Answer:
Periodic table:
The periodic table is a chart that arranges the chemical elements in a useful, logical manner. Elements are listed in order of increasing atomic number, lined up so elements that exhibit similar properties are arranged in the same row or column as others.
Although Dmitri Mendeleev is most often cited as the inventor of the modern periodic table, his table was just the first to gain scientific credibility. It wasn't the first table that organized the elements according to periodic properties.
There are about 94 elements on the periodic table that occur in nature. All of the other elements are strictly human-made. Some sources state more elements occur naturally because heavy elements may transition between elements as they undergo radioactive decay.
Technetium was the first element to be made artificially. It is the lightest element that has only radioactive isotopes (none are stable).
The International Union of Pure Applied Chemistry, IUPAC, revises the periodic table as new data becomes available. At the time of this writing, the most recent version of the periodic table was approved in December 2018.
The rows of the periodic table are called periods. An element's period number is the highest unexcited energy level for an electron of that element.
Columns of elements help to distinguish groups in the periodic table. Elements within a group share several common properties and often have the same outer electron arrangement.
Most of the elements on the periodic table are metals. The alkali metals, alkaline earth, basic metals, transition metals, lanthanides, and actinides all are groups of metals.
The present periodic table has room for 118 elements. Elements aren't discovered or created in order of atomic number. Scientists are working on creating and verifying elements 119 and 120, which will change the appearance of the table, though they were working on element 120 before element 119. Most likely, element 119 will be positioned directly below francium and element 120 directly below radium. Chemists may create much heavier elements that may be more stable because of the special properties of certain combinations of proton and neutron numbers.
Although you might expect atoms of an element to get larger as their atomic number increases, this does not always occur because the size of an atom is determined by the diameter of its electron shell. In fact, element atoms usually decrease in size as you move from left to right across a row.
The main difference between the modern periodic table and Mendeleev's periodic table is that Mendeleev's table arranged the elements in order of increasing atomic weight, while the modern table orders the elements by increasing atomic number. For the most part, the order of the elements is the same between both tables, though there are exceptions.
Destiny:
That is, density (p) is equal to the total mass (M) divided by total volume (v). This formula can be used to determine the density of any substance. Common units for the measurement of density include grams (g), milliliters (ml), or grams per cubic centimeter. For instance, if there are 50 grams of a given substance within a cubic centimeter, that unit’s density is 50g/mm3.
Density can vary according to temperature and pressure. Applying pressure to an object decreases volume, which then increases density. Increasing the temperature of an object almost always decreases its density by increasing its volume.
By heating the bottom of a volume, especially a fluid volume such as a liquid or gas, convection causes the substance to rise, thus increasing the volume. The temperature variation is typically minor in solids and most liquids, but much greater in gases. The abbreviations to know are:
NTP: Normal Temperature and Pressure. Equal to 20 degrees C (68 F) and 1 atmosphere of pressure. Our examples below are all at NTP.
STP: Standard Temperature and Pressure. Equal to 0 degrees C (32 F) and 1 atmosphere of pressure.
These standardized pressures and temperatures make it possible to confirm equal densities are being used regardless of the application.
What percent of bones (of 206) are in the hands/feet?
Answer:
Explanation:
There are 206 bones in your body. 26 are in each foot. So the bones of your feet make up just over 25% of the bones in your body.
A protein extracted from a dinosaur bone is similar to the protein found in birds. How does this discovery provide genetic evidence that dinosaurs and birds are closely related?
A. It suggests they ate similar foods.
B. It suggests they had similar DNA sequences.
C. It suggests both existed during the same time in history.
D. It suggests both had bones made of protein.
Answer:
It suggests they had similar DNA sequences.
Explanation:
WILL GIVE BRAINLY!!! RANDOM WILL BE REPORTED! ASAP!!!!
1. Using what you have learned about Darwin's Evidence, which statement is true regarding the pictures above?
A. All organisms are of the same species
B. Fish embryos take a long time to develop because they change so dramatically as they develop.
C. Because the embryos all began to develop similarly, this could suggest that there was a common ancestor.
Answer:
I believe: C."Because the embryos all began to develop similarly, this could suggest a common ancestor." would be the best fitting of the current answer choices.
Explanation:
Process of elimination.
We know that organisms of the same species would all look essentially the same, and we know from the second image that they are nowhere near the same species.
Fish Embryos don't really have much to do with this overall, with the majority of the Embryos being from Mammals.
That leaves option C.
(I also somewhat remember this question from back when I was in AP Biology)
What are adaptations and give an example.
Answer:An adaptation can also be behavioral, affecting the way an organism responds to its environment.
Explanation:
An example of a structural adaptation is the way some plants have adapted to life in dry, hot deserts. Plants called succulents have adapted to this climate by storing water in their short, thick stems and leaves.
1. List 3 disadvantages of selective breeding.
2. Organisms of the same species can breed to produce.
a) Fertile offspring
b) Infertile offspring
c)Cute babies
3. A species at risk of extinction is considered a what type of species?
a)Disadvantaged species
b)Endangered species
c)In danger species
4. List 3 ethical issues associated with the production of GM crops
Explanation:
1.
1)it can lead to a loss of species variety
2)it can create offspring with different traits
3)it can change the evolution of species
2.
a)fertile offspring
3.
b) endangered species
4.
1) potential harm to human health
2)environment issues
3)can effect other crops for farmers, causing agricultural problems
what do you anticipate will happen to the size of the egg as you observe osmosis through the cell membrane?
Answer:
The size of the egg will increase
A short hike through the Sandia Mountains from early spring to late summer will often reveal several different species of penstemon. The Rocky Mountain penstemon blooms in the spring while the very similar inflated penstemon blooms in late summer. As a result, hybrids are rarely encountered.
Complete question:
Categorize the following situation as either a pre- or postzygotic isolating mechanism and then specify which type of pre- or postzygotic isolating mechanism it is.
A short hike through the Sandia Mountains from early spring to late summer will often reveal several different species of penstemon. The Rocky Mountain Penstemon blooms in the spring while the very similar inflated penstemon blooms in late summer. As a result, hybrids are rarely encountered.
Answer:
pre-zygotic isolating mechanismType: seasonal or temporalExplanation:
There are different mechanisms of reproductive isolation. These are barriers that inhibit or interrupt the genetic flux between different species. These mechanisms are about the biological characters of each species that prevent the reproduction with other species.
The reproductive isolation mechanisms might be either prezygotic or postzygotic.
Pre-copulatory or pre-zygotic: Ecological or due to habitat isolation; seasonal or temporal; Sexual or ethologic; Mechanical; Gamete incompatibility.2. Post-copulatory o post-zygotic:
Hybrid inviabilityHybrid sterilityHybrid with diminished viability and or fertilityCytoplasmatic interactions.The exposed situation is an example of prezygotic isolation due to seasonal or temporal barriers. Penstemon blooms in the spring, while the very similar inflated penstemon blooms in late summer. Probably, if they had the same reproductive season, they would produce hybrids. But as they are isolated by different reproductive seasons, they do not. As they can not even fertilize, they are considered to be prezygotic isolated species.
In Gregor Mendel's study with the color or peas, which ones were dominant and which ones were recessive?
Answer:
The peas with the purple flowers were dominant and the peas with the white flowers were recessive.
Explanation:
In Gregor Mendel's study, he studied pea plants with purple flowers and white flowers. The purple flowers were dominant, and whenever the allele for a purple flower was present is was visible on the plant. The white flowers were recessive because if an allele for a purple flower was present, then the flower was purple. The flowers were only white if both alleles were for white flowers.
Why are sex-linked disorders
more common in males?
A. Sex-linked disorders are more common in
females.
B. Males only need to inherit one copy of the
allele.
C. Sex-linked disorders are dominant.
Answer: B
Explanation:
Sex linked disorders are on the X chromosome and males have only 1
It is less common in females because they have 2 X chromosomes
Answer: B
Explanation: Men only have to inherit one copy of the disorder in order to have it since they’re XY and females are XX. With females, they could get another dominate trait to prevent them from having the disorder (they would then be a carrier) but with males there’s not any way to block it out.
PLEASE HELP ME!!!:(
Procedure:
1. Hold the ruler horizontally at both ends. Bend
the ruler.
Q1: Do you feel the ends of the ruler pushing
against your hands?
2. Now release the ruler.
Q2: What will happen to the ruler as you
release it?
3. Now, hold one end of the ruler firmly with your right hand and bend the ruler
again with your left hand.
Q3: What was stored as you bent the ruler using your left hand?
4. While keeping a tight grip with your right hand, take away your left hand
quickly
Q4: What will happen to the ruler as you take away your left hand
quickly?
:)( :>
Answer:
YES
Explanation:
A RULER HAS TWO ENDS THAT'S WHY IF YOU HOLD IT ON BOTH SIDES YOU CAN FEEL THE ENDS OF THE RULER PUSHING AGAINST YOU HANDS
WILL GIVE BRAINLIEST IF RIGHT
Geologic processes such as—————
help expose fossils once buried.
A) tsunami
B) blizzards
C) Earthquakes
D) Volcanic eruptions
Answer:
The answer is C ( earthquakes)
7. If the diameter of the field of view when using the 4x objective is 3 mm, what is the area of the field of view when using the 4X, 10X, and 40X objectives
Answer:
Using 4X view =
1.767 x 4 = 7.068mm
Using 10X view
1.767 x 10 = 17.67mm
Using 40X view
1.767 x 40 = 70.68mm.
Explanation:
If the diameter when using 4x objective = 3mm
then the original diameter = 3/4 = 0.75 mm
The diameter of the field is 0.75 mm
Area of a circle = pie/4 x diameter square
pie = 22/7 or 3.14
diameter = 0.75
The area of the field
3.14 x 0.75 2 =
3.14 x 0.5625=
1.767mm.
The original area of the field = 1.767mm
Using 4X view =
1.767 x 4 = 7.068mm
Using 10X view
1.767 x 10 = 17.67mm
Using 40X view
1.767 x 40 = 70.68mm.
Why is producer important in an ecosystems?
1. The St. Lucie River drains Lake Okeechobee into the Atlantic Ocean.
What is the relationship among the parts of this system?
Answer:
The St Lucie canal serves as an outlet of drainage for the Okeechobee Lake through the St Lucie River and out to the Atlantic Ocean.
Explanation:
The St. Lucie River is an estuary in Florida, in the United States. It was basically a freshwater system before an inlet was dug to provide access directly to the Atlantic Ocean.
Lake Okeechobee is the second largest freshwater lake in the United States. Water flows into the lake from various sources with Kissimmee River being the major source.
Because of the high levels of water in Lake Okeechobee, the St. Lucie canal was constructed in the 1920s. The St. Lucie canal provides a good outlet from the Okeechobee lake, through the St. Lucie River and out to the Atlantic Ocean.
The diagram shows the general structure of a lipid, which consists of two main parts.
A carbon atom is double-bonded to an oxygen atom and single bonded to a hydroxyl group.
Which part is circled?
Answer:
c-Carboxyl group
Explanation:on edg
Answer:
C
Explanation:
Under what conditions would you expect to see a full moon?
Answer:
when the Moon has moved in its orbit so that Earth is “between” the Moon and the Sun.
Explanation:
Sedimentary rocks with ripple marks suggest that the rocks formed
A. someplace where wind crossed over wet sediment while it was forming.
B. when an ancient animal swam over them.
C. from shell fragments of ancient sea-dwelling animals.
D. when wet mud dried and shrank.
Answer: A
Explanation: Ripple marks are sedimentary structures and indicate agitation by water (current or waves) or wind.
I understand what earth outer layer is made of underneath the water and soil on the surface
Yes
Or
Not yet
Explain
The planet earth being a terrestrial planet is made up of rocks and hard rigid slabs of rocks called plates. These plates float on the flexible (asthenosphere) Mantel.
I understand that earth is a rocks planet and is made up of rocks and these rocks are called plates.
This uppermost layer or the crust of the lithosphere is composed of SIAL that is rocks made from aluminum and silicon, oxygen components. The layer lying below this is made from the semi-fluid matter called as upper mantel that is the asthenosphere which is partly molten and is said as molten rock. Due to the less dynamicity of this layer the above crust floats or drifts.Hence the water and soil in the lithosphere are characteristic of the crustal rocks.
brainly.com/question/21338656.
¿En cuál de los siguientes alimentos es posible encontrar una mayor cantidad de proteínas? A. Pera. B. Agua. C. Carne. D. Mantequilla.
Answer:
C. Carne
Explanation:
La proteínas representan un macronutriente (al igual que lípidos y carbohidratos) fundamental para el organismo. El consumo de proteínas es clave en la dieta porque el organismo utiliza estas moléculas (o sus bloques de construcción, los aminoácidos) para construir diferentes estructuras celulares y llevar a cabo diversos procesos vitales tales como, por ejemplo, reparar y desarrollar tejidos, funciones endócrinas, defender al organismo de agentes patógenos infecciosos, etc. En un adulto, la ingesta diaria de proteína debe rondar del 15 al 35% del total de las calorías consumidas al día, lo cual representa aproximadamente de 0.8 a 1.3 gramos por cada kilogramo de peso corporal. La carne es un alimento que aporta un gran contenido de proteínas y también es fuente de vitaminas y minerales (es decir, micronutrientes). Otros alimentos ricos en proteínas incluyen, por ejemplo, huevos, leche, legumbres (arvejas, garbanzos, lentejas) y la soja.
Please help will mark brainpower pic below
Answer:
The use of sunlight to make food :)
Answer:
The use of sunlight to make food.
In an ocean ecosystem, dead organisms such as fish and plankton sink to the bottom of the ocean. Which organisms break down and recycle the dead organisms?
A. algae
B. bacteria
C. mollusks
D. sponges
Which stage of the cell cycle lasts longest?
Answer: i think the Interphase because
Interphase is the longest part of the cell cycle. This is when the cell grows and copies its DNA before moving into mitosis. During mitosis, chromosomes will align, separate, and move into new daughter cells. The prefix inter- means between, so interphase takes place between one mitotic (M) phase and the next.
Explanation:
hope this helps have a nice day ❤️❤️❤️❤️
Answer:
Metaphase
Explanation:
hope this helps!!!
Where does oxygen enters first
Answer:
assuming we're talking about the human biology oxygen enters the lungs first then passes through the alveoli and into the blood. Which is then transferred to the heart.
Explanation:
Help please I’ll give brainly
Compare and contrast and define the following:
Autotrophic/Heterotrophic
Help a sister outtt
Answer:
Autotrophs are organisms that prepare their own food through the process of photosynthesis,
heterotrophs are organisms that cannot prepare their own food and depend upon autotrophs for nutrition.
Explanation:
A large amount of sediment is deposited on a plain in a short amount of geologic time. what could happen to the ground/crust where it is deposited? why?
Answer:
The crust subsides due to the weight of the sediment that accumulates.
Explanation:
Water is a renewable resource that is constantly generated through the water cycle. The ocean contains most of the Earth's available water, but it is undrinkable because it contains salt. All but one of the reasons listed are reasons why desalination is not a popular option to have clean, drinkable water. it is expensive to desalinate water. B It could possibly affect the marine ecosystems. Transporting the water to water scarce regions is difficult. D) Since evaporation is involved in deselination, the drinking water is too hot for consumption.
Answer:
water
Explanation:
water because sory i am bored i dont have any thing to do
Answer:
D) Since evaporation is involved in desalination, the drinking water is too hot for consumptionn.
define the following :
parasite :
An organism that lives in or on another organism and gets its food from or at the expense of its host
Answer:
an organism that lives in or on an organism of another species (its host) and benefits by deriving nutrients at the other's expense.
Enzymes catalyze chemical reactions in the human body. Which statement best describes how enzymes work?
A They speed up chemical reactions by increasing the activation energy.
B They slow down chemical reactions by increasing the activation energy.
C They speed up chemical reactions by lowering the activation energy.
D They slow down chemical reactions by lowering the activation energy.
Answer:
A
Explanation:
Hope this is helpful!!:)
Enzymes work by speeding up chemical reactions through the lowering of the activation energy of the reactants.
In every reaction, reactants need to summon a minimum energy amount before they can get to products. this energy is referred to as activation energy.
When an enzyme is introduced into a reaction, it lowers the activation energy. By doing so, reactants can get to products quicker because the mountain they need to climb has been lowered by the enzyme.
In other words, enzymes create a shorter route for reactants to take towards their destination - products.
More on how enzymes work can be found here: https://brainly.com/question/13146523
need help will give brainlist
Answer:
A. Producer, Consumer, Predator, Decomposer
Explanation:
lol you selected the right answer. Thank you !!
Answer:
i don't know probably A
Explanation:
...