Answer:
Dmitri Mendeleev
Explanation:
Mendeleev published his periodic table of all known elements and predicted several new elements to complete the table in a Russian-language journal. Only a few months after, Meyer published a virtually identical table in a German-language journal.[45][46] Mendeleev has the distinction of accurately predicting the qualities of what he called ekasilicon, ekaaluminium and ekaboron (germanium, gallium and scandium, respectively). (wiki.com)
Dmitri Mendeleev ! Hope it helps
Please mark brainliest
An insect gets trapped in tree sap. The sap dries, and the insects are preserved exactly as they were in real life.
Answer:
cool
Explanation:
Answer:
amber
Explanation:
Which phrase describes a scientific theory? A. A proposed explanation that can be tested B. An observation that leads to a question C. A thoroughly tested and widely accepted explanation D. A description of how elements of nature will behave under certain conditions
Answer:
C. A thoroughly tested and widely accepted explanation
Explanation:
A scientific theory is a coherent statement or set of ideas that explains observed facts or phenomenon and are thoroughly tested and widely accepted. Scientific theory is the basis of scientific knowledge. It is confirmed by observation and repeated experimentation under controlled conditions according to the scientific method. In scientific disciplines, scientific theory sets out scientific laws and principles of observed and generally accepted facts.
Answer:
A thoroughly tested and widely accepted explanation describes a scientific theory.
Explanation:
The illustration shows the basic unit of life. It is
A. a cell wall
B. an atom
C. a molecule
D. an organelle
Hmm, let me see. This illustration appears to be an image of a cell. But, there aren't any answers that has cell. Using logic, it would be an organelle. Mainly because there aren't any arrows directing to a specific organelle. Since a cell wall is an organelle, it has to be D.
Answer:
D. an organelle
A student used a microscope to get a very detailed look at pollen grains from an apple tree. In order to do this, the student first had to prepare the pollen grains to withstand the vacuum conditions and high energy beam of the microscope. The image below shows the student's view of the pollen grains through the microscope.
An electron microscope was used to visualize apple tree pollen grains, produced detailed micrographs. The pollen grains have two cells and two coverings, and their motion in water demonstrates the existence of atoms. Microscopes are an essential tool for studying such minute particles.
Explanation:To understand the detailed view of pollen grains from an apple tree as seen under a microscope, it's key to know that microscopes, such as the electron microscope used here, enable scientists to scrutinize small objects at a high scale and resolution. Images captured with a microscope are often referred to as micrographs.
In the micrograph of the pollen grains, the grains are about 50μm long and appear bean-shaped. 'Electron wavelengths' or the wavelengths emitted from the microscope are 100,000 times shorter than visible-light photons, allowing for a much higher resolving power to see finer details, such as the ones shown in the SEM micrograph of the pollen.
The mature pollen grain, developed from microspore mother cells, comprises two cells, the pollen tube cell, and the generative cell which resides inside the tube cell. It also has two layers, the inner layer (intine) and the outer layer (exine). The behavior of a pollen grain in water under a microscope yields a phenomenon known as Brownian motion, which illustrates the atom's existence due to the fluctuations in the number of atoms and molecules colliding with a mass that results in its complex paths of movement.
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Which of the following best describes reproductive structures common to both gymnosperms and angiosperms?
A) Seeds form after combining pollen and egg cells during sexual reproduction
B) Male pollen grains and female egg cells in the same reproductive organ
C) Cones containing seeds that are eaten and carried away by animals
D) Flowers designed to attract pollinators to assist in fertillization
Answer:
The correct answer is Seeds formed after combining pollen and egg cells during sexual reproduction.
Explanation:
This shows how reproductive structures are described as common to the two phylum.
The option that best describes the reproductive structures which is common to both gymnosperms and angiosperms is : ( A ) Seeds form after combining pollen and egg cells during x reproduction
Angisperms and gymnospermsAngiosperms have their seeds enclosed inside their fruits while gymnosperms ( non-flowering plants ) have their seeds exposed on their leave surface.The process of seeds forming after the combination of pollen and egg cells in the process of x reproduction represents a descriptive reproductive structure common in gymnosperms and angiosperms
Hence we can conclude that the reproductive structures which is common to both gymnosperms and angiosperms is seeds form after combining pollen and egg cells during x reproduction.
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ON A TIMER!
A geologist finds a metamorphic rock and notices that it has grains that formed in parallel layers. The geologist pries at the rock, and it splits apart along the bands formed by the layers.
Which type of rock did the geologist most likely find?
gneiss
limestone
marble
sandstone
Answer:
Option A, gneiss
Explanation:
Metamorphic rocks are classified based on their grain arrangement in to foliated rocks and non- foliated rocks. These foliated rocks are the ones in which the grains are arranged in parallel layers bands which allows them to split apart along these band. Some common examples of foliated metamorphic rocks are slate, schist, and gneiss
Thus , option A gneiss is the correct answer.
Answer: a
Explanation: edge
Which of these statements describe the correct path of a nitrogen atom through the nitrogen cycle?
A)
atmosphere, animals, plants, bacteria
B)
air, bacteria, plants, animals
C)
animals, air, bacteria, plants
D)
bacteria, air, animals, plants
Answer:
D
Explanation:
Bacteria, air, animals, plants
The correct path of events that take place in a nitrogen cycle is air, bacteria, plants and animals.
Answer: Option B
Explanation:
Nitrogen forms the major proportion of air. The nitrogen in the atmosphere cannot be used as such by plants and animals. Thereby the atmospheric nitrogen is fixed in the soil by means of nitrogen fixing bacteria, these nitrogen fixing bacteria live in the root nodules of leguminous plants.
They maintain a symbiotic relation with plants through which they provide nitrogen to the plants. The animals take this fixed nitrogen from plants.
Which example describes a mutualistic relationship between organisms?
a.Young wasps prey on caterpillars.
b.Crabs eat the remains of dead fish.
c. Ants protect a tree on which they feed.
d. Tapeworms feed on food in the intestines of cats
Answer:
c. Ants protect a tree on which they feed.
Explanation:
Mutualistic relationship is a symbiotic relationship where the organisms involved all benefit from the relationship. Mutualistic relationship occurs when two different species work together such that each organisms benefits from the relationship. An example of mutualistic relationship is; ants and trees such that the ants protect a tree on which they feed.Several prefixes often used with units of measurement are shown below. Each prefix has a specific value in the metric system.
What is the correct order of the prefixes, from smallest value to largest value?
Answer:
Micro, mill, kil,deca,centi
Explanation:
I think
Answer:
micro- → milli- → centi- → deca- → kilo-
The prefixes shown are used in the metric system and the International System of Units. Each prefix has a specific value.
The prefix micro- represents 10-6.
The prefix milli- represents 10-3.
The prefix centi- represents 10-2.
The prefix deca- represents 101.
The prefix kilo- represents 103.
cells from a blank organism cannot survive independently
Answer:
tardigrade
Explanation:
"The microscopic tardigrade—also known as the water bear—is the only animal that can survive the cold, irradiated vacuum of outer space. We talked to leading tardigrade researchers to find out what makes these little guys so amazing."
The promotion of companies’ sustainably harvested rainforest products is intended to _______.
a.
produce cheaper products
b.
promote overconsumption
c.
give the company a competitive advantage
d.
produce more expensive products
Please select the best answer from the choices provided
Answer:
c. give the company a competitive advantage
Explanation:
promoting sustainable products will not make the product cheaper and not necessarily more expensive. Over consumption is the opposite of sustainable. Thus, to promote sustainable products, this makes the company look good for consumers so they will buy these products thinking they are doing good for the environment.
Answer:
c
Explanation:
here is the youngest crust on Earth most likely located?
A. At divergent boundaries in the middle of the ocean
B. At transform boundaries where two plates slide past each other
C. At convergent boundaries where two continents meet
D. At convergent boundaries where oceans and continents meet
Answer:
Option (A)
Explanation:
In a divergent plate motion, two plates move in the opposite direction. Due to this plate motion, the magma rises up and comes out to the ocean floor, forming a long ridge which is commonly known as the mid-oceanic ridge. As soon as this magma comes out to the surface, it solidifies and forms igneous (basaltic) rocks.
These rocks are of geologically the youngest because they are directly forming from the cooling and solidification of magma. The rocks that are present at or near the mid-oceanic ridge are younger than the rocks that are away from the mid-oceanic ridge.
Thus, the youngest rocks are formed along the mid-oceanic ridge at a divergent plate boundary which is at the middle of the ocean.
Thus, the correct answer is option (A).
The youngest crust on Earth probably lies at divergent boundaries in the middle of the ocean. Therefore, the correct option is A.
The youngest crust on Earth is most likely to be found at isolated boundaries in the center of the ocean. Divergent boundaries are places where tectonic plates move apart and leave a gap. Magma in the mantle rises to fill the void, solidifies and forms fresh oceanic crust. The youngest crust on Earth is continually being built up by a process known as sea floor spreading. The ongoing regeneration and spreading of Earth's sea floor is facilitated by the continuous build-up of fresh oceanic crust at distinct boundaries.
Therefore, the correct option is A.
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Scientists who consider how their research may affect the environment show a sense of ____________?
Integrity in scientific research Is my best guess
Algae can reproduce by _____. fission sexual reproduction fragmentation all of the above
Answer:
fragmentation
Explanation:
Algae can reproduce by fragmentation. Most algae that are small reproduce asexually using fragmentation or by cell division. Larger algae on the other hand reproduce by use of spores. Fragmentation is a mode of asexual reproduction in which the parent divides into two or more fragments which later develops into a new organism.A good example of an algae that uses fragmentation is green algae also called Spirogyra. The parent divides into distinct pieces which can then produce an offspring.The correct answer is All of the above
Explanation:
Algae include multiple organisms that are mainly classified as eukaryotic and rely on photosynthesis like plants, although they are quite different from plants. In terms of reproduction, algae can reproduce in many ways depending on the sécies, this includes asexual reproduction that occurs through fission in which cells divide into two or more cells to reproduce; fragmentation in which the algae breaks into different fragments and each of these is able to form a new complete individual and also, algae can reproduce through sexual reproduction which means there are female and male gametes involved. According to this, it can be concluded algae can reproduce by all of the above (fission, sexual reproduction, and fragmentation).
what is the function of a capsid
Answer:1) it protects the nucleic acid from digestion by enzymes, 2) contains special sites on its surface that allow the virion to attach to a host cell, and 3) provides proteins that enable the virion to penetrate the host cell membrane and, in some cases, to inject the infectious nucleic
Explanation:
Answer:In 4 or more complete sentences, describe the process of protein synthesis and explain how transcription and translation creates protein.
Explanation:
According to the RNA world hypothesis, RNA acted as the genetic material and catalyzed reactions in ancient cells. What conclusion can you draw from this?
A. This implies that RNA can catalyze any chemical reaction that enzymes catalyze.
B. This implies that DNA and proteins evolved after RNA.
C. This implies that if a cell has a problem with its DNA, its RNA can compensate for the damaged DNA.
D. This implies that DNA and proteins aren't essential in cells today.
Answer: B
Explanation: RNA world theory implies that DNA and protein evolved after RNA. Some evidence suggests RNA enzymes can catalyse reactions that are essential for life, example, ribosomes that are composed of RNA primarily. And ribonucleotide moiety in many enzymes.
Answer:
This implies that DNA and proteins evolved after RNA.
Explanation:
When does the cell pinch off and divide into two daughter cells in mitosis?
A. Telophase
B. Interphase
C. Cytokinesis
D. Anaphase
Answer:
C. Cytokinesis
Explanation:
During the cell cycle, the division of cytoplasm (cytokinesis) is followed by the division of the nucleus (karyokinesis). Cytokinesis is occurred differently in plant cells and in animal cells during cell division. In animal cells, the plasma membrane of the parent cell pinches inward along the cell’s equator until two daughter cells are formed whereas, in plant cells, cytokinesis takes place by a cell plate formation
In mitosis during cytokinesis phase the cell pinches off and divide into two daughter cells .The correct option is C.
In cell biology, mitosis is a part of the cell cycle in which replicated chromosomes are separated into two new nuclei. Cell division by mitosis gives rise to genetically identical cells in which the total number of chromosomes is maintained. Therefore, mitosis is also known as equational division.
In general, mitosis is preceded by S phase of interphase and is often followed by telophase and cytokinesis; which divides the cytoplasm, organelles and cell membrane of one cell into two new cells containing roughly equal shares of these cellular components. The different stages of mitosis altogether define the mitotic (M) phase of an animal cell cycle. In cytokinesis,the cell pinches off and divide into two daughter cells in mitosis.
Thus, the cell pinch off and divide into two daughter cells in mitosis during cytokinesis. The correct option is C.
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Which of these is not a function of DNA Polymerase
Answer:C
Explanation:
The unwinding of DNA is not a function of DNA Polymerase.
DNA helicase is initially required to unwind the double helix before DNA polymerase can replicate the two strands.
What are the purposes of DNA polymerases?DNA polymerases are essential components of DNA replication and repair, which copy genomes and preserve their integrity to guarantee the accurate transmission of genetic information from one generation to the next.A double-stranded DNA molecule is duplicated into two identical DNA molecules during the process of DNA replication, which is carried out by DNA polymerase.Learn more about DNA Polymerase here:
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Describe the two general body forms of cnidarians, which include jellyfish and corals
A Cnidarian can have one of two basic body types, polypoid or medusoid. The polypoid is the configuration of corals and anemones, with the tentacles and mouth generally facing up, and the other side affixed to a substrate or connected to a colony of other creatures of the same species.
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Cnidarians, such as jellyfish and corals, have two body forms: polyp and medusa. Polyps are typically immobile with an upward-facing mouth and tentacles, while medusa are able to move with a bell-like body and downward-facing mouth and tentacles. Some cnidarians can display both body forms in their life cycle.
Explanation:Cnidarians, including jellyfish and corals, exhibit two general body forms known as polyp and medusa. The polyp form, akin to a stalk, is sessile (immobile) with tentacles and a single opening facing upwards. Examples include freshwater species of the genus Hydra and sea anemones. The medusa form is motile (able to move) and bell-shaped, with the mouth and tentacles hanging down from the body. Jellyfish are perhaps the most known representatives of the medusa form.
Additionally, some cnidarians are dimorphic, exhibiting both body forms during their life cycle. In these species, the polyp often serves as the asexual phase, with the medusa functioning as the sexual stage that produces gametes. However, species belonging to the class Anthozoa, which include sea anemones, sea pens, and corals, only exhibit the sessile polyp body form throughout their life cycle.
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Henry was having glass of water with some ice cubes in it and kept it near a window for some time. After some time, the water became warm. What is this process called?
condensation
freezing
melting
sublimation
evaporation
This process is called melting. When a solid melts, it turns into a liquid.
Melting is a process in which a solid gets converted into liquid. This occurs due to the presence of heat in the surrounding environment.
The correct option is:
option C. Melting
The following cannot be the correct options because:
Condensation is a process in which a gas phase turns into a liquid phase.Freezing is when the liquid turns into a solid.Sublimation occurs when there is a direct transition of solid into the gas phase.Evaporation is a process that occurs on liquid surfaces where they get converted into a gas phase.Therefore, when the glass of water with ice cubes is kept outside it will melt and becomes warm due to the transfer of heat.
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which of the following describes how dna provides evidence to support that life changes over time
A- some animals exhibit similar stages of embryonic development
B- Some animals exhibit structural that are no longer used for any purpose
C- Some animals exhibit similar genetic code
Although all are true, it is B.
Vestigial structures indicate that the animals evolved from an ancient ancestor.
which type of grass would most likely be used to create a florida friendly yard
-florida gama grass
-panic grass
-fakahatchee grass
-wire grass
I looked it up for you and i didnt find any of those grasses ;-; but i live in florida and i feel like the most obvius one would be the florida gama grass.
Im sorry if im wrong hope this helps :)
Answer: First option is correct.
Explanation:
florida gama grass would most likely be used to create a florida friendly yard.
Because this plant creates large crumps which is used for a border and work as an accent plant and it is easy to grow and propagate so, it is used in making wonderful garden.
Hence, First option is correct.
WILL GIVE 60 POINTS!!!!
A student observes a star from two positions of Earth in its orbit, in summer and winter, and measures the change in the position of the star. Which of these can be best calculated by this method?
the shift in light traveling from star to Earth in winter
the shift in light traveling from star to Earth in summer
the distance of the star from Sun using parallax method
the distance of the star from Earth using parallax method
the answer for this question is the distance of the star from sun using parallax method
Answer:
The correct answer will be option the distance of the star from Sun using parallax method.
Explanation:
Parallax method or trigonometric parallax is a method of measuring the distance of nearby stars in space on the basis of displacement of stars against the background.
Since a student observes the position of the star in summer and then after 6 months in winter, star changes its position or displaces which can be measured by the student along with measuring parallax angle and drawing a baseline from the Sun as Earth revolves in orbit around the Sun. So by using the parallax method and the formula he can easily determine the distance from the Sun.
Thus, the distance of the star from Sun using the parallax method is the correct answer.
The carp fish has 104 chromosomes in its body cells. When the fish's body cells divide by mitosis, how many chromosomes will each daughter cell have?
A.
52
B.
208
C.
104
D.
312
The answer is C. 104
What type of bond holds two different strands of DNA together?
Answer:The nucleotides in a base pair are complementary which means their shape allows them to bond together with hydrogen bonds. The A-T pair forms two hydrogen bonds. The C-G pair forms three. The hydrogen bonding between complementary bases holds the two strands of DNA together.
Explanation:
Final answer:
Hydrogen bonds hold the two strands of DNA together by connecting the nitrogenous bases. This bond is weaker than the covalent bonds in the DNA's structure, enabling DNA replication.
Explanation:
The type of bond that holds two different strands of DNA together is the hydrogen bond. These bonds occur between the nitrogenous bases in a way that adenine (A) pairs with thymine (T) and cytosine (C) pairs with guanine (G), forming base pairs. The DNA molecule appears like a ladder twisted into a double helix, with the base pairs acting like the rungs and the sugar-phosphate backbone forming the sides of the ladder. The hydrogen bonds are weaker than the covalent bonds in the sugar-phosphate backbone, which allows the DNA to unzip easily for replication while ensuring stability of the helical structure.
These are parents, parents of parents, etc.
Answer:
Ancestors
Explanation:
Ancestors because it says etc. meaning more that just parents, parents of parents.
Hope this helps! :)
The term 'parents' refers to individuals who are responsible for the care and upbringing of their children. This term can also extend to grandparents or extended family members in cases where they take up the role of the primary caregiver. In genetics, 'parents' also refer to organisms contributing genetic material to offspring.
Explanation:The term 'parents' is commonly used in a social or familial context to refer to individuals who have offspring either biologically, through adoption, or through other familial relationships. They are responsible for the upbringing and care of their children.
'Parents' in a wider context can also include 'parents of parents', often referred to as grandparents who, in many cultures, play a crucial role in a child's upbringing. In certain circumstances, these grandparents may take on the role of primary caregivers, effectively becoming parents themselves.
Beyond direct parenting, there are several forms of family structures, including single-parent families, blended families (where there are step-parents and/or step-siblings), and extended families, where others like aunts, uncles, cousins also play significant roles in a child's upbringing.
Additionally, in genetic terms, the term 'parents' is used to describe individual organisms that contribute genetic material to create offspring. This biological concept of parents exists parallel to, and distinct from, social and legal aspects of parenthood.
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QUESTION 9
The focus of an earthquake is the what?
A. strength of the earthquake
B. place at Earth's surface where the earthquake happens
C. point within Earth where an earthquake originates
D. the types of rocks affected by an earthquake
Answer:
C. point within Earth where an earthquake originates
Explanation:
The point on Earth's surface directly above the focus is the epicenter of the earthquake.
C. point within where an earthquake originates
Explanation: the focus in the earthquake is the point in the interior of the earth from where the earthquake originates
About 800 rattlesnake bites occur in the United States every year. Rattlesnake venom affects the nervous system. Which of the following symptoms would you expect to accompany a rattlesnake bite?
Answer:
muscle spasms and numbing or tingling in extremities
Explanation:
Answer:
The answer is "muscle spasms and numbing or tingling in extremities"
Explanation:
I read the article and did the test that followed.
How many times your heart beats in one minute is called
Answer:
BPM
Explanation:
Beats Per Minuite
Answer:
Beats per minute
Explanation:
Your heart beats 60-100 times per minute
Question 7 options:
If the DNA sequence reads TAT, what is the mRNA codon?
Answer:
AUA
Explanation:
Thiamine pairs with Adenine. However, in mRNA, the Thiamine base does not exist. It is replaced by Uracil. Therefore, instead of the A in the DNA strand pairing with a T, it pairs with a U on the mRNA.
The DNA sequence that reads TAT gives rise to an mRNA codon that corresponds to the amino acid tyrosine
Explanation:
According to the central dogma of life the DNA gets transcribed to RNA which gets translated to the protein, the protein is the ultimate macromolecules that helps in the metabolic activities of the human, an important aspect of this process is that not all DNA is converted into RNA similarly not all RNA is converted to protein, only the mRNA is converted to the protein based on a degenerative codon mechanism.