Answer:
Parallel veins in the leaf
Explanation:
The leaf veins run parallel to one another.
Which gas is increasing in content and causing concern about the Earth's energy
budget?
Carbon Dioxide
Nitrogen Gas
Argon Gas
CFC gases
Answer:
Carbon Dioxide
Explanation:
Answer:
Carbon Dioxide
Explanation:
animals and humans breath in air and they create carbon dioxide which trees need so it's good but people use factory and stuff that makes mass carbon dioxide which is not good.
Which of the following parent combinations could result in a type o blooded child?
Answer:
1 parent heterozygous A and 1 parent heterozygous B
Explanation:
One parent already has O and then the other is AB so its not a full dominate
1 parent heterozygous A and 1 parent heterozygous B could result in a type O blooded child. So, the correct option is D.
What is Blood group?A blood type is defined as a classification of blood that is based on the presence and absence of antibodies and inherited antigenic substances on the surface of red blood cells. These antigens can be proteins, carbohydrates, glycoproteins, or glycolipids, depending on the blood group system.
There are 4 main blood groups which are- A, B, AB and O. Blood group is determined by the genes inherited from the parents. Each group can be RhD positive or RhD negative, which means there are 8 blood groups in total.
For the above example, when Heterozygous A blood group parents crossbreed with Heterozygous B blood group parents that is AO and BO respectively. AB, BO, AO and OO blood groups from the cross produce offspring.
Thus, 1 parent heterozygous A and 1 parent heterozygous B could result in a type O blooded child. So, the correct option is D.
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id- 5121786233 p/w- tepQ3w
Answer:
I need 1 Brainliest before I can become Virtuoso
Explanation:
Answer:................. I just needed the points so I can get help on my math work........
Explanation:
Use the scenario to answer the following question.
A forest ecosystem is home to mountain lions, coyotes, bobcats and deer.The deer eat grass. The mountain lions, coyotes, and bobcats eat deer. Hunters began killing large numbers of mountain lions, coyotes, and bobcats. About twenty years later, the deer population had largely increased. The teacher asked the students to explain why the population of deer had a large increase in population size.
Which student’s argument MOST accurately explains the increase in the deer population?
A. Student 2: The number of deer increased because without mountain lions, coyotes, and bobcats, the deer lived longer and had more offspring that also lived longer.
B. Student 3: The number of deer increased because with fewer mountain lions, coyotes, and bobcats, the deer had more food available to eat.
C. Student 1: The number of deer increased because deer populations are always increasing, even when there are mountain lions, coyotes, and bobcats preying on them.
D. Student 4: The deer population increased because with fewer mountain lions, coyotes, and bobcats, there was less competition within the deer population.
Answer:
A
Explanation:
The mountain lions, coyotes, and bobcats control the deer population hence in their absence the deer life span increased.
A parents traits are inherited by offspring in the form of dna carried on
Answer:
Is this a true or false question? If so, this statement is true.
Explanation:
Describe the similarities and differences between plant and animal cells
Answer:
Plant cells have a cell wall and a cell membrane.
In plants, the cell wall surrounds the cell membrane.
Animal cells have a cell membrane but no cell wall.
Plant cells have cytoplasm.
Both have a nucleus.
In the experiment, "Do white cats eat more than black cats?" the independent variable would be:
the color of the cat.
how much each cat weighs.
how much food each cat eats.
the temperature of the food.
In the given experiment, the independent variable would be the color of the cat. Thus, the correct option for this question is A.
What is an Independent variable?An independent variable may be defined as a type of variable that significantly and effectively stands alone and isn't changed by the other variables you are trying to measure. The independent variable is the cause. Its value is independent of other variables in your study.
According to the context of this question, the color of the cat would not depend on how much food a particular type of cat eats. This will depend on the nature and diet of the cat along with its physiology and pattern. So, the color of the cat would be thought to be the independent variable in the experiment because it does not make any sense in the eating cat.
Therefore, in the given experiment, the independent variable would be the color of the cat. Thus, the correct option for this question is A.
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factors affecting environment and development
Answer:
Environmental factors affecting plant growth and development include light, temperature, water, humidity, and nutrition. At the time of nurturing a tree, it is important to know how these factors could affect the growth and development of a plant. Knowledge about environmental factors helps the owner promotes proper growth.
name the consumers:
scavengers, omnivores, herbivores, carnivores
Answer:
Jaguars and frog are carnivorous, lizard is omnivorous, whereas sloth, monkey and butterfly
Explanation:
Jaguars, frog, lizards, are carnivorous which feeds on meat of other organism whereas sloth, monkey and butterfly are herbivorous which feeds on plants. Jaguar feeds on Capybaras, deer, tortoises, fish, birds and monkeys etc, frog feeds on insects and lizard also eats insects as well as plants so it is omnivorous while on the other hand, sloth lives on the trees so feed on plants, butterfly feeds on flower's nectar and monkey feeds on the fruits present on the trees.
Cichlids, a type of fish, were introduced to a lake around 200 years ago. Over the years, the fish have developed into two distinct groups. One group stays in the main lake and the other group resides in the streams that flow into it. Both groups of cichlids breed in the same streams at the same time of year. However, the groups are splitting into two genetically and physically different types of fishes. How would you classify this type of speciation
Answer:
sympatric speciation
Explanation:
Different sympatric species have the same closest ancestor and live in the same area but inhabiting different niches.
The steps for sympatric speciation are:
An ancestral species inhabit a geographic area.With time, different populations of the same species occupy different niches or microhabitats in this general area. As the microhabitats are different, they have different environmental pressures that are acting on each population.These pressures lead to the origin of differences between groups, which need to adapt to each environmentEach population suffers genetic changes due to environmental conditions. These changes are inheritable.With time, these differences drive to the final complete divergence of populations, becoming different species and reproductively isolated.In sympatric speciation, the interruption of genetic flow must be fast, and there must be differences in niches so no species can compete and displace the other species. Speciation occurs in the same distribution area of the original species. The new species originate in a place with no physical barriers but different environmental pressures.
In the exposed example,
The introduced Cichlid fishes 200 years ago → Original species and the common ancestor between the new derivated speciesThe lake → general geographic areaThe main lake and the streams → Microhabitats or niches with different pressures eachThe groups are splitting into two genetically and physically different types of fishes. They do not mate. There is no genetic flow between groups. → Speciation process.How many chromosomes are made by using a cell "c"
Answer:
In humans, each cell normally contains 23 pairs of chromosomes, for a total of 46. Twenty-two of these pairs, called autosomes, look the same in both males and females. The 23rd pair, the sex chromosomes, differ between males and females.
Explanation:
Genetic engineering techniques can be used when analyzing and manipulating DNA and RNA. Scientists used gel electrophoresis to study transcription of gene L and discovered that mRNA strands of three different lengths are consistently produced. What explanations best accounts for this experimental result?
Answer:
the precursor messenger RNA (pre-mRNA) of the L gene underwent alternative splicing, thereby producing three different mRNAs that have different lengths
Explanation:
In eukaryotic organisms, transcription produces a precursor mRNA (pre-mRNA), which is a non-processed RNA sequence that contains both non-coding regions (i.e., introns) and coding regions (i.e., exons). Subsequently, this pre-mRNA is converted into a mature messenger RNA (mRNA) by a process known as 'alternative splicing', where introns are removed and exons and exons spliced together to form a contiguous coding sequence. During alternative splicing, differential combinations of exons can be produced from the same gene, producing different mRNAs with different lengths.
The experimental results with the gel electrophoresis of the transcription of mRNA are due to the alternative splicing.
What is alternative splicing?The genes are the codes that are enabled the formation of the DNA and RNA by expression. The transcription is the process of formation of mRNA from DNA template.
The mature mRNA is formed by the alternative splicing of the introns and the joining of exons for the functionalization. The process of alternative splicing results in the formation of the mRNA of multiple length.
The gel electrophoresis bands resulted have multiple length of mRNA. The results are the explanation for role of gene L in alternative splicing of mRNA.
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The supporting paragraphs in a research essay are built on:
A. your opinions about works of literature.
B. accepted rhetorical conventions.
C. bibliographical entries to your works-cited list.
O D. the information you gather during the research process.
Answer:
D
Explanation:
What type of organic molecule (carbohydrates proteins lipids nucleus acids) does DNA hold the instructions to make
Answer: macromolecules
Explanation:
Answer:
Proteins
Explanation:
DNA sequences are "codes" that ultimately make proteins.
Why dos a single X chromosome that carriers the allele for red-green color blindness cause males to be color blind but doesn’t cause females to be color blind?
Answer:
Because females have two X chromosomes and the red-green color blindness allele has to be in both chromosomes to cause the woman to be color blinded. In the case of males, they only have one X chromosome, so if the allele for red-green color blindness is in the chromosome, the male will be color blinded since there is no other X chromosome with the normal allele as in females.
Explanation:
What determines if a person's sex is the genes X and Y. A sperm carries one of these two genes. When it meets the egg, this one will give the other chromosome, which is always X. So, if the sperm carries the X chromosome, the result, when the egg's fertilized, will be XX, which will give the information to develop a female human. If the sperm carries the Y chromosome, the result will be XY, which is a male.
As females are XX, if the red-green color blindness gene is in one of them, the other chromosome, which does not have this allele, will prevent the woman from being color blinded. We can say that women have a backup copy that prevents color blindness.
In the case of males, as they are XY, there is no extra copy that can prevent them from being red-green color blinded, so when a male has an X chromosome with this allele, they will be color blinded. In the case of women, they will only be carriers of the gene and will be color blinded if the two X chromosomes have the red-green color blindness allele.
The offspring of the round-seed allele and the wrinkled-seed allele will have the ___________ phenotype
Answer:
4738hrjeifgt47ruj3
Explanation:
Explain how body plan and anatomy enables tunicates to perform the essential functions it needs to survive.
Explain how tunicates fit into the cladogram of chordates
Answer:
lthough rarely eaten by humans, tunicates are an important link in the food chain and thus indirectly provide humans with a source of food. Tunicates contain some unusual chemicals, and some of these may prove useful as drugs. Tunicates are considered acraniate chordates because tunicates and chordates have the following features in common: a notochord; a dorsal, hollow nerve cord; and pharyngeal gill slits at some time in their lives.
Explanation:
What is the name often given to the force exerted by the first object on a second object?
Explain what is “bottleneck” and why genetic drift is more powerful in small populations.
Answer:
because more is being forced through
Explanation:
Answer:
A bottleneck in genetics is an event that kills off or isolates a large portion of the population.
Explanation:
The more individuals in a population, the greater the genetic diversity. A genetic bottleneck happens when the number of individuals in a population gets greatly reduced. This happens as a result of random chance. For example, a storm might come through and knock down a bunch of trees. Birds that live in the trees may get harmed and those that survive now have to find a new home, so they migrate to other areas leaving behind a small population. This is important because the fewer individuals there are, the less genetic diversity and therefore, the less ability of the population to adapt. If you have lots of different genes available and a new disease arises in the population, it's more likely that some individuals will survive. If you only have a few genes available, it is less likely any individuals will survive. This can lead to really quick adaptation and evolution of a species.
Helicase is an enzyme responsible for unwinding the double helix of the DNA by breaking apart the hydrogen bonds between each of the base pairs. Which phase of the cell cycle is helicase most likely active? s M G1 G1
Answer:
G1 Phase
Explanation:
A community ecologist would most likely study A. population growth of a single species. B. interactions among individuals of different species living in a small area. C. the cycling of matter through biotic and abiotic components of a geographical area. D. interactions among individuals of the same species living in a small area. E. energy flow through an ecosystem.
Answer:
The correct answer is B. interactions among individuals of different species living in a small area.
Explanation:
A community ecologist studies the set of populations of organisms of different species that inhabit and interact with each other in the same place for a period of time. The ecological community has to be studied as a unit or set and not independently each species of living beings that forms and interacts, that is, their distribution, organization, quantity, demography and reciprocity between the different populations that cohabit are included. Likewise, the main perspective of a community ecologist is found in the interrelationships between populations depending on the genotypic and phenotypic characteristics determined.
A rock contains a radioactive isotope that decays to half of its original
amount in 5 million years. When this rock formed, it was made up of 100%
of the radioactive isotope, and 0% of the new element that it decays
If you find this rock and analyze it, and find that it contains only 50% of the
radioactive isotope and 50% of the new element, how old must this rock
be? *
1) 2.5 millon years
2) 10 million years
3) 5 million years
4) 15 million years
Answer:
3) 5 million years
Explanation:
The rock is 5 million years old because the rock contains only 50% of the radioactive isotope. We know that this rock decays to become half in 5 million years. Initially, the rock has 100% of radioactive isotope and 0% of the new element that forms with the decaying of the rock. But 50% of the radioactive isotope decays and 50% of the new element is formed so we can say that it reaches to its half age which is 5 million years.
The figure shows a Paramecium, a single-celled freshwater protist. The hairlike
structures visible on the Paramecium allow it to move. These structures are
microfilaments.
True
False
而)
Answer:
This should be true
Explanation:
hope it helps
It is not enough to be in the presence of a pathogen like a bacteria or virus, there also needs to be an environment in which the pathogen can grow.
a. True
b. False
Explain Darwin’s theory of evolution
Answer:
Charles Darwin's theory of evolution states that evolution happens by natural selection. Individuals in a species show variation in physical characteristics. As a consequence those individuals most suited to their environment survive and, given enough time, the species will gradually evolve.
Explanation:
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Answer:
what do they mean when they say "spheres" ???
It could be the lithosphere (land) hydrosphere (water) and the atmosphere (air)
Explanation:
if the water molecules are evaporating then there's obviously water involved (hydrosphere)if the water started to evaporate from the ground then lithosphere is involved, too. and the water is rising into the atmosphere, also.
Evolution acts at the level of the
Answer:
evolution acts on phenotypes on the individual level but evolution is at the population level
Explanation:
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What does DNA have to do before a cell divides?
Answer:
DNA is copied
Explanation:
How do native plants respond after a degraded marsh has been restored to a healthy marsh?
Answer: slate
Explanation:
(a) Describe a method to measure the mean number of weeds per m’in each field.
Answer:
Describes the role of monitoring in adaptive management. ... each vegetation attribute and advice on field techniques and tools are provided. ... If you are using sampling to estimate population sizes or mean values (such as density, ... obtain the true average number of plants per quadrat (4 plants/quadrat).
Explanation:
Quadrat method is the most widely used method for population determination in plants and small immobile organisms.
What are the methods for population determination?The Quadrat method is the most useful method for population determination for immobile organisms such as plants or for very small and slow-moving organisms. The plots used in this method is called quadrats, which may be used to determine the population size and density of a population. Here, each quadrat marks off an area of the same size which is typically, a square area or other shape such as circular or other within the given habitat.
The most accurate way to estimate the weed population is to count the number of plants in an area of known size at a different number of locations. Through the use of a quadrant, which may be square or circular in shape weed plant counts can be carried out.
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