linings of digestive track, urinary track, etc. Epithelial tissues are protective and secretory in functions.
Connective tissues connect the organs in the body and also present in fat storing cells. Blood is an example of specialized connective tissue.
Muscle tissues have the property of contraction. Skeletal muscle, smooth muscles and cardiac muscles are present in the body of an organism.
Nervous tissues contain specialized nerve cells for the conduction of information and chemical signals from central nervous system to various parts of the body.
Therefore, tissues are important in control, co-ordination and regulation of body functions.
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As a group, discuss the opening analogy of an efficiency apartment and a mansion as it relates to cells. Record your final consensus of how this analogy applies to cell structure.
Answer:
Their structures have to do more things (in an apartment the living room is also the dining room), This analogy applies to cells because simpler prokaryotic cells, which have less structures. It also applies to more complex eukaryotic cells that have more structures, where each structure only does a singular task. (In a mansion each room, only serves one purpose.) I believe it means that even though the homes/cells may appear different, they all include the same basic essentials.
Explanation:
An apartment could represent a prokaryotic cell while a mansion could represent a eukaryotic cell, since the latter is much larger and more complex.
Prokaryotic cells are unicellular organisms that lack membranous organelles and whose genetic material is dispersed in the cytoplasm in an area called the nucleoid. Examples of these type of cells are bacteria, microscopic organism. They are small cells, approximately 1-10 µm, and they have the following components:
Cell membrane Cell wall Cytoplasm Nucleoid Plasmids Ribosomes Periplasm Flagellum Capsule Pili or fimbriae GlycocalyxOn the other hand, eukaryotic cells present organelles with membranes and an organized cell nucleus containing DNA. They are larger than prokaryotic cells, 10-30 µm in size. Examples of eukaryotic cells are the ones that form complex organisms such as animals and plants. However, there are also some eukaryotic unicellular organisms, such as protozoa. They have the following components:
Cell membrane Cell wall (in plants) Cytoplasm Mitochondria Chloroplasts Ribosome Lysosome Golgi apparatus Smooth Endoplasmic Reticulum Rough Endoplasmic Reticulum Centriole Flagellum (not in all) Vacuole Microtubules VesiclesProkaryotes and eukaryotes vary in several important ways and these differences include structural variation, whether a nucleus is present or absent, and whether the cell has membrane-bound organelles, and molecular variation, including whether the DNA is in circular or linear form. Since prokaryotic cells are so much smaller and simpler, they would be like an apartment, while eukaryotic cells are like a mansion because they are much more bigger, have more structures and are more complex. In a smaller space everything is close at hand, while in a larger space more organization is needed to find things efficiently. Eukaryotic cells, as they form more complex organisms, need to produce more energy and have a larger number of organelles, with more important functions, so the cell needs a larger size to accommodate them.
Therefore, eukaryotic cells resembles a mansion and prokaryotic cells resembles an apartment. This is because of the larger size of the eukaryotes and its cellular machinery which is more complex since it has an endomembrane system which enables greater metabolic efficiency. This allows the separation of functions in the cytoplasm. And prokaryotes are much smaller and simpler, they do not need so much metabolic efficiency or a big size.
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As dehydration progresses and blood volume decreases, blood pressure will ______ and heart rate will _______.
Answer:
the blood pressure will increase and the heart rate will stay the same
Explanation:
Answer:
rise, fall
Explanation:
Read the claim. Who might benefit from this claim? Breakfast is an important meal. It jump starts the body's process of using calories to break down food. Appetite can decrease with age, but going too long without eating causes metabolism to slow down. Current research shows that incorporating legumes such as lentils and chickpeas into meals boosts metabolism for twenty-four hours.
Who might benefit form this claim?
A people who have a fast metabolism
B stores that sell exercise equipment
C people who take vitamin supplements
D grocery stores that sell legumes
Answer:
I think it is D.
Explanation:
People who have a fast metabolism dont need it so whats the point, and the others are just random.
Answer:
D is the correct answer
Explanation:
If a trait is influenced by genes, then it ought to be more highly correlated across pairs of ________ than across pairs of ________.
Answer:
identical twins
fraternal twins
If a trait is influenced by genes, then it ought to be more highly correlated across pairs of identical twins than across pairs of fraternal twins.
What are Twins?Twins are defined as two offspring produced from a single pregnancy, which can either be monozygotic means that they develop from a single zygote, which splits and forms two embryos, or dizygotic means that each twin develops from a separate egg and each egg is fertilized by the own sperm cell.
Identical twins are also called as monozygotic twins which results from the fertilization of a single egg by a single sperm, with the fertilized egg then splitting into two. These share the same genomes and are always of the same sex.
Fraternal twins are called dizygotic twins which result from the fertilization of two different eggs with two different sperms during a single pregnancy. They share half their genome just like any other siblings which may not be of the same sex or look alike.
Thus, if a trait is influenced by genes, then it ought to be more highly correlated across pairs of identical twins than across pairs of fraternal twins.
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Identify the best 2 problem questions about things you might be observing right now.
please help ASAP!!!!
Answer:
Option 2 and 4
Explanation:
i think it is option 2 and 4 because it tells us what a character does :)
5. Which type of microscope would be the best tool to use to view the surface of a bacterial cell? Why? Answer:
Answer:
Electron Microscopy. EDS Analysis.
A scanning electron microscope is the best tool for studying the details of the surface of a bacterial cell.
What is a scanning electron microscope?
A scanning microscope or SEM is a microscope in which a focused beam of high-energy electrons is used for to the generation of signals on the surface of solid specimens. These signals are derived from the interactions of electron-sample.
This reveals the information about the surface of a sample which includes external morphology or texture, chemical composition, and structure and material orientation of the sample. In most of the applications of this microscope, the data is collected for the selected area of the surface of the sample and the 2-D image for that is produced which displays spatial variations in these properties.
In a scanning mode, areas ranging from 1 cm to 5 microns are visualised using conventional techniques of SEM techniques. In this, the magnification ranges from 20X to approximately 30,000X with a spatial resolution of 50 to 100 nm.
Therefore, to study the details of the surface, a scanning electron microscope is used.
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1. For each missing word or phrase, circle the choice that correctly completes the sentence. The three main gases that trap heat in Earth's atmosphere are (carbon dioxide / oxygen / nitrogen / hydrogen), methane, and water vapor. They contribute to the (climate / ecosystem / greenhouse / biosphere) effect, which makes Earth's temperatures warmer than they would be otherwise.
Answer:
Carbon Dioxide; Greenhouse
Explanation:
Carbon dioxide, methane, and water vapor all trap heat in the Earth's atmosphere. Because they are trapping the gasses in the atmosphere, they are contributing to the Greenhouse effect, which makes Earth's temperatures hotter/warmer. The "Greenhouse" part is saying that everything underneath the Earth's atmosphere is "housing" the heat and keeping the heat in.
Earth can be divided into how many physical layers?
Name one reason why a controlled experiment may not be possible
there could be harmful chemicals
Scientist wanted to know how the enzymes of a new genetically modified bacteria would react to environmental factors. Which test below would be one they may run?
Answer:
Enzymes are catalyst also called biocatalyst
Explanation:
Enzymes are called the biological catalyst. These are also called biocatalyst. These enzymes speed up the biochemicals in the body of an organism. These are extracted from the cells and then catalyze at wide range. Enzymes are used to produce the sweetening agents and for the modification of the agents.
There some techniques that are used to test enzymes such as:
Gel electrophoresis
PCR
Cloning
Biotechnology