Answer:
derived trait
Explanation:
An ancestral (or primitive) trait/character is a feature inherited from the common ancestor of the species/group of interest, while derived traits are those that were absent in the last common ancestor of the group of interest. For example, considering mammals as the target group, the presence of hair is a shared derived trait relative to other vertebrates, i.e., amphibians, reptiles and birds. However, this trait (hair) is ancestral for humans since the genetically closest species to humans (e.g., chimpanzees), also have hair, and they have inherited this trait from a common ancestor.
The presence of hair in mammals is said to be a derived trait among all
animals.
Mammals generally have hairs which is one of their major
characteristics.Animals such as amphibians and reptiles were in existence
before mammals and they had no hair present on their body.
As time went on, changes started to occur as a means to adapt to the living
conditions which gave rise to the development of hairs in mammals and is
the reason why it is a derived trait.
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Question 4 of 25
What kind of molecule forms from polysaccharide chains that are very
strong?
O A. Protein
B. Cellulose
C. Monosaccharide
D. Lipid
SUBMIT
PREVIOUS
Answer:
B. Cellulose
Explanation:
Polysaccharide are substances that contains many units of monomers called MONOSACCHARIDE. They are carbohydrate molecules consisting of very long chains of monosaccharides like glucose, galactose etc.
An example of molecule that forms from strong chains of polysaccharides is CELLULOSE, which consists of long chains of glucose units linked together by B-1,4-glycosidic bonds. Cellulose is the most abundant polysaccharide on Earth found in plant cell walls.
HELPPPPPPP PLEASEEEE!!!! HSIWOKJENQIHLNIODH(PQO:JMEKJl.n,fweb jlgk
What is the mass of a falling rock if it produces a force of 145N while accelerating at a rate of 5 m/s^2
Answer:
29 kg
Explanation:
I just did the math. My bad if it's wrong
homologous chromosomes move toward opposite poles of a dividing cell during ______.
Answer:
anaphase
Explanation:
A student wanted to test the effectiveness of a new type of drug that would partially block Ca2 channels on the sarcoplasmic reticulum. She had a population of 15 frogs and divided them into three groups: 5 frogs received 50mg of the drug, 5 frogs received 25mg of the drug and 5 frogs received a placebo. She isolated a muscle from each frog and measured how much force it exerted during a contraction. She also recorded the air temperature in laboratory because temperature could affect muscle proteins. What was her dependent variable
Answer:
This question is incomplete as it lacks options, the options are:
A. drug dose
B. type of drug
C. force of contraction
D. air temperature
The answer is C. Force of contraction
Explanation:
In an experiment, the DEPENDENT VARIABLE (effect) is the variable that responds to the changes made to the independent variable (cause). It is the variable that is measured as the independent variable is being manipulated in the experiment.
In this case, a student wanted to test the effectiveness of a new type of drug that would partially block Ca2 channels on the sarcoplasmic reticulum. She used a total of 15 frogs, which were divided into three groups and administered different doses of the drug (independent variable). However, the AMOUNT OF FORCE A MUSCLE EXERTED DURING CONTRACTION was measured. Hence, the dependent variable is the force of contraction of the muscle.
If a reaction in one direction releases energy, the reaction in the opposite direction
a.
also releases energy.
b.
absorbs energy
C. destroys energy
d.
cannot occur.
If a reaction in one direction releases energy, the reaction in the opposite direction ABSORB ENERGY (Option B)
All chemical reactions involve some type of transfer of energy.There are two types of chemical reactions: exothermic reactions and endothermic reactions.An exothermic reaction is a process that releases heat (i.e., releases energy), while an endothermic reaction requires an input of energy to proceed.In conclusion, if a reaction in releases energy, a reaction in opposite direction ABSORB ENERGY (Option B).
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what is the difference between the flowing water model and the flowing water on earth?
Answer:
Stream running down a mountain; the water flows over rocks and trees. ... river—complete the hydrologic cycle by returning precipitation that falls on land to the oceans
Explanation:
Answer:
Because the model flowing water is not real
Explanation:
give meh a crow Arghhhh
A zebra embryo is in the early stages of development the cells are beginning to look different from each other which statement is the best description of what is happening to the zebra embryo
Answer:
I think it is A,the cells are differentiating so that they have specialized functions. Because at one point different parts of embryo differentiate to create new different cells and that cells create new muscle cells like skeletal muscle, etc to create new organs.
Explanation:
Hey yall you don't know me but can someone help ill do anything
Answer:
D is the answer
Explanation:
cause if you make it illegal for them to be hunted the population will grow (it wouldn't let me send without the sentence being 20 characters sorry)
Which example listed below is not a population?
A. all the plant life in a meadow
B. all the red maple trees in a forest
C. all the Saguaro cacti in a desert
D. all the sunshine in a lake
Answer:
D. all the sunshine in a lake
1. Why do you have a dedicated circulation pathway for the spleen, stomach, pancreas, gallbladder, and intestines that passes through the liver
Answer:
Because the liver is a crucial organ that processes the nutrients that the blood carries. Also, we storage blood when the volume of it is above the normal levels.
Explanation:
The blood that circulates through the spleen, stomach, pancreas, gallbladder, and intestines has to pass through the liver. This organ will metabolize proteins, lipids, cholesterol, bilirubin, toxins, and steroid hormones, also store glycogen, fats, Ferrum, and vitamins, and produce bile. The nutrients that the blood carries are processed in the liver to keep the body healthy and to eliminate substances through bile. The bile will also help with the digestion of nutrients in the intestine.
When the blood from these organs (spleen, stomach, pancreas, gallbladder, and intestines) goes to the liver via the hepatic vein, the hepatic cells process it and deals with the functions previously mentioned. Once that blood is filtered, it goes to the hepatic veins, and from there, to the heart.
The liver and Spleen are the two primary organs of the body, through which blood circulates and purifies. The organs like the gall bladder, spleen, liver, and pancreas are involved in the circulation of blood.
The blood circulated between the organs like the spleen, stomach, intestine, and pancreas is sent to the liver.
The liver plays a crucial role in the metabolism of toxins, bilirubin, proteins, lipids, and cholesterol. Also, glycogen, hormones, and vitamins are also stored in the liver.
The nutrient-rich blood is present in the blood, which helps in maintaining the health and proper functioning of the body.
The blood from these organs is delivered by the hepatic vein to the liver, and the hepatocytes metabolize the nutrients. The blood once filtered and purified, is delivered to the heart via hepatic veins.
Thus, the blood circulation between the liver and other organs like the spleen and gall bladder is necessary to metabolize nutrients before sending them to the heart.
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why are the models of solar systems that you can purchase in stores not to scale?
Answer:
If they were to scale, it wouldn't fit on Earth since a lot of planets are much bigger than Earth
As the solar systems are around 287 billion kilometers across, the models of a solar system we can buy in stores are not accurate to size.
What is Solar system?The Sun and the asteroids that orbit it make up the gravitationally bound system is known as the Solar System. A massive interstellar molecular cloud gravitationally collapsed to make it 4.6 billion years ago. The Sun contains the great majority of the remaining mass, with Jupiter holding the lion's share of the remaining mass.
The Sun and the things that orbit it make up the Solar System. The Sun, our star, and everything gravitationally attracted to it, including planets like Earth, asteroids, meteors, comets, and many other objects, make up our solar system.
Thus, as the solar systems are around 287 billion kilometers across, the models of a solar system we can buy in stores are not accurate to size.
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Describe the nervous response pathway when you taste something bad and spit it out.
Answer:
you taste it and then you're brain says this is disgusting so then you spit it out
Explanation:
its simple science
Why is the cell membrane often called the plasma membrane?
Answer:
The plasma membrane, also called the cell membrane, is the membrane found in all cells that separate the interior of the cell from the outside environment.
Explanation:
A researcher had populations of three different breeds of cats. Each breed was supposed to be hypoallergenic and safe for people with cat allergies. To test this, she recruited people to play with the cats and she recorded how many times per minute people sneezed with while playing with each breed. In this experiment, the independent variable was ______, and she should present the data as a _____. Group of answer choices
Answer: Cat breed; bar graphs
Explanation:
The experiments consists of a dependent and independent variable. The independent variable can be change and is controlled by the experimenter and the dependent variable is dependent on the independent variable.
Here, in this experiment the independent variable is breed of cat. There are 3 different breeds of cats used in the experiment to test the sneezing frequency caused due to allergy from cats.
The data can be presented in the form of bar graphs with x and y representing the the dependent and independent variable.
Some scientific computer models predict that crop yields for corn and wheat, two food staples that provide for two thirds of the worlds calorie consumption, will decline due to global warming. Which of these is the least likely cause for crop production reduction as caused by climate change?
Answer:
its "D" I got it right.
Explanation:
put the answer choices, it's not hard
oxygen is a substance that dissolves in water. fish absorb from the water. When dissolved oxygen levels are low, it can be hard for organisms to survive. Is this a chemical property, or a physical property. please explain
Answer:
Physical Property
Explanation:
Chemical properties relate to an actual chemical change. In this case only the quantity of oxygen concentration changes, there is no chemistry change.
Chemical property change example: Iron nail falls into the water and oxidizes/rusts.
MULTIPLE CHOICE
Put the following items in order from smallest to largest.
А
gene, chromosome, nucleus, cell, base, DNA
B
DNA, gene, chromosome, base, nucleus, cell
с
cell, nucleus, chromosome, gene, DNA, base
D
base, DNA, gene, chromosome, nucleus, cell
Answer:
D
Explanation:
Base would be the smallest and cell would be largest
Answer:
D
Explanation:
The base is the smallest out of everything in these choices, then it should be the DNA, Gene, and so forth
What is a fossil? Different types?
Answer:
a fossil is a bone under the ground
Explanation:
and ex of a fossil is a dinosaur fossil
true or false- ebola virus is spiral in nature
Answer:
TRUE (￣ω￣)/
Explanation:
Ebola viruses are mainly found in primates in Africa and the Philippines; there are only occasional Ebola outbreaks of infection in humans. Ebola hemorrhagic fever occurs mainly in Africa in the Republic of the Congo, Gabon, Sudan, Ivory Coast, and Uganda, but it may occur in other African countries.
An empty field has no plants growing on it. When it rains, some of the field's sail washes away downhill.
Which statement best explains how planting grass on the field might help reduce soil erosion?
O A Grass will make the soll more wet
B. Grass will help hold the soil together.
c Grass will increase the amount of soil.
O O D. Grass will stop water from moving over the field.
O
Answer:
b grass will help hold the soil together
True or false a producer eats other organisms?
Answer:
False
producers make food
Explanation:
It’s 2:00 in the afternoon and you haven’t eaten anything since breakfast
Answer:
you are starving
Explanation:big hungry
Answer:
Explanation:
Ohhh!!! Hahahhah
In summary, transgenic _______________ flies will produce light in a pattern that reflects the _________________________________ activity of the _______________ gene.
Answer: per-luc; transcriptional; period
Explanation: While the transgenic fly is expected to have normal transcriptional activity per gene, and a normal biological clock, however, the transgenic fly can have red eyes and per transcriptional activity can be reported as light emissions. Transcription of the transgene results in production of the enzyme luciferase, which acts on luciferin substrate. Therefore, in summary, transgenic per-luc flies will produce light in a pattern that reflects the transcriptional activity of the period gene.
If a DNA has sequence 5’ATTAGCGACGTAT3’, its complementary strand of DNA is TAATCGCTGCATA
Answer:
Nope
Explanation:
Old: ATTAGCGACGTAT
New: TTATCGCTGCATA
So what you said is wrong because its not.....
TAATCGCTGCATA
Its
TTATCGCTGCATA
U made one "t" at the beginning and 2 "a" after, it should be 2"t" at the beginning and 1 "a" after.
The purpose of both mitosis and meiosis is to create new cells. Both processes involve the replication of genetic material within the cell, and
both take place within a sexually reproducing individual. There is a difference between the processes, however. What is one crucial
difference?
SC.912.L. 16.17
Meiosis creates an exact replica of the parent cell, while mitosis shows genetic diversity.
Mitosis creates an exact replica of the parent cell, while meiosis shows genetic diversity.
Only meiosis allows for the possibility of gene point mutations.
Only mitosis allows for the possibility of translocation.
Answer: Mitosis creates an exact replica of the parent cell, while meiosis shows genetic diversity.
Explanation:
I did the test too
The one crucial difference between meiosis and mitosis is mitosis creates an exact replica of the parent cell, while meiosis shows genetic diversity.
The correct option is (B).
What is the difference between meiosis and mitosis?Mitosis and meiosis both are the process of cell division.
Mitosis occurs generally when cell growth happens, the cell divides itself to produce two identical daughter cells.
Meiosis, in cell division, occurs in germ cells and in the division there is a formation of four daughter cells.
Mitosis produce exact identical cell with equal number of chromosome, whereas meiosis produce four haploid cells with genetic diversity.
Thus, the option (B)Mitosis creates an exact replica of the parent cell, while meiosis shows genetic diversity is correct.
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Cells in the nervous system have a potential difference of 70mV across the cell membrane separating the interior of the cell from the extracellular fluid. This potential difference is maintained by the iion pumps that move charged ions across the membrane. Is this an emf
Answer:
The correct answer is - yes, The ion pumps can actively separate charge; thus, they can create a potential difference.
Explanation:
Ion channels create a potential difference by providing a path for the flow of current across the membrane. Ion pumps such as Na+/K+ pump create a potential difference across the membrane by separating the charge.
In the sodium-potassium pump the movement of ions across the inside and outside of the membrane by active transport. The concentration difference between the inside of the membrane and outside of the membrane causes a potential difference.
40 Points
What is the movement of air during the day where land and water meet?
Question 1
options:
Cooler air over land moves toward the water, where it is warmed by radiation.
Cooler sea air moves toward land, where conduction from the land warms it.
Direction cannot be predicted; it must be observed.
Why are climate and latitude so closely related?
Question 2 options:
Lines of latitude are based on climate zones.
Radiant energy from the sun heats locations closest to the equator the most.
Higher latitudes have fewer buildings and a greater ability to absorb radiant energy.
Answers:
Question 1: Cooler air over land moves toward the water, where it is warmed by radiation.
Question 2: Radiant energy from the sun heats locations closest to the equator the most.
what could a dog living now and a car living thousands of years ago have in common?
Answer:
movement
Explanation:
Both of them can move and can be move
a real DNA molecule consists of THOUSANDS of these pairs of nucleotides. What is the pairing arrangement of nitrogen bases
Answer:
The correct answer is - Cytosine pairs with guanine and thymine pairs with adenine.
Explanation:
In a real DNA or B-DNA the interaction or arrangement of the nitrogen bases are defined and almost remain the same. The bond between the nitrogen bases is hydrogen bonds.
The hydrogen bond between the purine and pyrimidines (types of nitrogen bases) are as follows:
Adenine always pairs with Thymine and Guanine always pairs with Cytosine in a real DNA molecule.
Could I get help on these 2 questions .
Answer:
The ocean, clouds, and under the earth