Explanation:
Eukaryotic cells are held together by a plasma membrane.
Eukaryotes have many cell parts called organelles and those organelles help you survive.
Sometimes a cell wall will surround a membrane.
Which genetic variation within a population of jackrabbits would most likely aid in that individual's survival if predation in
the area suddenly increased?
A) Stronger hind-leg muscles
B) Shorter reproductive cycles
C) Better disease resistance
D) A heavier fur coat
Stronger hind-leg muscles would most likely aid in an individual jackrabbit's survival if predation in the area suddenly increased. Therefore, option (A) is correct.
What is hind leg muscle?Stronger hind-leg muscles would allow a jackrabbit to run faster and jump higher, which would increase its chances of escaping from predators. This trait would be particularly advantageous in an environment where predators are abundant and pose a significant threat to the survival of the population.
Shorter reproductive cycles and better disease resistance may also be beneficial in some circumstances, but would not directly aid in escaping predation. A heavier fur coat may be advantageous in colder environments, but would not necessarily improve an individual's chances of escaping predation.
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Which system creates blood cells?
blank system
Answer:
Red blood cells are formed in the red bone marrow of bones. Stem cells in the red bone marrow called hemocytoblasts give rise to all of the formed elements in blood.
Answer:
Skeletal System
Explanation:
To be specific, red blood cells, white blood cells, and platelets are produced in the bone marrow
Hope this helps :)
why genetically modified crop is over advantages thanbreeding
define please
Answer:
Genetically Modified (GM) crops
Explanation:
Why Genetically modified crops are more beneficial?
Genetic engineering provides a quicker and more precise way to achieve the same goal, in one generation rather than twenty. Genetically Modified (GM) crops offer improved yields, enhanced nutritional value, longer shelf life, and resistance to drought, frost, or insect pests.
Give five examples of transfer of energy situations. (HINT: a wind turbine transforms kinetic energy into electrical energy.) [HELP ME PLEASE] I'LL MARK THE BRAINILEST!!!
Explanation:
1. A boat being accelerated by the force of the engine
2.Bringing water to the boil in an electric kettle
3. A toaster transforms electrical energy into thermal energy.
4. A blender transforms electrical energy into mechanical energy.
5. Our bodies convert chemical energy from food into mechanical and electrical energy to allow us to move.
why do we need energy
Answer: if human enegrgy, to survive and power our muscles. if electrical energy, because we need it to cook and everything else
Answer:
Explanation:
Without energy you wont be able to do anything. You wont even be able to move. Energy fuels your body's internal functions, repairs, builds and maintains cells
What is used when making bio-pharmaceuticals?
A. dead organisms
B. living cells
C. preexisting drugs
D. bio-engineered organisms
Answer:
C.
Explanation:
The difference between biopharmaceuticals and traditional pharmaceuticals is that they are not made by chemists in laboratories but by using bioreactors and living organisms. These organisms range from yeast or microbes all the way to mammalian cells. Biopharmaceuticals also called biologics are shedding new light on fighting cancer.
what is the difference between a mollusk and an annelid?
Answer:
Segmented worms vs invertebrates
Explanation:
Mollusks are invertebrates such as snails, scallops, and squids. Different classes of mollusks have different ways of obtaining food. Annelids are segmented worms such as earthworms and leeches. Annelids have a coelom, closed circulatory system, excretory system, and complete digestive system.
Adaptation through natural selection is limited because it requires
O the absence of mutations
O slow rates of reproduction
O low genetic diversity
O genetic traits to exist in a gene pool
O traits that cannot be inherited
Answer:
genetic traits to exist in a gene pool
Explanation:
Adaptation through natural selection is limited because it requires that the genetic traits must have existed in the gene pool.
Natural selection only acts on the existing gene pool and selects for adaptive genes, not that it creates new genes. Hence, for a population to be able to adapt to a particular change in the environment, the adaptive genes must have been present in the gene pool of the population. This, thus, makes adaptation through natural selection to be limited.
In a recent experiment, anti-bacterial hand sanitizer was compared to hand soap. Students washed their hands using the sanitizer or soap and warm water for two minutes; then they dried their hands with a paper towel. The standard of comparison was rubbing hands vigorously for 2 minutes in warm water, without any soap or sanitizer, and then drying with a paper towel. The sanitizer advertisement claimed to kill bacteria more effectively than any soap. After washing, hands were swabbed and then the swab applied to a culture plate and incubated. Finally, the bacterial cultures were counted. Students using the antibacterial santizer had the lowest bacterial culture count. What is the control in the experiment? A) washing with soap B) rubbing vigorously C) the time: two minutes D) rubbing hands in warm water
Answer:
The correct answer is - option D. rubbing hands in warm water.
Explanation:
The control group or the control is the variable or that is used in an experiment to check if the results are actually due to the experiment or to compare the result or effect of the experiment.
In this experiment, the independent variables are soap and the sanitizer and the dependent variable is the count of bacterial culture. To check the result or to compare the result that results are due to the experiment the control group is rubbing the hand vigorously in warm water.
name and desribe the chemical process producers use to the exchange.
Answer:
The process that is used by producers to make glucose is called photosynthesis and the chemical process used by both producers and consumers to make ATP it contribute to the energy exchange is called cellular respiration. And the name is Photosynthsis.
Explanation:
hope this helps!! <33
HELP PLS First, Demetri will test the three solutions containing milk (lactose).
He begins the experiment by preparing the lactase enzyme solutions. In one beaker he dissolves 1 lactase tablet in 100 mL of water at room temperature. He stirs the mixture until the tablet has dissolved completely. He repeats this process in a second beaker, and then heats the beaker until the solution is boiling.
Demetri then tests these three milk (lactose) solutions for the presence of glucose:
milk in water
milk and lactase enzyme in water
milk and heated lactase enzyme in water
Test Tube 1 - Milk (Lactose): Demetri fills the first test tube one-quarter full of milk. Then, he slowly adds water to the milk until the test tube is three-quarters full. Using the stirrer, Demetri thoroughly mixes the solution. Then he inserts the test strip for 30 seconds and records its color.
Test Tube 2 - Milk (Lactose) and Lactase Enzyme: Demetri fills the second test tube one-quarter full with milk. He then adds the lactase-and-water solution until the test tube is three-quarters full. He uses a stirrer to thoroughly mix the solution. Next, Demetri inserts the test strip for 30 seconds and records its color.
Test Tube 3 - Milk (Lactose) and Heated Lactase Enzyme: Demetri fills the third test tube one-quarter full with milk. He then adds the heated lactase-and-water solution until the test tube is three-quarters full. After stirring, Demetri inserts the test strip for 30 seconds and records its color.
According to the test strips, which of these milk solutions contained glucose?
Answer:
2nd test tube, because test strip color turned to green, which indicates this test tube solution contained glucose.
Explanation:
Lactase will break down the lactose into glucose and galactose. In first test tube there is no such activity because there is no lactase presented. In 3rd test tube as the enzyme is heated so it is get decomposed so in this case also there is no activity of lactase enzyme.
The second tube is the tube that contained glucose.
We can arrive at this answer because:
Lactase is a protein.This protein has the function of breaking lactose into smaller molecules, which are glucose and galactose molecules.This protein is sensitive to high temperatures and loses functionality in very hot environments.In the case of the tests used in the question above, we can say that in the first test tube, the lactase solution was not added, so the lactose was not broken down. The lactase solution was added to the second test tube, where the lactose was broken down generating glucose and galactose. In the third test tube, the heated water prevented the lactase from acting and therefore it cannot break down the lactose.
Therefore, only the second tube has glucose.
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A horse galloped at 40 km/hr, then it began to slow down. The horse slows down at 20km/hr. We know the kinetic energy of the horse (1 BLANK) by a factor of (2BLANK). The relationship between kinetic energy and speed is (3 BLANK).
1 blank: increased , decreased, or stayed the same
2 blank: 2x, 4x, 1/2x, 1/4x
3 blank: directly proportional, linear OR square, nonlinear
Answer:
decreased, 1/2x, linear
Explanation:
A horse galloped at 40 km/hr, then it began to slow down. The horse slows down at 20km/hr. We know the kinetic energy of the horse decreased by a factor of 1/2x. The relationship between kinetic energy and speed is linear.
What is average speed?The average speed has been defined as the total distance traveled by the object in a particular time interval. The average speed is a scalar quantity.
Kinetic energy has been defined as the energy of the object that occurs due to the motion of the object. The total work needed by the body to starts accelerating it by the help of given mass which has supplied from the rest position and its mentioned velocity.
The energy body gets due to the process of acceleration by this the body will able to main the kinetic energy of the body without changing the speed of the body. The energy which has been stored in the body or any object by the help of the particular position or the proper arrangement of the parts is known as potential energy.
There will be no effect of the outside environment on the potential energy that present inside the body. The kinetic energy decrease or increase with change in the velocity.
Therefore, A horse galloped at 40 km/hr, then it began to slow down. The horse slows down at 20km/hr. We know the kinetic energy of the horse decreased by a factor of 1/2x. The relationship between kinetic energy and speed is linear.
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A wooden block slides down a ramp that is 8 meters long in 2 seconds. What was the average speed of the wooden block?
A. 8 m/s
B. 4 m/s
C. 16 m/s
D. 10 m/s
Answer:
4 m/s.
Explanation:
Speed = distance/time
[GIVING BRANLIEST]
If a DNA strand has 26% cytosine, what percent thymine will each new strand have after replication?
Answer: Each new strand would have 24% thymine
Remember the base pairing rules: cytosine with guanine and adenine with thymine, in equal amounts. Since you know that there is 26% cytosine, the amount of guanine is also 26%. 26+26=52, so that means that 52% is cytosine and guanine collectively, which means that the remaining 48% is adenine and thymine. Since these are also equal, you could divide 48% between the two bases to get 24% each.
Hope this helps,
Lacia
Studies predict that precipitation in California will decrease by up to 15% over the next 20–30 years. Predict two ways that this change in water availability could affect resource availability in the area. Predict how this could affect human activity in the area. Suggest a change that could be made to adapt to or reduce the impacts.
Answer:
explanation
Explanation:
California is known to have limited water supply which comes from surface water and water that gathers on the ground, forming rivers, lakes and streams.
If the scientific predictions work as expected and the area loses nearly 15 percent of its water source, there would be the loss of agricultural resources.
Agriculture is one of the biggest industry in California and the state may have much limited water supply to grow their crops, feed their animals and for transportation.
The government can use improved technological methods to design reservoirs that can collect water during wet times and reduce evaporation during hot periods. Also, they can create a good network of aqueducts that would aid the right distribution of water across distances.
Adenine and Guanine will always pair together
True
False
Answer:
false
Explanation:
which of the following is designed to move or flex the leg and hoof in a rearward motion?
A. flexor tendon
B. extensor tendon
C. navicular bone
D. short pastern bone
Answer:
a
Explanation:
hpe that helps
Why are the palisade cells on the top of the leaf?
Palisade cells are present on the top of the leaf surface because they helps the leaf in maximizing the extent of light absorption through the leaves.
What are Palisade cells?
Palisade cells are the plant cells which are located on the upper surface of the leaves, right below the epidermis cells layer and the cuticle that is the outermost layer of the leaf in plants. In simpler terms, they are known as leaf cells.
The palisade mesophyll layer contains the largest per cell number of chloroplasts in the plant body. It is usually positioned towards the upper surface of the leaf of plants in order to harness the greatest amount of energy which is possible. Palisade cells are placed all over the top of a leaf surface, for maximizing the extent of light absorption through the leaves.
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What is most likely effect on the energy pyramid if all producers are removed from the ecosystem
A clownfish lives in a sea anemone. The anemone is not hurt , but the clownfish can live in its safety. This is an example of what symbiotic relationship?
Answer:
commensalism
Explanation:
Commensalism is a symbiotic relationship in which one species benefits while the other species is not affected.
Un carnera de lana negra se cruza con una oveja de lana blanca y tienen al menos un cordero de lana negra. El canero tiene las orejas largas y la oveja las tiene cortas. Sabiendo que el color de la lana sigue una herencia dominante para el color blanco y que esta especie puede tener las orejas Cortas, medianas o largas (herencia intermedia), deduce qué fenotipos se esperan en la F1 y su proporción. Cuadro de punnett necesito?
Answer:
Fenotipos de la F1: 50% de la progenie muestra orejas medianas y lana blanca, mientras que el otro 50% muestra orejas medianas y lana negra. En este caso en particular, el cuadro de Punnett no es necesario pero resulta de gran utilidad para visualizar la cruza.Explanation:
Datos disponibles:
El color de la lana sigue una herencia dominante para el color blancoEsta especie puede tener las orejas cortas, medianas o largasCruza: carnero de lana negra y orejas largas X oveja de lana blanca y orejas cortasProgenie: al menos un ejemplar con lana negraPodemos suponer que para el gen determinante del color de lana, el alelo dominante L determina lana blanca, mientas que el alelo recesivo l determina lana negra. También podemos suponer que para el gen que determina la longitud de las orejas, el genotipo LL expresa orejas largas, el genotipo Ll expresa orejas medianas, y ll expresa orejas cortas por tratarse de herencia intermedia. Entonces:
B--> Lana Blanca
b --> Lana Negra
LL --> Orejas largas
Ll --> Orejas medianas
ll --> Orejas cortas
Cruza: carnero de lana negra y orejas largas X oveja de lana blanca y orejas cortas
Puesto que en la progenie habia por lo menos un ejemplar con lana de color negro, podemos suponer que la oveja era heterozigota para la caracterítica en cuestión, ya que es la única forma de obtener un genotipo recesivo en la F1.
Parentales) bb LL x Bb ll
Gametos) bL, bL, bL, bL Bl, bl, Bl, bl
Cuadro de Punnet) Bl bl Bl bl
bL BbLl bbLl BbLl bbLl
bL BbLl bbLl BbLl bbLl
bL BbLl bbLl BbLl bbLl
bL BbLl bbLl BbLl bbLl
F1) Genotipo: 8/16 BbLl
8/16 bbLl
Fenotipo: 8/16 o 50% animales de lana blanca
8/16 o 50% animales de lana negra
16/16 o 100% animales de orejas medianas
Posiblemente no sea necesario utilizar un cuadro de Punnet con la cruza mencionada. Sabiendo los genotipos paterno y materno es posible determinar las proporciones fenotipicas de la F1 sin realizar el cuadro de Punnet.
Para longitud de orejas se puede deducir que todos los ejemplares en la F1 serian heterocigotos, expresando orejas medianas. Esto se debe a que la cruza ocurre entre un homocigota dominante y un homocigota recesivo para esta característica.En tanto que para la caracteristica del color de lana se podria asumir que la mitad sería blanca y la otra mitad negra, puesto que la cruza es entre un homocigota recesivo y un heterocigota.Aun así, mientras haya pocos genes dialélicos involucrados en la cruza, el uso del cuadro de Punnet siempre resulta útil para una mejor visualización de la cruza.
What type of monomer is used to form a dipeptide during protein synthesis
Answer:
Amino acids
Explanation:
Amino acids are the building blocks of proteins. If two amino acids are joined together it will make a dipeptide.
The four main types of macromolecules found in organisms are proteins, lipids, carbohydrates and ____.
a. monosaccharides
b. nucleic acids
c. fatty acids
d. starches
Answer:
b. nucleic acids
Explanation:
What happens to oxygen, glucose, and amino acid molecules in a healthy person?
Answer:
Oxygen plays a very important role in our body, oxygen along with nutrients from the food to create Adenosine triphosphate, which is used as a fuel for cell functions. Glucose is the main source of energy for cells and organs of body. The stored form of glucose is called glycogen. Amino acids play an important role in metabolic pathway, gene expression. They are they building blocks of proteins and make up 75% of the body.Which of the following adaptations is characteristic of animals in the alpine biome?
a.
seasonal color change
b.
insulating feathers
c.
large paws
d.
large lungs
Answer:
Answer Is D :)
Explanation:
Answer:
D. Large Lungs
Explanation:
Drag the tiles to the correct boxes to complete the pairs.
Match the vestigial organs to their probable use in other organisms.
tailbone in humans
eyeballs in cavefish
pelvis bone in whales
sight in whales
balance in monkeys
attachment point for limbs in frogs
Answer:
1) tailbones in humans
B. Balance in monkeys
2) eyeballs in cavefish
A. Sight in whales
3) pelvis bone in whales
C. Attachment point for limbs in frogs
Vestigial organs like tail bones in humans are equivalent to the balance in the monkey, eyeballs in cavefish to the sight in whales, and pelvis bones to the attachment. Thus, the correct options are 1. b, 2. a, and 3. c.
What are vestigial organs?The tissues and cells define vestigial organs, that was inherited from the ancestors but now do not have a specific purpose in the organism and are considered non-functional.
The tail bones in humans or the coccyx that were inherited from the common ancestor of the mammalian group are non-functional but in monkeys provide balance. Hence, option b is correct.
The eyeballs in cavefish are considered non-functional as they live in dark oceanic parts, on the other hand, these eyes are used as sight in whales. Hence, option a is correct.
The pelvis bones in whales are vestigial organs as they do not walk or jump, unlike the frogs with pelvis bones as the attachment joint. Hence, option c is correct.
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Which process produces the largest amount of energy given off by stars?
- nuclear Fusion of lighter elements into heavier elements
- muleteer of heavier elements into lighter elements
- radioactive decay of lighter elements into heavier elements
- radioactive decay of heavier elements into lighter elements
please I need this ASAP
Answer:
A
Explanation:
Nuclear Fusion of lighter elements into heavier elements is the process produces the largest amount of energy given off by stars. Thus option A is correct.
What is Nuclear fusion ?Nuclear fusion is process where two or more atomic nuclei fuse together and form a single heavier nucleus, here the matter is not conserved and the mass of the fusing nuclei is converted to energy.
When deuterium and tritium fuse together and form helium atom, fast neutron, the remaining extra mass is transformed into kinetic energy.
The participating nuclei should be brought together by a nuclear forces which become active and glue to the nuclei together, it shows no pollution effect with less nuclear waste.
The nuclear fusion energy used to clean and produces a minimum amount of nuclear waste compared to nuclear fission reactions and the fuel for fusion, Deuterium, and Tritium are available in nature, viable alternative power source in the coming centuries.
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Which biomolecule is most responsible for determining a person's eye
color?
Lipids
Proteins
Nucleic Acids
Carbohydrates
Activation energy is the energy required to
a. complete a chemical reaction.
b. start a chemical reaction.
c. produce a catalyst.
d. produce the reactants.
Answer:
b
Explanation:
Have a great day!
Activation energy is the energy required for a reaction to proceed, and it is lower if the reaction is catalyzed.
HELP PLS AND THANK YOU. ILL MARK YOU BRAINLIEST.
How does the probability of success of fertilizations change from predators? (specifically fish fertilizations and predators like turtles)
Answer:
It depends largely on environment!
Explanation:
External fertilization usually occurs in aquatic environments (fish) where both eggs and sperm are released into the water. After the sperm reaches the egg, fertilization can then take place. Most external fertilization happens during the process of spawning where one or several females release their eggs and the male(s) release sperm in the same area, at the same time. The release of the reproductive material may be triggered by water temperature or the length of daylight. Nearly all fish spawn, as do crustaceans (such as crabs and shrimp), mollusks (such as oysters), squid, and echinoderms (such as sea urchins and sea cucumbers). Pairs of fish that are not broadcast spawners may exhibit courtship behavior. This allows the female to select a particular male. The trigger for egg and sperm release (spawning) causes the egg and sperm to be placed in a small area, enhancing the possibility of fertilization.
When it comes to spawning, where large clutches of eggs will be fertilized at the same time it increases the probability of survival amongst the eggs, only by sheer force of numbers. If fish only fertilized small clutches there would be little to no survivors due to predator's population. Because of predators like Turtles, a lake with little predator's (turtles) will have a higher chance of egg survival rate. On the other hand, Lakes and ponds will have A lower survival rate for egg clutches with more predator's, like turtles.
Hope this helps! let me know in the comments if I need to answer any other parts of this prompt, I would be happy too.