Scientific knowledge is very dynamic, it changes all the time based on emergence of new proof. The fossil provided new proof about human lifestyles thousands of years ago.
Why is scientific knowledge important?Scientific knowledge permits us to develop unique technologies, solve realistic problems, and create informed findings both separately and collectively.
Because its by products are so useful, the method of science is snarled with those applications.
Since, option "D" is correct, When new proof are discovered, the scientific knowledge that are already in use are usually modified based on the new discovery.
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Which event marks the end of one menstrual cycle and the beginning of a new cycle?
Answer:
Menstrual flow and ovulation
Explanation:
The menstrual cycle is the hormones regulated the complex process. In this process, endometrium (a thickened lining of uterus wall) ruptures. Rupturing of endometrium results into the menstrual fluid which contains blood, cells from the lining of the uterus and mucus. The flow of menstrual fluid from the vagina is called menstruation. This process is to prepare the woman for expected fertilization.
Menstruation marks the end of one cycle and the release of ova from one of the ovary is beginning of next menstruation that occurs almost 14 days before menstrual flow.
If you could know that a fossil that is 10,000 years old started with 20 mg of carbon-14, how much would you expect that same fossil to have today?
Vitamin e protects membranes in red blood cells, white blood cells, nerve cells, and lung cells. why are these cells in particular in need of high amounts of vitamin e?
Answer:
Vitamin E supplements may prevent coronary heart disease , support immune function, prevent inflammation , promote eye health, and lower the risk of cancer.
Red blood cells, white blood cells, nerve cells, and lung cells need high amounts of vitamin E due to their high polyunsaturated fatty acid content and exposure to oxidative stress. Vitamin E acts as an antioxidant, preventing lipid peroxidation in cell membranes and working in conjunction with selenium to maintain cellular health.
The cells such as red blood cells, white blood cells, nerve cells, and lung cells require high amounts of vitamin E because they are particularly susceptible to oxidative damage from free radicals. Vitamin E serves as a powerful antioxidant that protects the polyunsaturated fatty acids present in the cell membranes from oxidation. The cells' high degree of unsaturation in their membrane lipids makes them vulnerable to lipid peroxidation, which can be detrimental to their function and integrity.
Vitamin E, especially in the form of alpha-tocopherol, prevents the oxidation of these fats by acting as a free radical scavenger. It donates electrons to free radicals, stopping the chain reaction of lipid peroxidation. In addition, vitamin E works by sparing or reducing the need for, selenium, which is needed for the activity of glutathione peroxidase, an enzyme that also reduces lipid peroxides and protects the cell membrane. This synergistic action is essential for maintaining cellular health, especially in cells that are exposed to higher levels of oxidative stress, such as lung cells which are constantly in contact with oxygen, and white blood cells that engage in immune responses.
Rod-like structures within skeletal muscle fiber that contain thin and thick filaments organized into sarcomeres are called
Bodily functions that follow "a law unto itself" are controlled by the involuntary nervous system. this system is also termed __________ and functions to __________.
Things like your eye color and height are not under your control. This is because they are determined by your genes. So, eye color is a good example of an inherited __________. A) estate B) gene C) height D) trait
Answer:
D) trait
Explanation:
trait The different physical features of an organism are known as its traits.
Hypothesize what potential impact a mutated egfr allele will have on a cell
Mutated EGFR can lead to cancer (especially lung cancer).
A mutation in EGFR is associated with uncontrolled tumor growth, which can accelerate cancer progression.
Epidermal Growth Factor Receptor (EGFR) receptors are found on the surface of tumor cells and their role is to send a growth signal to the nucleus of the cell. Some lung cancer tumors may contain a mutation in their DNA that affects the EGFR. The tumor is said to be "positive for EGFR mutations".
Tumor cells with EGFR mutations are highly sensitive to cancer treatments called "Targeted Therapies" or "EGFR Tyrosine Kinase Inhibitors".
The inflammatory response to corynebacterium diphtheriae infection results in the production of a lesion called a
In pea plants, the tall-stem allele and the short-stem allele are different forms of the same what'
Can you find which area of the crowd the pumpkin is hiding?
A condition known where kidneys fail to remove blood
As the organism inside the respirometer consumes oxygen what happens to the water
Answer:
A respirometer is a device that is used to measure the consumption rate of oxygen by any living organism.
So as the oxygen uses by the organism, the pressure of oxygen in the respirometer decreases and as the pressure decrease some amount of water enters the respirometer.
So according to the consumption of oxygen water will move inside the respirometer due to a reduction in pressure in respirometer. So the rate of respiration can be calculated because the amount of water enters is directly proportional to the amount of oxygen consumed by an organism.
Capillaries are best described as
a. thin walled vessels that convey blood toward the heart.
b. microscopic vessels in which blood exchanges material with the interstitial fluid.
c. thick walled vessels that convey blood away from the heart.
d. thick walled vessels that carry blood rich in oxygen.
e. thin walled vessels that carry blood deficient in oxygen.
Look at the pea diagram. Some peas are round while other peas are wrinkled.
a. What are the two phenotypes of the peas?
b. How many genotypes do the peas have?
c. What are the two homozygous genotypes?
d. What is the heterozygous genotype?
e. Which pea shape (wrinkled or smooth) is dominant?
f. Which pea shape (wrinkled or smooth) is recessive?
g. What are the two genotypes for the dominant pea shape?
h. What is the minimum number of dominant alleles needed to show the dominant trait?
i. What is the genotype for the recessive pea shape?
j. What is the minimum number of recessive alleles needed to show the recessive trait?
While washing her hair, Olivia noticed that she was losing a lot of hair. She visited a clinic, and the physician reassured her that her hair would grow back. How do you think Olivia’s hair will grow back? The hair will grow back by undergoing regeneration. The hair will grow back by undergoing meiosis. The hair will grow back by undergoing binary fission. The hair will grow back by undergoing mitosis.
The right option is; The hair will grow back by undergoing meiosis.
Meiosis is a type of cell division in which the number of parental chromosome is reduced by half, and there is formation of four haploid daughter cells that are genetically distinct from the parent cell that produced them. Meiosis only occurs when the cell needs to reproduce and it occurs in all eukaryotic, sexually-reproducing animals and plants.
Answer:
the hair will grow back from undergoing mitosis
Explanation:
How many muscles does it take to walk?
The chemical reactions inside living cells represent an organism's ____
a) Homeostasis
b) Evolution
c) Metabolism
d)Photosynthesis
Answer:
c) Metabolism is the correct answer.
Explanation:
The chemical reactions inside living cells represent an organism's (Metabolism).
metabolism is the sum of all biochemical reactions within the body, that gives energy for the vital process and the synthesis of organic substances.
metabolism consists of
catabolism is a destructive type of metabolism, where the breakdown of the complex substance into simpler substances anabolism :synthesizing of new(complex) substances.Your teacher is describing a plant that bears seeds and flowers, has five flower petals, and had seeds that are enclosed by fruits. What kind of plant is he describing ?
Answer:
Angiosperm
Because they are flowering and encased in fruit.
Research shows that Mount Everest grows and average of 4 millimeters each year. How many years will it take to grow 720 millimeters
A. 40
B. 100
C. 180
D.720
Answer:
It will take C. 180 years to grow 720 millimeters.
Explanation:
The research shows that Mount Everest grows and average of 4 millimeters each year.
In order to calculate how many years it will take to grow 720 millimeters, we need to divide 720 millimeters by the average of 4 millimeters each year.
If we calculate it :
[tex]\frac{720mm}{4\frac{mm}{year}}=180years[/tex]
We found out that it will take 180 years. Therefore, the correct option is C. 180
Which is more accurate when showing the movement of food through a community- a food chain of food web?
Objects that identify elements in containers and can be manipulated to move among elements
Humans are the definitive host for __________, which is a type of __________. humans are the definitive host for __________, which is a type of __________. plasmodium; cestode taenia solium; roundworm echinococcus granulosus; tapeworm taenia saginata; tapeworm
In the winter, icy roads are often salted to remove the ice and make them less slippery. grasses and other herbaceous plants often die near the side of these roads. what causes this to happen?
Grass often dies near roads that have been salted to remove ice in winter because salt has spread to the grass cover. Then the water goes into the ice, because the grass is attracted to the salty ice water. Consequently, it dehydrates the plant cell, removing excess water, so it dies, as it can no longer perform the proper function of the cell.
How would the population dynamics of the warbler species differ from what has been documented by s. sillett and colleagues? explain?
How do the plant cells placed in a medium for tissue culture change terms of their degree of specialization?
The relatively slow brain waves of a relaxed, awake state are called:
Frequently, what is the earliest symptom of left-sided heart failure?
What happens immediately after the chromosomes line up on the cell's equator?
Organs _____.
only exist in animals
are less complex than the tissues which make them
perform functions that tissues cannot carry out on their own
are made of only one type of tissue
Answer:
perform functions that tissues cannot carry out on their own
Explanation:
In the hierarchy of living system organs come after tissues and before organ systems. Hence, organs are complex then tissues and perform functions that tissues wont be able to perform on their own.
A organ is made up of various types of tissues. They can be divided into two categories, main tissue and sporadic tissue. Main tissue or parenchyma is unique to that organ and defines the function of the organ. For example: Cortex and medulla together form the main functional tissue in kidney. Similarly, myocardium is the main tissue of the heart. Sporadic tissue has blood vessels, nerves and connective tissues.
The nurse is caring for the client who is at risk for lung cancer because of an extremely long history of heavy cigarette smoking. the nurse tells the client to report which frequent early symptom of lung cancer