Answer:
Pleistocene Epoch
Explanation:
Modern humans coexisted with woolly mammoths during the Upper Palaeolithic period when the humans entered Europe from Africa between 30,000 and 40,000 years ago. Before this, Neanderthals had coexisted with mammoths during the Middle Palaeolithic, and already used mammoth bones for toolmaking and building materials. Woolly mammoths were very important to ice-age humans, and human survival may have depended on the mammoth in some areas.
The Pennsylvania period, Precambrian period, and the Palezoic Era all existed millions of years before mammoths and humans.
The graph on the left shows the heights of a population of penguins. The graph on the left shows heights of the population five years later.
What happened to the population of penguins?
Answer: disruptive selection
There are three types of selection:
Stabilizing selectionDirectional selectionDisruptive selection1. Stabilizing selection
Selects for average individuals Decreases variation/diversity ⇒ the population has more of the average trait and less of the extreme traits2. Directional selection
Selects for one of the extreme variations of a traitDecreases variation/diversity3. Disruptive selection
Selects for both extremes of a trait's variationSelects against average phenotypesCan lead to speciation (formation of a new species)See below attachment for additional help.
It is directional selection.
Which blood vessel receives blood from the trunk and legs?
artery
aorta
inferior vena cava
superior vena cava
Answer:
The superior vena cava and inferior vena cava are veins that return deoxygenated blood from circulation in the body and empty it into the right atrium. The pulmonary artery carries deoxygenated blood from the right ventricle into the lungs for oxygenation.
Answer:
Its inferior vena cava which receives deoxygenated blood from the trunk and legs.
Explanation:
Our hear has 4 chambers. The upper two chambers receive the blood from all the parts of the body, where as the lower two chambers pump the blood. The right atrium receives the deoxygenated blood from various parts of the body. The left atrium receives oxygenated blood from lungs. The superior and inferior vena cava are veins, they carry deoxygenated blood. The one which carries deoxygenated blood from upper half of the body to right atrium is superior vena cava and the one which carries deoxygenated blood from lower half of the body to right atrium is inferior vena cava.
Which type of rock does B represent?
Igneous rock
Metamorphic rock
Rock formed by compaction
Rock formed by heat and pressure
Answer: Rock B is a Igneous rock.
Answer:
Igneous rock
Explanation:
The igneous rocks are formed by magma, a creamy larva that consists between the friction of the plates, after cooling. The very high temperature of the magma, 1100 ° C, and the environment, the interior of the Earth, do not allow the existence of fossils. They are extremely resistant rocks and result in stones such as granite and basalt. One way to remember their formation and why they are called that way is to associate them with their nickname, magmatic rocks.
As we can see rock B in the image shown above, it came out of an erupting volcano, so we can say that it is an igneous rock.
Igneous or magmatic rocks can take longer or shorter to cool, depending on your particular conditions. The magma expelled by volcanoes, for example, forms rocks in direct contact with the surface; therefore, they will form more quickly. These rocks are called extrusives. Rocks whose magma comes from the depths of the Earth's subsoil result in slower cooling and are called intrusive. These are rocks that originate when the magma reaches the Earth's surface and causes cracks in the crust.
how many calories of energy are available in the bodies of the creatures that eat the plankton
Answer: 8,000 calories
Hey guys can anyone help me? I have been stuck on this one for a while.
The diagram below shows the branching tree diagram for cats.
(The diagram is at the bottom)
Which shared derived characteristic do reptiles, marsupials, and dogs have?
1)Amniotic egg
2)Fur
3)Retractable claws
4)Shearing teeth
OPTION A.
Reptiles, marsupials, and dogs share the characteristic of having an Amniotic egg, which is a major development in their evolutionary history allowing them to reproduce on land. Other listed traits are not shared by all these groups.
Explanation:The shared derived characteristic that reptiles, marsupials, and dogs have is the Amniotic egg. This type of egg is a major evolutionary innovation that allowed these groups to reproduce on land. Inside the Amniotic egg, the embryo is surrounded by a fluid-filled sac, the amnion, protecting it from desiccation. The other characteristics mentioned, like fur, retractable claws, and shearing teeth, are not shared by all of these groups. For instance, reptiles do not have fur, and not all marsupials and dogs have retractable claws or shearing teeth.
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Osteoporosis is a disease that affects the bones and leads to an increase in bone fractures. Osteoporosis is most likely to be affected by which cycle? water phosphorus
Answer:
The answer is the phosphorus cycle. Osteoporosis is the loss of bone mass due to loss of mineralization of bone hence making the bone weak and spongy thence prone to fractures. Phosphates, and calcium, is one of the minerals used to make bone strong by filling in the spaces in between the osteocytes and collagen of bone.
Answer:
Its B
Explanation:
go ahead...
what's the term for the phenomenon of a hurricane pushing water towards the shoreline
A. Storm surge
B. Tsunami
C. Rip tide
D. Wave cluster
Answer:
storm surge
Explanation:
Answer:
Storm surge
Explanation:
A storm surge, storm flood, tidal surge, or storm tide is a coastal flood or tsunami-like phenomenon of rising water commonly associated with low-pressure weather systems, such as cyclones. It is measured as the rise in water level above the normal tidal level, and does not include waves.
Plz help. A behavior that an organism is born with is called a(n)
A. Innate behavior
B. conditioned behavior
C. Imprinted behavior
D. Learned behavior
The act of an organism is referred to as behavior. It can be of different types. The one that an organism is born with is inborn behavior, i.e., option A.
What is inborn behavior?Inborn behavior is genetically acquired by an organism and can be performed in response to a factors without prior experience.
Some actions, such as the knee-pull reflex and the nursing reflex of human infants, are inborn behaviors.
Thus, the correct option is A.
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Which phenotypic change is genetic?
A. the flower color in a population changes overtime.
B. Plants in a field are smaller than usual after a drought.
C. An individual cuts his hair and changes its color.
D. A person with fair skin gets severely sunburned.
Answer:
The answer is a
Explanation:
A is the only answer that happened over time and is with a whole population. The others are just something that happens immediately or are caused by an outside factor. Genetics happen inside the organism.
Give an example of a theory in science
Answer:
Scientific theories are testable and make falsifiable predictions. They describe the causes of a particular natural phenomenon and are used to explain and predict aspects of the physical universe or specific areas of inquiry. For example the big bang theory
Many bacteria are able to pass small pieces of the hereditary information on their DNA from one bacterial cell to another. This can sometimes result in an increase in the number of drug-resistant bacteria. What name is given to the process by which one bacteria transfers DNA to another? A) sporolysis B) conjugation C) gametic transfer D) haploid translocation
Answer:
The process in which one bacteria transfers DNA to another is called conjugation.
Explanation:
Conjugation is the process of transferring genetic material from one bacteria to another through direct cell contact. In the process of conjugation one bacteria acts as donor and transfer the DNA to a recipient. There is a specific DNA sequence present in Donor's DNA called fertility factor (F factor). F factor helps in the formation of pillus which is the site of genetic material transfer.
what are the functions of the different types of RNA in protein synthesis.
I need a paragraph, pls will give brainliest!!!
Answer:
First you have the mRNA or the messenger RNA. They are responsible for delivering the code from the DNA in the nucleus, to the ribosomes, where proteins are synthesized. The next would be the rRNA or the ribosomal RNA which are found in the ribosomes. They help with translation, or amino acid assembly. They bind with the next type of RNA, which is the tRNA. The transfer RNA or the tRNA carry the amino acids to the template from the mRNA. Each tRNA have a specific amino acid on them and they act as an adapter, between the mRNA code and the amino acid it carries. It translates the mRNA code to amino acid, to form the protein specific to the instructions of the DNA.
What are the characteristics of Archaebacteria
Answer:
Explanation:
Only archaebacteria are capable of methanogenesis
Archaebacteria who use other forms of cellular respiration also exist, but methane-producing cells are not found in Bacteria or Eukarya.
Unique cell membrane chemistry. Archaebacteria have cell membranes made of ether-linked phospholipids,
Some protists can reproduce both sexually and asexually. What's a major advantage of each?
A. Sexual reproduction increases genetic diversity, and asexual reproduction can be more rapid.
B. Sexual reproduction can be more rapid, and asexual reproduction allows the organism to produce an exact copy of itself.
C. Sexual reproduction is less prone to making genetic mutations, and asexual reproduction increases genetic diversity.
D. Sexual reproduction allows the organism to produce an exact copy of itself, and asexual reproduction can be more rapid.
Answer:
(A). Sexual reproduction increases genetic diversity, and asexual reproduction can be more rapid.
Explanation:
Sexual reproduction is a mode of reproduction, which involves formation of new organisms by combination of genetic information from two organisms of different sexes. The major advantage of sexual reproduction is to develop genetic diversity as new organism is produced by mixing up genetic material of both the parents.
On the other hand, asexual reproduction involves formation of new organisms from a single parent having identical genetic makeup as present in parent cell. One of the major advantage of asexual reproduction is to produce high number of offspring in less time as it is more rapid than sexual reproduction.
Thus, the correct answer is option (A).
Answer:
A. Sexual reproduction increases genetic diversity, and asexual reproduction can be more rapid.
Explanation:
Mafic lava tends to have low silica content. Based on this, which of the following statements about mafic lava is most likely true?
A. It contains fewer volatile gases.
B. It flows slowly.
C. It has higher viscosity.
D. It contains more volatile gases
Answer:
option a is correct it contains fewer volatile gases.
A specific atom of molybdenum has an atomic number of 42 and a mass number of 96. How many protons are in this atom of molybdenum?
Answer:
42
Explanation:
The mass number of an atom is equal to the number of protons plus the number of neutrons in a nucleus
This atom Mo-96 has an atomic number of 42 and so has 42 protons in the atom.
The atomic number of molybdenum is 42 and mass number is 96. . Number of protons in the molybdenum has 42 protons.
Molybdenum:Molybdenum is used to make alloys. It is d block element. Atomic number of molybdenum is 42. Molybdenum has very high melting point. Molybdenum is essential element present in plants and animals. There are about 50 different enzymes which contain molybdenum.
Atom is the smallest particle. It contains subatomic particles such as protons, neutrons and electrons. Atom contains nucleus at its center. It contains protons and neutrons.
Electrons revolve around positively nucleus. Atom contains same number of protons which is equal to its atomic number.
Therefore, The atomic number of molybdenum is 42 and mass number is 96. Number of protons in the molybdenum has 42 protons.
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which product is the result of light reactants in photosythesis
The Light Reactions of Photosynthesis. Light is absorbed and the energy is used to drive electrons from water to generate NADPH and to drive protons across a membrane. These protons return through ATP synthase to make ATP.
What is the end product of light reaction in photosynthesis?
The energy from sunlight is converted into a small amount of ATP and an energy carrier called NADPH. Together with carbon dioxide, these are used to make glucose (sugar) through a process called the Calvin Cycle. This is the things happening during light reaction of photosynthesis .
Hope this helps:)
Which statement best describes the relationship between an allele and a gene?
A. An Allele is a variation of a gene that can be expressed as a phenotype.
B. An allele is the part of a gene that attaches to messenger RNA molecules.
C. An allele is the primary protein made by a gene found in a developing embryo.
D. An allele is a segment of a DNA molecule that controls replication of a gene.
Answer: A
Explanation: bc reasons. If u need/want an explanation call SAAAAARRRRAAAAAAHHHHH
A is the ans for your question
When is the Earth closest to the sun?
when it is summer in the Northern Hemisphere
during the vernal equinox
when it is winter in the Northern Hemisphere
during the autumnal equinox
Answer:
when it is summer in the Northern Hemisphere
Explanation:
The Earth is closest to the Sun in early January, during winter in the Northern Hemisphere. This closest point is called perihelion. Option C is correct.
The Earth is nearest to the Sun during the time known as perihelion. This happens toward the beginning of January, regularly around January third. This reality may shock to some, as it implies the Earth is nearest to the Sun during winter in the Northern Side of the equator. This variation in distance from the Sun is caused by the Earth's slightly elliptical orbit. Subsequently, Northern Side of the equator winters are to some degree milder in light of the fact that the Earth gets more sun powered energy during this period, while summers are milder too because of the Earth being at its farthest separation from the Sun around the July fourth period, known as aphelion.Complete question as follows:
When is the Earth closest to the sun?
A. when it is summer in the Northern Hemisphere
B. during the vernal equinox
C. when it is winter in the Northern Hemisphere
D. during the autumnal equinox
Which force most likely created this mountain?
Answer:
The movement of tectonic plates was the force that most likely created this mountain.
Explanation: Hope this helps!
Answer:
A. Compression
Explanation: