Explanation:
physical change is the change which does not cause change in its chemical composition like shape,size,colour,odour,melting point,boiling point etc
all of the following gases are naturally occurring in the atmosphere EXCEPT—
a) CO2
b) H2O
c) NO2
d) CFCs
Answer:
CFCs
Explanation:
because CO2,H20,NO2 are all naturally occurring and CFCs are man made
what is a vector in life science
Answer: They are used in science to describe anything that has both a direction and a magnitude. They are usually drawn as arrows, the length of which represents the vector's magnitude.
CREDIT: scientificamerica
You have been hired as a field assistant for a researcher interested in the evolution of flower characteristics in orchids. Complete an experiment that determines whether color, size, shape, scent, or amount of nectar is the most important factor in attracting pollinators to a particular species. Assume that you can change any flower's color with a dye and that you can remove petals or nectar stores, add particular scents, add nectar by injection, or switch parts among species by cutting and gluing. Match the terms in the left column to the appropriate blanks in the sentences on the right. Not all terms will be used.
a. one characteristic.
b. pollination success.
c. aiters others characteristics.
d. affects pollination success the most.
e. has no effect on pollination.
f. other characteristics.
g. no characteristics.
h. all characteristics.
1. Present a flower with____changed to the normal pollinator. As a control, presenta flower with____changed to the normal pollinator has no effect on pollination
2. Record any measure of____.
3. Repeat for flowers with changed all characteristics other characteristics no characteristics alters other characteristics This characteristic will be____.
4. Analyze the data to determine which altered characteristic____.This characteristic will be the result of the experiment.
Answer:
[tex]\text{Present a flower with one characteristic changed to the normal pollinator. }[/tex][tex]\text{As a control, present a flower with no characteristics changed to the normal pollinator}[/tex]
[tex]\text{Record any measure of pollination success}[/tex]
[tex]\text{Repeeat for flowers with other characteristics changed}[/tex]
[tex]\text{Analyze the data to determine which altered characteristics affect pollination }[/tex][tex]\text{success the most. This characteristic will be the result of the experiment.}[/tex]
Explanation:
The missing information is attached below.
[tex]\text{Present a flower with one characteristic changed to the normal pollinator. }[/tex][tex]\text{As a control, present a flower with no characteristics changed to the normal pollinator}[/tex]
For the control, you'll need something you're already familiar with. In this scenario, a normal flower with no changes in characteristics is the best control. And if no data is accessible, you still have data on the success rate of a typical flower, which can be used as a guideline. And, for the initial configuration, you can only adjust one characteristic so it would be easier to maintain track of and analyze the data gathered.
[tex]\text{Record any measure of pollination success}[/tex]
Since the aim of your experiment is to examine the influence of flower characteristics on pollination performance, you should keep track of the active pollination events. To have more accurate results, this would require listing the total number of plants that were to be pollinated.
[tex]\text{Repeeat for flowers with other characteristics changed}[/tex]
Once you've completed the initial examination, you'll need to run tests on various characteristics to see whether they have some impact on pollination performance. To see the importance of different characters on pollination, change only one trait in flowers; if you'd like to research combined results, create pairs and change them together.
[tex]\text{Analyze the data to determine which altered characteristics affect pollination }[/tex][tex]\text{success the most. This characteristic will be the result of the experiment.}[/tex]
Your outcome is also the one that has gotten the most constructive or negative reviews. If some changed characteristic significantly affected the number of pollination efficiency, that is your outcome, because that is what you can mention as a good result and pollination enhancer.
Which of the following is correct descriptions of aeolian deposits?
Both loess and sand dunes are formed by accumulation of wind-blown silt
Loess is formed by accumulation of wind-blown sand; sand dunes are formed by accumulation of wind-blown silt
Both loess and sand dunes are formed by accumulation of wind-blown sand
Loess is formed by accumulation of wind-blown silt; sand dunes are formed by accumulation of wind-blown sand
Answer:
Option D
Explanation:
Loess is a wind blown silt that piles into high dunes which later hardens. On the other hand, the sand blown debris is known as sand dunes which are rounded hillocks and is broken by the wind.
Hence, option D is correct
What is the term used for genetic mutations that may result in neutral or even negative outcomes?(1 point)
A) genetic drift
B) natural selection
C) artificial selection
D) genetic modification
Answer:
Genetic Drift
Explanation:
Evolutionary change can and does occur without natural selection. This usually occurs as a result of genetic drift: genetic mutations that may result in neutral or even negative outcomes.
The term 'GENETIC DRIFT' is used for genetic mutations that may result in neutral or even negative outcomes (Option A).
Genetic drift refers to random fluctuations in the frequency of a given gene variant (i.e. an allele) and different genes in the individuals that form a population.Genetic drift may occur on neutral or negative alleles carried out by the individuals of a population.These random fluctuations cause changes in the allele frequencies, which are fixed when they reach a frequency equal to one (1).In conclusion, the term 'GENETIC DRIFT' is used for genetic mutations that may result in neutral or even negative outcomes (Option A).
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Are the energy resources used at school renewable or nonrenewable
Answer:
Resources are characterized as renewable or nonrenewable; a renewable resource can replenish itself at the rate it is used, while a nonrenewable resource has a limited supply. Renewable resources include timber, wind, and solar while nonrenewable resources include coal and natural gas.
Explanation:
6. Looking at the chemical equation for anaerobic respiration in the Introduction portion
of this lab, what product of cellular respiration was the gas in the balloon?
NEED HELP
Answer:
Because carbon dioxide is a component of your breath, and when you exhale, you release it.
Carbon dioxide
How do you blow up a balloon? You might know that carbon dioxide is what we exhale into a balloon, but where does it come from? Carbon dioxide is a waste product from a process called cellular respiration, which uses oxygen and sugar to make energy and carbon dioxide.
What is carbon dioxide?Carbon dioxide (chemical formula CO2) is a chemical compound occurring as a colorless gas with a density about 53% higher than that of dry air. Carbon dioxide molecules consist of a carbon atom covalently double bonded to two oxygen atoms. It occurs naturally in Earth's atmosphere as a trace gas. The current concentration is about 0.04% (417 ppm) by volume, having risen from pre-industrial levels of 280 ppm. In water it forms an acidic solution due to the formation of carbonic acid (H2CO3). Natural sources include volcanoes, forest fires, hot springs, geysers, and it is freed from carbonate rocks by dissolution in water and acids. Because carbon dioxide is soluble in water, it occurs naturally in groundwater, rivers and lakes, ice caps, glaciers and seawater. It is present in deposits of petroleum and natural gas. Carbon dioxide has a sharp and acidic odor and generates the taste of soda water in the mouth, but at normally encountered concentrations it is odorless.
As the source of available carbon in the carbon cycle, atmospheric carbon dioxide is the primary carbon source for life on Earth and its concentration in Earth's pre-industrial atmosphere since late in the Precambrian has been regulated by photosynthetic organisms and geological phenomena. Plants, algae and cyanobacteria use energy from sunlight to synthesize carbohydrates from carbon dioxide and water in a process called photosynthesis, which produces oxygen as a waste product
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What was the procedure during the first successful vaccination?
Which of the following are not found in Cyanobacteria?
Answer:
Like all other prokaryotes, cyanobacteria lack a membrane-bound nucleus, mitochondria, Golgi apparatus, chloroplasts, and endoplasmic reticulum. All of the functions carried out in eukaryotes by these membrane-bound organelles are carried out in prokaryotes by the bacterial cell membrane.
state how the protein and energy requirements of the following will differ from those of a 16 year old female who does not take much exercise (1) An elderly person (2) a 2 year old child (3) a pregnant women (4) a male athlete
Answer:
Elderly people need a lot of protein but less energy and a pregnant woman need both nutrition enough to cell function and tissue formation of the embryo and more equal does the the 2 year old baby need both the nutrition.
diarrhoea definition
Answer:
A condition in which feces are discharged from the bowels frequently and in a liquid form.
Explanation:
Hope this helps and have a wonderful day!!!
What are tissues made of?
A. Groups of organs
B. Groups of reflexes
C. Groups of cells
D. Groups of systems
Answer:
C
Explanation:
A tissue is made up of lots of the same type of cells
Answer:
C. Groups of cells
Explanation:
They are made up of cells. When they are formed together, they carry out specific functions.
which organisms transform nitrogen to a form that useful to plants
Answer:
nitrogen-fixing bacteria
Answer: A
Explanation:
Which of the following biotic factors is associated with increasing the capacity of the organisms to move across fragmented landscapes? Patch size, connectivity,Patch shape, Distance from other landscape patches
Answer:
connectivity
Explanation:
Natural and anthropogenic alterations affect the landscape. The unmeasurable use of the land for farming, cattle industry, buildings, among many other activities, has caused a severe fragmentation in the original landscape that has been seriously affecting biodiversity.
Fragmentation occurs when a big extension is transformed into many different and smaller patches, separated by another type of cover. You can imagine, for instance, an area used for mono-culturing, which you can see as a homogeneous space of the same texture and color, and small green islands of original vegetation dispersed in this cropped area. These small islands are separated from each other by the crop.
These alterations produce patches or tesserae in the landscape. Patches are relatively homogenous areas with well-defined borders and environmental characteristics very different from those of the surrounding areas. These are like islands. You can think about patches or tesserae as the remaining pieces or units of the original landscape dispersed inside an affected bigger-sized area.
Fragmentation generates a significant loss of physical continuity between the different areas of the original habitat. It might negatively affect biodiversity by decreasing patch sizes, completely isolating them from each other, and increasing the border effect.
Many species can not survive if they are not in the original habitat. Probably they do not find enough food or shelter, or they are very exposed to predation. So they need to stay in the patch. Most of these species are not even adapted to living on the border of the patches. Eventually, fragmented areas can not support some population species that end by dying because they can not survive for a long time in that reduced place. Patches are not suitable to support too many species.
For these reasons, the connection between islands becomes so important. To allow species to move from one place to the other, interact with other species, reproduce, find food, shelter, avoid predation. In other words, survive. Connectivity is how the territory makes possible individuals flow or genetic flow, between the different tesserae.
Suppose an explorer discovered a unique new species of plant and collected a sample for analysis by a geneticist. The geneticist then isolated chromatin from the plant sample and examined the chromatin using electron microscopy. The chromatin observed was organized in a way that is similar to beads on a string A small amount of nuclease was then added, which was observed to cleave the string into individual beads that each contained 280 bp of DNA.
Histone H1 H2A H2B H3 H4 H7 (new histone)
Percentage 12.5% 25% 25% 0% 26%
After thorough digestion with more nuclease, only a 120 bp fragment of DNA remained attached to a core of histone eins. Analysis of the histone core revealed the data dicated in the table to the right.
Using the data provided, determine the conclusions that the geneticist could make about the likely structure of the nucleosome in the chromatin of this new plant species
A. The nucleosome core contains a heterodimer of the histones H7 and H1
B. The nucleosome core contains two each of histones H2A, H2B, and H4
C. The nucleosome core contains a homodimer of the histones H2A, H2B, and H4
D. The nucleosome core contains one each of histones H1 and H7
E. The nucleosome core histone H7 replaces the standard histone H3
my brain can't process this lol
2. A hormone that is produced by the endocrine system targets specific
cells ir many different parts of the body. Which of the following
mechanisms explains the best way for the hormone to efficiently reach all
of its target cells?
The hormone is released into the bloodstream where it can be carried throughout the
body to the target cells with specific receptors
The hormone reacts with neurons close by that signal the target cells throughout the
body
The hormone is transported by local regulation to cells close by that trigger the target
cells
The hormones moves throughout all the cells until it reaches the cells with the
specific receptors for the signal
Hurry please I’m taking a exam
Answer:
The correct answer is the first option:-
The hormone is released into the bloodstream where it can be carried throughout the body to the target cells with specific receptors.I learnt in biology that hormones are transported through blood so they reach the specific receptors and act upon them so am sure this is the answer!.
The other options aren't right for the question.
A kitten embryo is growing inside the uterus of a cat. What is happening to the cells of the kitten embryo?
A) Mitosis, the cells are differentiating
B) Meiosis, the cells are differentiating
C) Meiosis, the genes are being shuffled around
D) Mitosis, genes are being shuffled around
Please answer and don't put fake answer I really need this right.
From the list of activities below, select those that can increase your carbon footprint.
installing solar panels on your home
driving a car that uses gasoline
keeping non-LED lights on in your home all night
purchasing foods processed in a factory
planting a garden
Answer:
driving a car the uses gasoline
keeping non-led lights on in your home all night
purchasing foods processed in a factory
Answer:
driving a car that uses gasoline
keeping non-LED lights on in your home all night
purchasing foods processed in a factory
Explanation:
A. The capture/mark recapture method was used to give an accurate
estimate of the rhinoceros beetle population in the Western province. Traps
were set up and captured beetles were painted light brown as oppose to red an
yellow. All captured-recaptured were counted and recorded.
Total count
in
Total marked
Total counts
in
Total marked
40
40
15
35
Use the Lincoln Index to calculate the total beetle population?
You want to determine if the source of fecal contamination is from dairy cows or wild deer. Which antibiotic would give you the most clear results and why
Answer:
Piperacillin and tazobactam, imipenem and cilastatin, or meropenem may be used.
Explanation:
Antibiotics such as piperacillin and tazobactam, imipenem and cilastatin, or meropenem can be used for the treatment of Fecal coliform bacteria that causes fecal contamination. There are some other methods also used to avoid Fecal contamination i.e. boiling of water, treating water with chlorine, or UV disinfection are the methods that are used to reduce Fecal coliform bacterial infection.
2. Which part of a eukaryotic cell contains the instructions on how to recombine the molecules in nutrients into new molecules that the cell can use?
A. DNA in the nucleus
B. Chlorophyll in chloroplasts
C. Water in vacuoles
D. Digestive chemicals in lysosomes
How did a famous event change the course of the American Revolutionary War? in essay form pls
Answer:
The American Revolution was a political battle that took place between 1765 and 1783 during which colonists in the Thirteen American Colonies rejected the British monarchy and aristocracy, overthrew the authority of Great Britain, and founded the United States of America. See the fact file below for more information and American Revolution facts.
-The American Revolution, also known as the Revolutionary War, began in 1775.
-British soldiers and American patriots started the war with battles at Lexington and Concord, Massachusetts.Colonists in America wanted independence from England.
-The British government attempted to pass some laws, enforce several taxes, and increase more control over the colonies.
-The colonies strongly objected to these laws and taxes.
-They wanted England to have no control over them.
-For ten years before the war actually started, there was a lot of tension between England and the colonies.
-The colonies had no central government at the beginning of the war, so delegates from all the colonies were sent to form the first Continental Congress.
-George Washington, a former military officer and wealthy Virginian, was appointed Commander in Chief of the Continental Army.
-Members of the Continental Congress wrote a letter to King George of England outlining their complaints and declaring their independence from England.
-On July 4, 1776, the Continental Congress adopted the Declaration of Independence, in which the colonies declared their independence from England.
-The war ended in 1783, and the United States of America was born.
Explanation:
How much is )377373737373837828827383783737737+73737737374747774747478382828828287739278
Answer:
7.3737738e+40
Explanation:
pls foll ow me
i will foll ow back...
Which statement describes earthquakes which team explain one way that minerals form
Earthquakes are natural phenomena characterized by the sudden release of energy in the Earth's crust, resulting in seismic waves that can cause the ground to shake.
During an earthquake, the rocks along the fault experience immense pressure and deformation.
This intense pressure can cause minerals within the rocks to undergo various processes that contribute to their formation.
One way minerals can form as a result of earthquakes is through metamorphism.
Metamorphism is the process by which existing minerals within rocks undergo changes in response to high temperatures, pressures, and deformation.
During an earthquake, the rocks near the fault zone are subjected to extreme pressure and temperature conditions.
The intense stress causes the minerals to recrystallize, rearrange their atomic structures, and form new minerals.
This process is known as dynamic metamorphism or cataclasis.
The newly formed minerals in fault zones can include varieties of quartz, feldspar, mica, and other minerals commonly found in metamorphic rocks.
The specific minerals that form depend on the composition of the original rocks and the conditions present during the earthquake.
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____________ are made of a series of paired statements that describe physical characteristics of different organisms.
Answer:
taxonomic key
this is A series of paired statements that describe the physical characteristics of differnent organisms.
Answer:
taxonomic key
Explanation:
A series of paired statements that describe the physical characteristics of differnent organisms.
Do you think the amount of foam in the glasses will differ?
Answer:
these are all the answers to the entire course activity
Please mark as brainliest if this helps
Explanation:
The angle of the Earths axis keeps changing as the planet revolves around the Sun
True or False
How to Define life ?
The condition that distinguishes animals and plants from inorganic matter, including the capacity for growth, reproduction, functional activity, and continual change preceding death.
This is the definition of life.
Answer:
Life is defined as any system capable of performing functions such as eating, metabolizing, excreting, breathing, moving, growing, reproducing, and responding to external stimuli.
PLZ HELLLP TONS OF POINTS (this is on a FINAL)
two students are comparing scientific experiments to investigations. They came up with the following ideas.
Student A: Testing plant growth in different types of soils
Student B: Comparing the water level in a lake during different times of the year
Which student gave an example of a scientific experiment?
Student A because it requires experimental and control groups
Student B because it requires a hypothesis
Student A because it is preferably done in natural settings
Student B because it is preferably done across a long period of time
Answer:A
Explanation:
the measurement of the matter in the universe is called
Answer: mass
Explanation: