Answer:
Water is more dense than ice, so ice will have lower density that make it float
Which clue can be used to identify a chemical reaction as a combustion reaction? Oxygen is a product. A hydrocarbon reacts with oxygen. Water and carbon dioxide react. The reaction involves ions.
Answer:
A hydrocarbon reacts with oxygen
Explanation:
The clue that can be used to identify a chemical reaction as a combustion reaction from the options would be if a hydrocarbon reacts with oxygen.
Basically, a combustion reaction is a kind of reaction involving oxygen and another reactant with energy being released in the process. The energy is usually in the form of light and heat.
Thus, following the definition:
Oxygen is rather a reactant, and may not be a product in combustion reactionsWater reacting with carbon dioxide is not a combustion reactionReaction involving ions may not be a combustion reactionThe only reaction that may identify as a combustion reaction is, therefore, the one involving hydrocarbon and oxygen.
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1) Which of the following types of heterotrophs eat other animals?
A. omnivores
B. herbivores
C. carnivores
Answer:
A & C (Omnivores and Carnivores) eat other animals.
Answer:
A and c
Explanation:
heterotrophs eat other animals?
. omnivores and carnivores
PLEASE HELP I NEED THIS ASAP!!!!!!!!!!!!!!!!!!!!!!A leaf's stomata____. A. contain chlorophyll B. protect the leaf from physical damage C. open and close to control evaporation D. are part of the spongy layer
Answer:
C. open and close to control evaporation
the membranous compartmentalization of a cell
Answer:
organelles in eukaryotic cells live and work in separate areas within the cell in order to perform their specific functions more efficiently.
Explanation:
i hope this is right :)
Answer: allows different chemical conditions to be maintained in different parts of the cell
Explanation:
What two factors keep Earth in orbit around the sun and the moon in orbit around Earth? A:gravity and distance B:Mass and distance C:force and speed D:gravity and force
Answer:
gravity and inertia Gravity keeps Earth, along with the other planets in line, as inertia keeps them moving creating an orbit.
its C hope it help
What is in the center of every atom?
Answer:
The Nucleus, comprised of Protons and Neutrons.
How is it possible that all animal life depends on the chloroplast for energy
chloroplast contains chlorphyll . Chlorophyll is used in photosynthesis to produce glucose . (photosynthesis is a process where green plants manufacture simple sugar (glucose) from carbondioxide and water by using sunlight ) 6co2+6h2o=c6h12o6+6o2
if theres no chloroplast no glucose will be produced so animals will have no energy. chloroplast must be present in order of photosynthesis to take place and produce glucose , when plants produce glucose animals get the energy needed by feeding on plants (in simple words animals eat the sugar that plants have produced )
A 7.2 × 10–5 C charge has an electric potential energy of 1.08 × 10–2 J. The electric potential, to the nearest whole number, is V.
Answer:
150.
Explanation:
On edge
The electric potential, to the nearest whole number is 150 V.
What is the electric potential energy?The electric potential energy denoted by U is proportional to the charge and inversely proportional to the distance between the point where its is brought from infinity to the charge.
U = kQ₁Q₂/r
For identical charge,
U =kQ²/r................(1)
and the electric potential is given by
V = kQ /r................(2)
Dividing both the equations, we get
U/V = Q
Substitute charge Q = 7.2 × 10⁻⁵ C, Electric potential energy U = 1.08 × 10⁻² J, then the electric potential will be
V = 1.08 × 10⁻² / 7.2 × 10⁻⁵
V = 150 Volts
Thus, the electric potential is 150 Volts.
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Enzymes are biological catalysts. Enzymes are proteins that are found inside cells to
increase the rate of chemical reactions within each cell. Enzymes are denatured
(destroyed) by various environmental conditions. Amylase is an enzyme in the digestive
system that helps to break down complex carbohydrates into simple sugars.
HYPOTHESIS: Amylase works best in an environment with a pH level of 7. what is the independent and dependent variable sum1 please help!
Answer:
Explanation:
independent= pH as you will change the pH in order to test your hypothesis and see if it's true
dependent= how amylase works-needs to be measured so you can see how easily it does it function depending on the pH (dependent on the independent variable)
The independent variable is pH, you change it to test your hypothesis; The dependent variable is the activity of amylase enzyme depend on the pH value.
What are the properties of an enzyme ?Enzymes are protein catalysts that speed up the rate of biochemical reactions
The enzyme activity is pH-specific, catalyze both forward and reverse reaction but do not decide the direction of the biochemical pathway.
An enzyme have active site which bind to substrate and form desired products.
Several factors influence the enzyme activity like heat, temperature and varying pH.
Enzyme show absolute, relative, group, stereo-specificities and regulatory function.
Physical properties include enzyme act as colloid, it become inactivated below boiling point of water.
Enzymes are thermos-labile as it can withstand temperatures of 100 degrees.
The optimum temperature needed for enzymatic activity varies from 25 degrees Celsius to 45 degrees Celsius.
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PLEASE HELP MEH!!!!
A patient’s blood is tested for growth hormone which has a molecular mass of 848.952 g/mol. The test results show a normal concentration of 4 . 0 × 10 − 6 g/L. How many moles of growth hormone are in 1 L of blood?
*
4. What are the only prokaryotes?
Answer:
Bacteria is the only prokaryotes.
Some cynobacteria are also included in prokaryotes.
what is the application of genetics in medicine
Genetic applications in medicine can include studies of inheritance, mapping disease genes, diagnosis and treatment, and genetic counseling.
Why fatty acids need a protein transporter to move cross membrane?
Answer:
Transport of long-chain fatty ácids across the cell membrane has long been thought to occur by passive diffusion........Fatty ácids transporters hold promise as a future target to rectify lipid fluxes in the body and regain metabolic homeostasis.
Which statement explains how determining the age of the remains of living things is similar to dating rocks
Answer:
it is choice a.............................
Explanation:
on test
Answer:
A
Explanation:
Silus wants to monitor the temperature of a reaction every 0.5 seconds for 30 minutes. He plans to generate a graph
of the temperature values over t ime and insert the graph into a text document,
a. a liquid base thermometer and graphing calculator
b. a liquid base thermometer and computer
c. an electronic temperature probe and computer
d. an electronic temperature probe and graphing calculator
Answer:
C. an electronic temperature probe and a computer
Explanation:
The answer is C on Edge. (VERIFIED Edge Answer)
Make sure to click "thanks" and rate this answer to let others know this is the correct answer for this question.
Edge Tip: Answers do not mix or change.
The best pair of tools that Silus should use in this experiment is: c. an electronic temperature probe and computer.
What is a temperature probe?A temperature probe can be defined as a scientific instrument (sensor) that is designed and developed for the measurement of the degree of coldness or hotness (temperature) of any physical object.
This ultimately implies that, an electronic temperature probe and a computer are the best pair of tools that Silus should use in this experiment, so as to generate a graph of the temperature values over time.
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Marine crustaceans that are sessile, secrete calcareous plates and filter-feed are:_____.
a. ostracods.
b. barnacles.
c. copepods.
d. decapods.
e. isopods.
Answer:
B. Barnacles
Explanation:
Marine crustaceans that are sessile, secrete calcareous plates and filter-feed are Barnacles. Barnacles are the only sessile crustaceans known in the world.
They are characteristic to marine environments and they are usually found in shallow environments. They are edible due to their relationship with crustaceans such as shrimps etc
What type of macromolecule is oil?
What are the 5 main steps in the formation of the Solar System?
Answer:
These steps should cover it all
Can i have brainley please
Explanation:
Step 1 of the formation of the solar system
the solar nebula collapses
Step 2 of the formation of the solar system
rotating protostellar disk
Step 3 of the formation of the solar system
center of nebula fusion begins, star is born
Step 4 of the formation of the solar system
Planeteseimals eventually planets form
The formation of clumps, its collapse, heating and rapid cooling, formation of planetesimals, and Oligarchic growth are the five main steps of solar system formation.
What is a solar system?The Solar System is composed of the Sun and the planets gravitational bound to the Sun.
The Solar System went through five stages of creation and initial evolution:
The establishment of dense clumps within a massive molecular cloud.The clumps crumble by gravitational force to establish a protostar; angular momentum conservation outcomes in a protoplanetary disc.The sudden heating and cooling of dust results in the formation of Ca-Al-rich refractory aggregates (CAIs) and spatters of silicate melt.Planetesimals form from dust, CAIs, and chondrules.Oligarchic development into planet embryos and planets.Thus, above mentioned are the five steps in formation of solar system.
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In Oxygen molecule O2, stability is gained through sharing of
Answer:
Trees and plants.
Explanation:
Trees give us oxygen and plants get rid of carbon dioxide and remake it as oxygen.
In the Oxygen molecule O2, stability is gained through sharing of two pairs of electrons with a single neighboring atom.
What is the sharing of electrons?The sharing of electrons gives rise to the formation of covalent bonds between two atoms. Atoms will be covalently bonded in order to gain more stability. During the process of sharing electrons, they are simultaneously attracted by the two atomic nuclei.
The stability of oxygen molecules is gained through the help of non-polar covalent bonds. This means that there is no difference in electronegativity of bonded atoms.
The valence shell of oxygen has six electrons, so they need two more electrons in order to fulfill its octet and maintain stability. The sharing and paring of electrons between two or more atoms construct a bond known as covalent bonds.
Therefore, in the Oxygen molecule O2, stability is gained through sharing of two pairs of electrons with a single neighboring atom.
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One summer, the anthropologist returns to the site at the start of a new field season. He discovers that the same local residents who he hires in the summer have allowed their cattle to graze on the site over the winter while he was gone. The cattle have trampled some of the site and have permanently damaged the irreplaceable fossil materials. How should he proceed?
Answer:
The remaining part was not damage so the anthropologist can proceed his research.
Explanation:
The anthropologist should continue his work on the remaining part of the field for its study because the remaining part is not disturb by the animals, only little part of the field was damaged during grazing so the anthropologist can take his information from the remaining field and avoid taking data from the affected field due to damaged was done fossil materials and the fossil materials was not present in its original shape..
In red shift the wavelengths of light become ?
WHAT DO SCIENTIST DO WHEN THEY RUN AN EXPERIMENT
hat type of cells do not undergo mitosis?
Answer:
Neurons, cardiac muscle, Red/white blood cells, skeletal muscle, smooth muscle, sperm cells, egg cells
Explanation:
Which observations did Darwin make?
Select the three correct statements.
Each individual frequently and continuously uses the necessary organs.
Heritable variations exist in each population.
All organisms share similar features.
Each species seems suited for its particular environment.
)
A population has more individuals than can be supported by the environment.
The population size suits the resources of the environment.
Answer:
Heritable variations exist in each population.
Each species seems suited for its particular environment.
A population has more individuals than can be supported by the environment.
Explanation:
Answer:
each species
A population has more
Heritable variations
Explanation:
I need some help! What cell structure goes to what definition? The structures as well as the descriptions are below.
lysosome
vesicle
nucleus
Golgi apparatus
chloroplast
smooth endoplasmic reticulum
nucleolus
rough endoplasmic reticulum
ribosome
mitochondrion
1.
contains chlorophyll, site of photosynthesis
2.
contains chromosomes, directs cell’s activities
3.
contains hydrolytic enzymes
4.
membranous network that detoxifies and helps synthesize lipids
5.
membranous network that helps synthesize proteins
6.
modifies and stores the products of the ER
7.
site of cellular respiration and ATP production
8.
site of protein synthesis
9.
site of ribosomal RNA synthesis
10.
small membrane-bound sac within a cell
Answer:
1-chloroplast
2-Golgi apparatus.
Explanation:
Explain how the bacteria and animals around the hydrothermal vents showed scientists that life was much more adaptable than they had believed.
Explanation:
Well, its extremely hot in the hydrothermal vents. Scientists simply believed it would be impossible for anything to survive due to the heat. Bacteria and micro-organisms were able to adapt to growing there, though. So in short words, they survived extreme conditions teaching scientists that life was quite adaptable.
Weird fun fact: In Switzerland it is illegal to own just one guinea pig. Felt the need to mention that ^ Sorry, I know it has nothing to do with the question but i felt it was worth speaking of.
At which stage of development does the embryo implant in the uterus?
Answer:
Blastocyst stage
Explanation:
A baby undergoes different stages of development before they become fully matured. It all begins with the process of fertilization which involves a sperm cell coming in contact with an egg.
After a successful fertilization, the fertilized egg travels down to the uterus where it undergoes series of cell division till it becomes a stack of arranged cells known as the blastocyst.
During the blastocyst stage, the embryo fastens itself to the edge of the uterus, this process is known as implantation.
Hence, the embryo implants in the uterus during the blastocyst stage.
You are running a marathon and observe that running increases your pulse rate. Using what you know about the scientific method complete the following:
1. Hypothesis: __________________________________________________________________
_____________________________________________________________________________
2. Independent variable: _________________________________________________________
3. Dependent variable: ___________________________________________________________
4. Controlled variables (at least 3): _________________________________________________
_______________________________________________________________________________
5. Control Treatment: ___________________________________________________________
6. Experimental Treatment: _______________________________________________
Answer:
hypothesis is A hypothesis (plural hypotheses) is a precise, testable statement of what the researcher(s) predict will be the outcome of the study.
Explanation:
independent variable is what u can change
dependent variable is the one u can measure
control variable is one u keep the same
control treatment In the design of experiments, treatments are applied to experimental units in a treatment group. In comparative experiments, members of a control group receive a standard treatment, a placebo, or no treatment at all. There may be more than one treatment group, more than one control group, or both
experimental treatment in research, the conditions applied to one or more groups that are expected to cause change in some outcome or dependent variable.
the wolf population on isle royale fell to just twelve animals after the accidental introduction of canine parvovirus. years later scientists discovered that the skeletons of dead wolves had a high level of deformities in the pelvis and tail bones. how would you explain this finding
Answer:
Genetic drift caused fixation of deleterious alleles that impaired bone development.
Explanation:
With a low population, the effects of parvovirus will have a lasting impact on future generations as the alleles are less likely to be bred out of the population.
All of the following movements can occur across the intervertebral joints of the vertebral column except:______
a) extension.
b) lateral flexion.
c) flexion.
d) dorsiflexion.
Answer:
D) dorsiflexion
Explanation:
extension, lateral flexion, flexion can occur across intervertebral joints of the vertebral column. Dorsiflexion is the odd one out.
Dorsiflexion is the act of bringing the toes closer to the shin, it is also referred to as the backward bending of an individual's foot or hand. when someone is walking on the heels of their ankle, their ankle can be described to be in dorsiflexion. therefore option d answers the question.