Answer:
fish and tetrapods are both vertebrates that have a backbone with a spinal cord. fish lived before tetrapods because their fossils are in rocks over 500 million years old.
Explanation:
fish and tetrapods are both vertebrates that have a backbone with a spinal cord
The main function of which of these body systems is to create the movement a swimmer needs to swim across a swimming pool?.
Answer: Muscular System
Explanation:
The Muscular System creates the movement a swimmer needs to swim across a swimming pool.
Make a table summarising the main components of tobacco smoke and their effects on the human body.
Answer: Some of the components in tobacco smoke include:
Nicotine (the addictive drug that produces the effects in the brain that people are looking for)
Hydrogen cyanide.
Formaldehyde.
Lead.
Arsenic.
Ammonia.
Radioactive elements, such as polonium-210
Benzene.
Explanation: Highly damaging components of tobacco smoke include:
tar – is the word for the solid particles suspended in tobacco smoke. The particles contain chemicals, including cancer-causing substances (carcinogens). Tar is sticky and brown, and stains teeth, fingernails and lung tissue
carbon monoxide – is a poisonous gas. It is odourless and colourless and, in large doses, quickly causes death because it takes the place of oxygen in the blood. In people who smoke, the carbon monoxide in their blood makes it harder for oxygen to get to their organs and muscles
oxidizing chemicals – are highly reactive chemicals that can damage the heart muscles and blood vessels of people who smoke. They react with cholesterol, leading to the build-up of fatty material on artery walls. Their actions lead to heart disease, stroke and blood vessel disease
metals – tobacco smoke contains several metals that cause cancer, including arsenic, beryllium, cadmium, chromium, cobalt, lead and nickel
radioactive compounds – tobacco smoke contains radioactive compounds that are known to be carcinogenic.
The effects of tobacco smoke on the body include:
raised blood pressure and heart rate
constriction (tightening) of blood vessels in the skin, resulting in a drop in skin temperature
less oxygen carried by the blood during exercise
‘stickier’ blood, which is more prone to clotting
damage to the lining of the arteries, which is thought to be a contributing factor to atherosclerosis (the build-up of fatty deposits on the artery walls)
reduced blood flow to extremities (fingers and toes)
increased risk of stroke and heart attack due to blockages of the blood supply.
Answer:
nicotine.
carbon monoxide.
tar.
toxic chemicals such as benzene, arsenic and formaldehyde.
Their actions lead to heart disease, stroke and blood vessel disease. tobacco smoke contains several metals that cause cancer.
Explanation:
Help fast please! I'm lost on this!
Answer:
It should be 1. 2. and 4.
Explanation:
Mangroves have leaves that expel salt and as young plants they do have bladders to help dilute the salt. They also have arial roots to keep them straight and above the water.
I hope this helps!
2. Which body of water does not directly contribute water vapor into the atmosphere?
A. aquifers
C. oceans
B. rivers
D. Lakes
Answer:
a) aquifers
Explanation:
Looking at the answers choices, 3 of the answers have something in common. Oceans, rivers, and lakes all have their surfaces exposed to the atmosphere—including the direct path to the sun. This means that they evaporate the most into the atmosphere.
Aquifers are underground wells, meaning they only evaporate slightly into the atmosphere due to high levels of heat energy. However, they stay mostly underground and are not in the direct path of the sun's energy.
Genome editing techniques have been developed to exploit the CRISPR system of bacteria and archaea. Only the _____ component of the system is used in editing.
Answer:
Cas9
Explanation:
Genome editing techniques have been developed to exploit the CRISPR system of bacteria and archaea. Only the Cas9 component of the system is used in editing.
True or false: The first division of the zygote (fertilized egg) in a flowering plant is asymmetrical.
8
Select the correct answer.
Which statement best describes the classification of Kingdom Protista?
ОА.
"some of the above."
OB.
"none of the above"
O C.
"all of the plants and fungi."
OD.
"all of the above"
Kingdom Protista is the classification given to eukaryotic organisms composed of microorganisms that cannot be registered within the fungi, plant and animal kingdoms.
What is Kingdom Protista?Eukaryotic-type organisms that, due to their characteristics, are not part of the kingdoms of fungi, plants and animals, make up the kingdom protista.
This groups a very diverse set of generally unicellular or simple multicellular organisms that do not form tissues, both autotrophic and heterotrophic.
Therefore, we can conclude that Kingdom Protista is the classification given to eukaryotic organisms composed of microorganisms that cannot be registered within the fungi, plant and animal kingdoms.
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When a farmer breeds only his or her best livestock, the process involved is:.
Answer:
Selective breeding
Explanation:
The tough, fibrous, outermost covering of the spinal cord is the.
What is the science dealing with the size, distribution, composition,and changes in population.
Answer:
Demography
Explanation: Demography is the study of human populations – their size, composition and distribution across space – and the process through which populations change. Births, deaths and migration are the 'big three' of demography, jointly producing population stability or change.
Which statement best describes why the author of "Water Efficiency Strategies" organized the text into two main sections? Question 2 options: To show readers that thinking about both the supply side and the demand side are important for water efficiency. To show readers that thinking about the supply side is more important than the demand side. To use one section to describe the cause and the second section to describe the effect. To follow the structure most informational texts use when organized into two main sections to show two sides of a topic.
Answer:
A
Explanation:
Took the test!
An organism that is eukaryotic and photosynthetic is.
Answer:
A protist
Explanation:
Trust me.
During meiosis, homologous chromosomes exchange genetic material. This exchange of genetic material-
Answer:
Crossing over
Explanation:
The process of exchanging genetic material in homologous pairs in Prophase 1 of mieosis is known as crossing over
What is the loose connective tissue surrounding an individual nerve fiber called?.
Answer: The endoneurium.
Explanation: Each bundle of nerve fibers is called a fasciculus and the fasciculus is surrounded by a layer of connective tissue named the perineurium. Within the fasciculus, each individual nerve fiber, with its myelin and neurilemma, is surrounded by an important connective tissue named the endoneurium.
I hope this is helpful!Systemic gas exchange is the unloading of ____________ and loading of carbon dioxide.
What sequence of bases on RNA would match, or pair with, the following DNA sequence: GCA?
The sequence of bases on RNA that would match or pair with the following DNA sequence: GCA is CGU.
What is transcription?Transcription is the process by which mRNA sequence is produced from a DNA template in the nucleus of a cell.
During transcription process, the following applies:
Adenine (A) pairs with Uracil (U)Guanine (G) pairs with Cytosine (C)This means that the mRNA sequence that will result from a template of DNA with sequence: GCA is CGU.
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Child Artists' Tools Include Mixed Media, Maggots
1. How is Ms. O'Flaherty using maggots in a very unique way?
2. Where does she get these maggots?
3. What is Ms. O'Flaherty's profession? How does she use maggots in her
work?
4. What are some other positive attributes of maggots?
5. Would you be interested in trying this type of art? Why or why not?
Answer:
Mar 29, 2007 · Child Artists' Tools Include Mixed Media, Maggots Letting kids dip maggots into paint may sound merely disgusting — but there's an entomologist from U.C.-Davis who calls it …
Explanation:
By making "maggot art," Ms. O'Flaherty is utilizing maggots in a distinctive way.
What is Maggots art?A great approach to get kids interested in insects, especially fly larvae, is through maggot art. Although it is mostly geared towards kids between the ages of 6 and 14, parents and siblings of all ages find it entertaining as well! Prepupillary blow fly larvae are submerged in non-toxic solution as the main assumption.
Fly eggs are laid everywhere there is a protected area and a fresh food source again for new brood of maggots to feed on. Maggots hatch from these fly eggs. As a forensic entomologist, Ms. O'Flaherty frequently employs maggots to, among other things, ascertain the time of death through investigation and examination. Three main positive benefits of maggots on wounds include debridement, disinfection, and improvement of wound healing.
Thus, by making "maggot art," Ms. O'Flaherty is utilizing maggots in a distinctive way.
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In rock layers, jellyfish fossils are found lower than trilobite fossils, and trilobite fossils are found lower than ammonite fossils. what can be determined from this information? trilobites existed before jellyfish and ammonites. jellyfish existed before trilobites and ammonites. ammonites existed before trilobites and jellyfish. jellyfish, trilobites, and ammonites lived together.
Trilobites were exclusively marine animals. They were first appeared at the beginning of the Cambrian Period. In the context Jellyfish existed before trilobites and ammonites.
What is method to determine fossil age?To find the age of fossil, scientists use some type of clock to determine the date it was formed.
Geologists usually use radiometric dating procedures which is based on the natural radioactive decay of some elements such as potassium and carbon, as reliable clocks to date ancient events.
In the given context, jellyfish fossils are found lower than trilobite fossils, and trilobite fossils are found lower than ammonite fossils. Which determines that jellyfish existed before trilobites and ammonites.
Thus, the correct option is B.
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Answer:
B
Explanation:
Its the Answer
The moon orbiting the Earth - Non-contact
fore.
On Earth, the mass of an astronaut is 120 kg and a weight of 1200 N. What
predictions could we make about the mass and weight of the astronaut on
the Moon, where there is less gravity?
The mass of the astronaut is the same in both places. However, the weight is different due to the variation of gravity.
What is the weight?Weight is a term that refers to the force with which the Earth or another celestial body attracts a body due to the action of gravity. It is measured in Newtons.
What is the mass?Mass is a term that refers to a physical magnitude and general property of matter that expresses the inertia or resistance to the change of movement of a body. It is measured in kilograms.
How do weight and mass differ on Earth and the Moon?The weight of a body is not the same on Earth as on the Moon because the Moon is smaller and the force of gravity is less. Therefore, the weight of the astronaut will vary depending on the gravity with which he is attracted to the center.
On the other hand, the mass of the body does not vary even if the astronaut is in different places such as the Earth or the Moon, because he will always occupy the same space.
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How does a fossil gets into the fossil record?
Answer:
Explanation:
For an organism to be fossilized, the remains usually need to be covered by sediment soon after death. Sediment can include the sandy seafloor, lava, and even sticky tar. Over time, minerals in the sediment seep into the remains. The remains become fossilized
Answer:
i got u
Explanation:
For an organism to be fossilized, the remains usually need to be covered by sediment soon after death. Sediment can include the sandy seafloor, lava, and even sticky tar. Over time, minerals in the sediment seep into the remains. The remains become fossilized.
Which action describes an experimental investigation?
• A. Measuring the temperatures at which two rock samples melt
• B. Exploring the relationship of the material in a rock sample and its
hardness
•
C. Describing the types of materials that make up one rock sample
• D. Comparing the sizes of the crystals in two rock samples
BMIT
The action that describes an experimental investigation is measuring the temperatures at which two rock samples melt (option A).
What is an experimental investigation?Experimental investigations involve a process in which a test is designed and variables are actively manipulated, controlled, and measured in an effort to gather evidence to support or refute a causal relationship.
An experiment is conducted under controlled conditions to either;
demonstrate a known truth
examine the validity of a hypothesis
determine the efficacy of something previously untried
According to this question, measuring the temperatures at which two rock samples melt shows an action taken that exemplifies an experimental investigation.
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Csf flows into which ventricle through the interventricular foramen and out through the cerebral aqueduct?.
CSF flows from the lateral ventricles, via the interventricular foramens, and into the third ventricle, cerebral trench, and the fourth ventricle.
How does CSF flow through the ventricles?CSF flows from the lateral ventricles to the third ventricle via the foramen of Monro, it flows across the cerebral trench of Sylvius to the fourth ventricle and onto the subarachnoid space through the cracks of Magendie and Luschka.
Thus,CSF flows from the lateral ventricles, through the interventricular foramens, and into the third ventricle, cerebral trench, and the fourth ventricle.
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How is DNA stored in the nucleus?
Explanation:
DNA is tightly packed up to fit in the nucleus of every cell. As shown in the animation, a DNA molecule wraps around histone proteins to form tight loops called nucleosomes. These nucleosomes coil and stack together to form fibers called chromatin.
Select all that apply.
Which of the following are photosynthetic autotrophs?
plants
arthropods
all bacteria
protists
some bacteria
algae
Answer:
Plants. Some Bacteria. Algae. These 3 are the photosynthetic autotrophs..
Why the others don't fit:
Athropods are hetertrophs. Not all bacteria are autotrophs. Only some protists are autotrophs.
Mendel cross-pollinated second-generation purple-flowering hybrids.
What was the result of the second-generation cross, and why was it important?
Answer:
For the second generation, Mendel cross-pollinated two hybrids that had purple flowers. About 75 percent of the second-generation plants had purple flowers. These plants had at least one dominant factor. Twenty-five percent of the second-generation plants had white flowers.
The results of Mendel's second set of experiments led to his second law. This is the law of independent assortment. It states that factors controlling different characteristics are inherited independently of each other.
Which statement summarizes the law of superposition?
Answer:
The top layer of rock in a rock formation is the oldest.
Explanation:
it's A
A tautomeric shift may result in _____________ A. Transition mutations B. Induced mutations C. Any of the above D. Transversion mutations E. Frameshift mutations
Answer: C
Explanation:
Any of the above are possible
Our oceans absorb carbon dioxide from the air. Carbon doxide and ocean water form carbonic acid.
This causes the ocean's pH to become 4b
O lower
O higher
O it does not change
lower since it is becoming more acidic
The absorption of carbon dioxide from the air by the oceans causes the ocean's pH to become lower, meaning it becomes more acidic. Therefore option (A) is correct.
What affects ocean's pH?The ocean's pH can be affected by a variety of natural and human factors. One of the primary factors affecting the ocean's pH is the absorption of carbon dioxide from the atmosphere. As carbon dioxide dissolves in seawater, it reacts with water to form carbonic acid, which increases the concentration of hydrogen ions (H+) in the water and lowers the pH.
Other factors that can affect the ocean's pH include volcanic activity, which can release large amounts of carbon dioxide and other chemicals into the ocean, and nutrient runoff from land, which can lead to algal blooms that increase carbon dioxide and lower the pH. Human activities, such as burning fossil fuels and deforestation, can also release large amounts of carbon dioxide into the atmosphere, contributing to ocean acidification.
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In addition to atp, what are the products of glycolysis?.
The secretion of adh is directly stimulated by _______.
The secretion of adh is directly stimulated by Osmoreceptors.
What stamulated the secretion of ADH?Osmoreceptors are the specialized neurons of hypothalamus that is resposible for monitoring changes in intercellular osmolality. If the concentration of electrolytes increases then ADH secretion is affected.
So we can conclude that the secretion of adh is directly stimulated by Osmoreceptors.
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