Answer: where did the asteroid that killed the dinosaurs land The Chicxulub crater (/ ˈ tʃ iː k ʃ ʊ l uː b /; Mayan: [tʃʼikʃuluɓ]) is an impact crater buried underneath the Yucatán Peninsula in Mexico. Its center is located offshore near the town of Chicxulub, after which the crater is named.
Explanation:
Which of the following is a single blood vessel that supplies blood to the pancreas, cecum, and appendix?
Answer:
a. Superior mesenteric artery
Explanation: is correct
What's the sequence of a single complete engine cycle?
Explanation:
An internal-combustion engine goes through four strokes: intake, compression, combustion (power), and exhaust. As the piston moves during each stroke, it turns the crankshaft.
the alleles of all individuals within a population are referred to as the:
Answer:
it is called a gene pool.
how does an impulse travel from one neuron to another?
Answer:
When a nerve impulse reaches the end of an axon, the axon releases chemicals called neurotransmitters. Neurotransmitters travel across the synapse between the axon and the dendrite of the next neuron.
Explanation:
The binding allows the nerve impulse to travel through the receiving neuron.
When we say that 2 × 3 is the same thing as 3 + 3, where did the 2 go?
Answer:
it in still kinda there you just made it 3 plus 3 you kinda distributed the two
what do the spinal cords do?
Answer: They help regulate your nerve system.
Explanation: The spinal cord is the first thing to get in touch with your nerve cells.
Can anyone please fill in all the blanks?
Answer : yes
Explanation:
In the Krebs Cycle, which molecule enters the cycle?
carbon dioxide
oxygen
pyruvate
citric acid
Answer:
pyruvate............
Explain your stepwise procedure for building the protein from DNA sequence
Answer:
During transcription, the enzyme RNA polymerase (green) uses DNA as a template to produce a pre-mRNA transcript (pink). The pre-mRNA is processed to form a mature mRNA molecule that can be translated to build the protein molecule (polypeptide) encoded by the original gene.
Explanation:
Which describes the GENOTYPE that would result in 100% of the offspring of a black chicken crossed with a white chicken if the alleles are codominant?
Answer:
On mating a black chicken with white chicken, the offsprings will inherit B allele from black parent and W allele from white parent. The genotype of offsprings will be BW
Explanation:
Osmosis is a process involving movement toward equilibrium. Pick from the following the situation the one that you wouldn't expect to undergo any osmosis.
A) a plant cell placed in plain water
B) a plant cell placed in salty water
C) a plant cell placed in water with the same salt concentration as the cell
D) a plant cell placed in sugar water
Answer:
c
Explanation:
The number of ATP produced during aerobic cellular respiration from one glucose molecule is usually __________.
in total, how many molecules of nadh and fadh2 are produced during the oxidative metabolism of one molecule of glucose?
Answer:
Ten molecules of NADH, and two molecules of FADH2
Explanation:
Most of the usable energy obtained from the breakdown of carbohydrates or fats is derived by oxidative phosphorylation, which takes place within mitochondria. For example, the breakdown of glucose by glycolysis and the citric acid cycle yields a total of four molecules of ATP, ten molecules of NADH, and two molecules of FADH2. Electrons from NADH and FADH2 are then transferred to molecular oxygen, coupled to the formation of an additional 32 to 34 ATP molecules by oxidative phosphorylation. Electron transport and oxidative phosphorylation are critical activities of protein complexes in the inner mitochondrial membrane, which ultimately serve as the major source of cellular energy.
A test used to measure the levels of radioactively-tagged hormones in the plasma of the blood is called __________.
A test used to measure the levels of radioactively-tagged hormones in the plasma of the blood is called Radioimmunoassay (RIA). This assay uses a competitive binding reaction.
Radioimmunoassay (RIA) is a competitive binding assay that involves antibody-antigen binding and radioactive antigen.
In this assay (RIA), a specific antigenic labeled particle competes for binding to a given antibody or for the binding sites in a cell receptor to form immune complexes.
In consequence, RIA in vitro assay can be used to measure the presence of a given antigen that shows high sensitivity.
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Tumours can be life-threatening if tumour cells are able to grow through tissues from their original site, or detach and spread to other organs as secondary tumours. Tumours that can spread like this are called malignant tumours. What are the factors contributing to the development of malignant tumours
Answer:
malignant cells eventually acquire the ability to metastasize.
Explanation:
Cancerous tumors are called malignant neoplasms. When cells grow and divide more than they should, they can form tumors. Malignant neoplasms can spread to nearby tissues as well as to parts of your body that are far away.
What is tumor?A mass of aberrant tissue that develops when cells expand and divide faster than they should or do not die when they should. There are two types of tumors: benign, which do not cause cancer, and malignant (cancer).
Benign tumors have the potential to become quite large, but they do not metastasize (spread to neighboring tissues or other regions of the body) or invade. Malignant tumors have the potential to metastasize, or spread to neighboring tissues and invade them. In addition, they have the ability to travel throughout the body via the circulatory and lymphatic systems. Also referred to as a neoplasm.
Cancerous bumps are big, hard, painless, and sudden. The bulk will develop steadily. Cancerous lumps can be felt on the breast, testicle, neck, arms, and legs.
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The ventral horn of the spinal cord contains cells bodies of:
Answer:
the lower motor neurons which have axons leaving via the ventral spinal roots on their way to innervate muscle fibers
Diabetes is a disease where the body is unable to produce enough insulin in the pancreas to help lower the levels of blood glucose.
Which two organelles are most responsible for producing insulin in the pancreas?
A)
nucleus and ribosome
B)
nucleus and mitochondria
C)
ribosome and mitochondria
D)
Golgi apparatus and lysosome
Answer:
A) Nucleus and Ribosome
Explanation:
Diabetes can be a very chronic disease if not properly controlled, it mostly affect the aged people. If not properly treated it can in some cases lead to the death of the individual.
Diabetes occurs when the pancreas in the body system does not produce any insulin, the insulin is a type of hormone that is found in the body, this hormone helps to normalize the amount of blood sugar that is present in the human body.
The two organelles in the pancreas that is responsible for the production of insulin in the body is; nucleus and ribosome
1. Complete the sentence. ____________ affects the way heat is distributed on Earth's surface.
Earth's tilt on its axis
Earth's distance from the sun
The speed of Earth's rotation
The speed of Earth's revolution
2. Two greenhouse gases, carbon monoxide and carbon dioxide, have increased Earth's temperatures due to the burning of fossil fuels. This phenomenon is known as
global warming
climate change
greenhouse effect
positive feedback
Answer:
Explanation:
It doesn't mean that temperatures everywhere are hotter. The angle at which sunlight hits Earth is one of the most important factors impacting the average temperatures in a region. Higher angle (more direct) sunlight warms Earth more effectively. Earth's axis is tilted by ~23°.
Earth's tilted axis causes the seasons. Throughout the year, different parts of Earth receive the Sun's most direct rays. So, when the North Pole tilts toward the Sun, it's summer in the Northern Hemisphere. And when the South Pole tilts toward the Sun, it's winter in the Northern Hemisphere.
Match each vein with the correct label. (arm)
Answer:
1. Cephalic
2. Median Cubital
3. Axillary
4. Brachial
5. Basilic
6. Ulnar
7. Radial
Explanation: is correct
Which theory proposes that the number of species in an island is determined by the size of the island and its distance from the mainland
Answer:
The theory of island biogeography
Explanation:
immigration, emigration and extinction. Immigration is affected by the distance of an island from a source of colonists.
imagine that there are mutations in the cdk genes such that their gene products are nonfunctional. what effect would this mutation have on an immature unspecialized blood cell precursor found in the bone marrow?
The mutations of the CDK genes in an immature unspecialized blood cell precursor would produce that the cell would NOT be able to reproduce itself. These genes control the cell cycle.
The cell cycle can be divided into two major stages: interphase, which is in turn divided into G1, S and G2 phases, and mitotic (M) phase.
Cyclin-dependent kinases (CDKs) and cyclins (their molecular partners) are proteins that control the progression through the different stages of the cell cycle.
CDKs are protein kinases that phosphorylate different protein substrates, thereby triggering molecular cascades associated with the progression of the cell cycle.
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What structure is represented by the letter C?
Choose 1 answer:
(Choice A)
A
Lysosome
(Choice B)
B
Nucleus
(Choice C)
C
Vacuole
(Choice D)
D
Mitochondria
Answer:
Please send the image that represent the details.
Which option describes how the absolute age of a fossil is commonly determined?
The carbon-14 in a fossil breaks down over time. The remaining amount of carbon-14 in the
fossil can be used to calculate its age.
The carbon-12 in a fossil breaks down over time. The remaining amount of carbon-12 in the
fossil can be used to calculate its age.
Once the organism is dead, carbon-12 starts to accumulate. The existing amount of carbon-12
in the fossil can be used to calculate its age.
Once the organism is dead, carbon-14 starts to accumulate. The existing amount of carbon-14
in the fossil can be used to calculate its age.
The half-life of an isotope is useful to determine how much time has an organism been dead or how much isotope is left in the organism. Option A) The carbon-14 in a fossil breaks down over time. The remaining amount of carbon-14 in the fossil can be used to calculate its age.
What is an isotope half-life?
When talking about an element or isotope's half-life, we refer to the time it takes for the element's mass to be reduced to its half, while the other half becomes its daughter form.
The half-life values are useful to determine the age of dead matter or for how long that matter has been dead.
Carbon 14 is a radioactive carbon isotope. It is used in radiocarbon dating techniques to estimate the age of fossils. This is a reliable technique used for dating organic samples that are less than 50,000 years old.
The radioactive C14 has a half-life of 5730 years. It means that an organism that has been dead for 5730 years has half the C14 amount or concentration than the same organism had when it was alive.
The correct option is A)
The carbon-14 in a fossil breaks down over time. The remaining amount of carbon-14 in the fossil can be used to calculate its age.
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The method used to determine the absolute age of a fossil is called radiometric dating. Radiometric dating relies on the fact that radioactive isotopes decay at a predictable rate over time. Carbon-14 is a radioactive isotope that is commonly used in radiometric dating. When an organism dies, it stops taking in carbon-14, and the carbon-14 that was in the organism begins to decay. The remaining amount of carbon-14 in the fossil can be used to calculate its age.
Therefore the answer is option a.
The carbon-14 in a fossil breaks down over time. The remaining amount of carbon-14 in the fossil can be used to calculate its age.
2. What does posthumous mean? How does it relate to Rosalind Franklin?
Answer:occurring, awarded, or appearing after the death of the originator.
Explanation:And a still smaller number know that Rosalind Franklin, another English scientist, was not given this great honour although her work was an important contribution to Watson, Crick and Wilkins' discovery. ... She died very young in 1958 at the age of 38 and the Nobel Prize is not given posthumously.
The overall population of a species has increased. What could have occurred to allow this to happen?
A. The emigration rate is greater than the death rate.
B. The death rate of the population is greater than the immigration.
C. The birth rate of the population is less than the death rate.
D. The immigration of the population is greater than the emigration.
Answer: d
Explanation:
what is the longest and strongest bone in the human body
Answer:
The femur
Explanation:
defenition of osmosis in your own words
Answer:
Osmosis is the scientific process of transferring fluid between molecules. When molecules move in and out of a cell to achieve the same concentration of something, like salt, on both sides, then osmosis is happening. ... The fluid might go back and forth a few times until both solutions are equally concentrated.
Answer:
Movement if water molecules from the region of higher concentration to the region of lower concentration, down a concentration gradient, through a partially permeable membrane, till it reaches equilibrium state.
Where would you most likely find specialized tissue
1. Sperm cell
2. Egg cell
3. Cactus
4. amoeba
during action potential, positively charged ________ ions move inside the cell.
Sodium ions move inside the side during action potential.
This stage of action potential is called depolarization.This open voltage gated sodium channel.What is action potential?
- Action potentials (those electrical impulses that send signals around body) are nothing more than a temporary shift (from negative to positive) in the neuron's membrane potential caused by ions suddenly flowing in and out of the neuron.
- It consists of phases:
depolarization overshootrepolarization.- An action potential propagates along the cell membrane of an axon until it reaches the terminal button.
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Which of the following is the correct order of blood flow through the heart?
Answer:
c. Superior/Inferior Vena Cava, Right Atrium, Right Ventricle, Lungs, Left Atrium, Left Ventricle, Aorta.
Explanation: is correct
