Fossils show that ancient horses had shorter legs than modern horses. What is most likely responsible for the evolution of long legs in the horse species?Immersive Reader
(5 Points)
The horses’ legs stretched because humans started to ride on horses.
The horses began to eat different foods, which made their leg bones grow longer.
The horses’ legs stretched because the horses started to run faster than ancient horses.
The horses born with longer legs were more likely to survive and reproduce.
The last one. Horses evolved and adapted to the new environment which is why they're legs grew longer
The barred owl has been moving into the habitat of the spotted owl. This could lead to a reduction in the spotted owl population if what?
Answer: If there is competition for food and nesting areas.
Explanation: Barred owls and spotted owls are well known as rivals. Barred owls are known to be aggressive towards spotted owls and are both bigger and more aggressive than them.
What is osmosis and give an example
Answer:
An example of osmosis is slowly learning how to sew after sitting next to an experience seamstress. ... An example of osmosis is when red blood cells, which have a high concentration of protein and salt, are placed in a lower concentration fluid like water, the water will rush into the red blood cells.
Explanation:
What process can occur between non-homologous chromosomes while in the tetrad configuration?
Explain why the blue color of starch-iodine complex disappears upon heating?
Answer: Starch is a long polymer molecule in one shape of a coil. The iodine molecules goes inside of the coil and this is what makes it turn blue/black. Iodine is a diatomic element with the formula, I2.
Explanation:
Answer:
This is because the compound of iodine and starch is unstable, but if you put the test tube in cold water, a dark blue sediment will form once more. When starch is heated to boiling point, it begins to break down, and the chains of amyloses break, thus, forming short chains of dextrins, so the colour starts to change.
Explanation:
PLEASE HELP QUICK!
wut is a population, refering to one in an ecosystem? pls give examples
Answer:
It's the quantity of a living organism inside that ecosystem. Like saying the snake population is 4 million in the Desert and such
Scientists can use mutants to study metabolic pathways. These organisms have a mutation in a gene encoding a metabolic pathway enzyme that results in the inactivation of that enzyme. Saccharomyces cerevisiae (a yeast species) mutants are available that grow on fructose, but not glucose. This growth defect results from a mutation in the gene encoding what enzyme?
Answer:
jlgd7trus576s6rdyird
Explanation:
just a little help!
Answer:
Its C
Explanation:
Twins mostly share the same genes and genes can't mutate after birth
I’ll mark u as brainliest!
Answer:
1. The cells grew because of cell division. (One cell doubles by two)
2. The G stands for Growth
3. Circle the little purple things
osmatic presure example ......................?
Answer:
The correct answer is - raising in water becomes puffed, or uptake of water and minerals from roots.
Explanation:
The minimum pressure applied to a solution to prevent the entering the flow of its pure solvent through q semipermeable membrane. The process of flowing the pure solvent to the solution through a semipermeable pressure is known as osmosis and the minimum pressure required to preventing the osmosis is osmotic pressure.
Many plants springing up through tree roots growing through concrete. Due to osmotic pressure, the plants grow they require more water, the inexorable osmotic pressure of water moves through the membranes can actually push through asphalt!
Movement of salt-water in the animal cell across our cell membrane and keep raisin in water and the raisin gets puffed are other examples of this phenomenon.
assume that life on Mars requires cell potential to be 100mV, and the extracellular concentrations of the three major species are following (mmol/L): Na : 145; K : 4; Cl- : 120. Choose one species and assume that other two probabilities are zero. Design the cell by calculating the intracellular concentration of the chosen species.
Answer:
Explanation:
From the information given:
The cell potential on mars E = + 100 mV
By using Goldman's equation:
[tex]E_m = \dfrac{RT}{zF}In \Big (\dfrac{P_K[K^+]_{out}+P_{Na}[Na^+]_{out}+P_{Cl}[Cl^-]_{out} }{P_K[K^+]_{in}+P_{Na}[Na^+]_{in}+ P_{Cl}[Cl^-]_{in}} \Big )[/tex]
Let's take a look at the impermeable cell with respect to two species;
and the two species be Na⁺ and Cl⁻
[tex]E_m = \dfrac{RT}{zF} In \dfrac{[K^+]_{out}}{[K^+]_{in}}[/tex]
where;
z = ionic charge on the species = + 1
F = faraday constant
∴
[tex]100 \times 10^{-3} = \Big (\dfrac{8.314 \times 298}{1\times 96485} \Big) \mathtt{In} \Big ( \dfrac{4}{[K^+]_{in}} \Big)[/tex]
[tex]100 \times 10^{-3} = 0.0257 \Big ( \dfrac{4}{[K^+]_{in}} \Big)[/tex]
[tex]3.981= \mathtt{In} \Big ( \dfrac{4}{[K^+]_{in}} \Big)[/tex]
[tex]exp ( 3.981) = \dfrac{4}{[K^+]_{in}} \\ \\ 53.57 = \dfrac{4}{[K^+]_{in}}[/tex]
[tex][K^+]_{in} = \dfrac{4}{53.57}[/tex]
[tex][K^+]_{in} = 0.0476[/tex]
For [Cl⁻]:
[tex]100 \times 10^{-3} = -0.0257 \ \mathtt{In} \Big ( \dfrac{120}{[Cl^-]_{in}} \Big)[/tex]
[tex]-3.981 = \ \mathtt{In} \Big ( \dfrac{120}{[Cl^-]_{in}} \Big)[/tex]
[tex]0.01867 = \dfrac{120}{[Cl^-]_{in}}[/tex]
[tex][Cl^-]_{in} = \dfrac{120}{0.01867}[/tex]
[tex][Cl^-]_{in} =6427.4[/tex]
For [Na⁺]:
[tex]100 \times 10^{-3} = 0.0257 \Big ( \dfrac{145}{[Na^+]_{in}} \Big)[/tex]
[tex]53.57= \Big ( \dfrac{145}{[Na^+]_{in}} \Big)[/tex]
[tex][Na^+]_{in}= 2.70[/tex]
Planting large numbers of trees would result in —
A
an increase in oxygen production
B
a decrease in oxygen production
C.
an increase in carbon dioxide production
D
a decrease in carbon dioxide production
what would happen if the fish didn’t have a bladder
Answer:
die because bladder is really important to
which animal have blue blood
Octopus... I guess_________!!!!!
Answer:
octopus
Explanation:
the blue blood comes from a copper-rich in protein called hemocyanin
What does a DNA repair mutation cause in the Cell cycle?
Answer:
Mutation rates increase substantially in cells defective in DNA mismatch repair or in homologous recombinational repair (HRR). Chromosomal rearrangements and aneuploidy also increase in HRR defective cells. Higher levels of DNA damage not only cause increased mutation, but also cause increased epimutation.
Mitosis is the process of one cell splitting apart to form two cells.
True
False
______________________________
QUESTION 2.
Chromatin consists of long strands of material located within the nuclear membrane.
True
False
______________________________________
Question 3.
The process of producing new cells is called cell reproduction.
True
False
Answer:
Question 1: true! Question 2: true! Question 3: false
Explanation:
this might not sound like much, but I LOVE science! however i'm not 100 percent sure on question 2.
List the Earth’s 4 spheres and give 1 example from your Environment for 2 of the speres.
Answer:
read this
Earth's Spheres
Everything in Earth's system can be placed into one of four major subsystems: land, water, living things, or air. These four subsystems are called “spheres.” Specifically, they are the lithosphere (land), hydrosphere (water), biosphere (living things), and atmosphere (air). Each of these four spheres can be further divided into sub-spheres. To keep things simple in this course, there will be no distinction among the sub-spheres of any of the four major spheres.
Lithosphere - Land
The lithosphere contains all of the cold, hard solid land of the planet's crust (surface), the semi-solid land underneath the crust, and the liquid land near the center of the planet.* The surface of the lithosphere is very uneven (see image on right). There are high mountain ranges like the Rockies and Andes (shown in red), huge plains or flat areas like those in Texas, Iowa, and Brazil (shown in green), and deep valleys along the ocean floor (shown in blue).
The solid, semi-solid, and liquid land of the lithosphere form layers that are physically and chemically different. If someone were to cut through Earth to its center, these layers would be revealed like the layers of an onion (see right image above). The outermost layer of the lithosphere consists of loose soil rich in nutrients, oxygen, and silicon. Beneath that layer lies a very thin, solid crust of oxygen and silicon. Next is a thick, semi-solid mantle of oxygen, silicon, iron, and magnesium. Below that is a liquid outer core of nickel and iron. At the center of Earth is a solid inner core of nickel and iron.
* Note: The word "lithosphere" can take on different meanings depending on the speaker and the audience. For example, many geologists--scientists who study the geologic formations of Earth--reserve the word "lithosphere" to mean only the cold, hard surface of Earth, not the entire inside of the planet. For the purpose of this course, however, there will be no distinction among the various layers of land. The word "lithosphere" will be used in reference to all land in Earth's system.
Hydrosphere - Water
The hydrosphere contains all the solid, liquid, and gaseous water of the planet.** It ranges from 10 to 20 kilometers in thickness. The hydrosphere extends from Earth's surface downward several kilometers into the lithosphere and upward about 12 kilometers into the atmosphere.
A small portion of the water in the hydrosphere is fresh (non-salty). This water flows as precipitation from the atmosphere down to Earth's surface, as rivers and streams along Earth's surface, and as groundwater beneath Earth's surface. Most of Earth's fresh water, however, is frozen.
Ninety-seven percent of Earth's water is salty. The salty water collects in deep valleys along Earth's surface. These large collections of salty water are referred to as oceans. The image above depicts the different temperatures one would find on oceans' surfaces. Water near the poles is very cold (shown in dark purple), while water near the equator is very warm (shown in light blue). The differences in temperature cause water to change physical states. Extremely low temperatures like those found at the poles cause water to freeze into a solid such as a polar icecap, a glacier, or an iceberg. Extremely high temperatures like those found at the equator cause water to evaporate into a gas.
** Note: Some scientists place frozen water--glaciers, icecaps, and icebergs--in its own sphere called the "cryosphere." For the purpose of this course, however, frozen water will be included as part of the hydrosphere. The word "hydrosphere" will be used in reference to all water in Earth's system.
Biosphere - Living Things
The biosphere contains all the planet's living things. This sphere includes all of the microorganisms, plants, and animals of Earth.***
Within the biosphere, living things form ecological communities based on the physical surroundings of an area. These communities are referred to as biomes. Deserts, grasslands, and tropical rainforests are three of the many types of biomes that exist within the biosphere.
help pleaseee
give an example of lamarcks theory of evolution:
why are we still here? just to suffer
Answer:
and We were born just to die
Answer:
Explanation:
every night I can feel my leg and arm
how do scientist classify animals
Which of the following describes a structure that both prokaryotic and eukaryotic cells have in common? (2 points)
This membrane-bound organelle encloses the cell's DNA and is where DNA replication occurs.
This organelle is composed of a stack of membrane sacs where proteins are modified and stored.
This organelle extracts energy stored in glucose molecules to power cell functions.
This organelle is composed of protein and RNA and is used to make proteins for the cell.
Answer:
The correct answer would be A)This organelle is composed of protein and RNA and is used to make proteins for the cell. A ribosome is a vesicular structure present in both prokaryotic and eukaryotic cells. ... They are the site of translation in both prokaryotic and eukaryotic cells.
Explanation:
Which of these statements is correct about material 1 and 2?
The half-lives of Material 1 and Material 2 are same.
The half-life of Material 2 is one-fourth of the half-life of Material 1.
The half-life of Material 2 is 5 years more than the half-life of Material 1.
The half-life of Material 1 is 5 years more than the half-life of Material 2.
Answer:
D. The half-life of Material 1 is 5 years more than the half-life of Material 2.
Explanation:
As you can see in the graphs for material 1 to get to 50% it takes 30 years. for material 2 it takes 25 years to get to 50%. Therefor the halflife of material 1 is 5 years more than material 2
which of the following is true regarding hypertension and the loss of elastin?
If the arteries become less stretchy, the heart will have to work harder to eject blood.
Asha crushed some purple berries from a bush and mixed them with a little water. When she mixed the juice with some wet washing powder, the colour changed to red. She said, "this proves that berries are an indicator and the washing powder is an alkali." Is Asha correct? Explain your answer.
Answer:
Yes Asha is correct because when she mixed the purple berry with water into the chemical it changed color.
Explanation:
Which of the following is an example of cohesion?
water attracted to the side of a glass tube
water droplets attached to a spider web
water forming raindrops
hydrogen bonding
Answer:
I would think it's A sorry if this was wrong
Explanation:
explain how the ability to manage intrapersonal conflict may help you deal better with interpersonal conflict amongst your friends
Answer:
How many patients had allergies or ear infections, but not both?
24
27
36
40 answer
Explanation:
There are millions of organisms on Earth that scientists have classified into different levels of organization. Which of these characteristics would be most
Important to scientists when classifying organisms?
where the organism lives
how small the organism is
the genes of the organism
the shape of the organism
Previous
Pau
5.50
A
14
3
$
4
backspace
5
6
7
8
o
Answer:
A
Explanation:
multiply 5.50 and you know X $50
What is the difference between global effects and local effects.
Answer:
golbal means around the world but local means next to you
Answer:
A global effect generally affects, as the term implies, the world as a whole, or at least a major part of the world, while a local effect would be just in a distinctive area.
For example, if the world is heating up due to CO2 emissions, it heats up in an global effect, resulting in the median temperature rising in all areas of the world. However, the world heating up may only mean a drought in distinctive areas that are typically already leaning towards the drier side (local effect), while the others receive a greater than usual volume of water due to rising temperatures.
~
What should the student do after he has collected and analyzed his data?
Write a lab report that summarizes his experiment
0 Share his results with his class and ask for their feedback
O
Remove all data that do not support his conclusions,
Based on scientific methods
Answer:
Write a lab report that summarizes his experiment
A wooded area experienced an extreme drought after years of very little rainfall. What was the most likely effect of the drought on this ecosystem?
A. Populations of soil organisms increased as the amount of water in the soil decreased.
B. Populations of herbivores increased due to the increased vegetation available for them to eat.
C. Populations of plants that require very little water decreased more than those that need a lot of water.
D. Populations of both trees and shrubs decreased due to the increased competition for water.
Answer:
D. Populations of both trees and shrubs decreased due to the increased competition for water.
Explanation:
if both of the trees are competing for water both of them will decrease bc they will both take water from each other causing both of the trees to die.