From about 450 to 300 million years ago, bryophytes dominated the earth's vegetation, and then about 300 million years ago, gymnosperms began to become more prominent.
Evolution of plantsAbout 450 to 300 million years ago, most of the plants as we currently have them are yet to evolve according to evolutionists.
Instead, seedless vascular plants such as bryophytes were around. Many years after, these seedless plants evolved into vascular plants with seeds that are not enclosed in fruits.
Vascular plants with seeds but without fruits are known as gymnosperms. Plants whose seeds are enclosed in fruits, angiosperms, evolved thereafter.
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Why is there competition in nature?
A. Living organisms are influenced by abiotic factors.
B. Ecosystems are composed of habitats and communities.
C. There are more living things than there are resources to support them.
D. Environments are constantly changing as organisms interact.
Answer:
c
Explanation:
Competition exists in nature due to the limited availability of resources compared to the abundance of living organisms. This creates a struggle for survival and dominance among species, leading to an ongoing process of natural selection. Thus, correct option is C.
Because there are more living things than there are resources to support them, competition is a natural phenomenon. There is a limited supply of food, water, shelter, and other survival-related essentials in the Earth's ecosystems. As a result, in order to meet their demands and ensure their survival, organisms must contend for these scarce resources.
This rivalry is essential to the process of natural selection because it increases the likelihood that organisms with beneficial characteristics or adaptations will survive and pass on their genes to the following generation. Because only those with the strongest adaptations flourish in a certain habitat, this eventually drives the evolution and specialization of species.
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Which of these cell organelles is MOST
like a post office in that it receives,
packages/modifies, then sends
proteins and other cellular material?
the mitochondria
the Golgi body
Answer:
the golgi body
Explanation:
the golgi body
Answer:
Golgi body receives, packages/modifies, then sends proteins and other cellular materials to various destinations. So, it is MOST like a post office.
Explanation:
The Golgi bodies are made up of 4 to 8 cup-shaped, series of compartments known as cisternae which are flattened, disk-shaped, stacked pouches and connected by tubular connections.
Golgi bodies has following functions:
Its main function is the packaging, modification and secretion of proteins. It receives proteins from Endoplasmic Reticulum. It packages it into membrane-bound vesicles, which are then transported to various destinations, such as lysosomes, plasma membrane or secretion. They also take part in the transport of lipids and the formation of lysosomes.Enzymatic processing and post-translational modification occur near the membrane surface in Golgi bodies, e.g. phosphorylation, glycosylation, etc.Golgi apparatus is the site for the synthesis of various glycolipids, glycoproteins, etc.#SPJ2
A particular plant has two alleles that control the length of its stem. t represents the dominant allele that codes for a tall stem, and t represents the recessive allele that codes for a short stem. based on the punnett squares, which two statements are true about the genotype of the plant’s stem length?
A particular plant has two alleles that control the length of its stem. T represents the dominant allele that codes for a tall stem, and t represents the recessive allele that codes for a short stem. Based on the Punnett squares, which two statements are true about the genotype of the plant’s stem length?
First Generation
__t_ t
T Tt Tt
T Tt Tt
Second Generation
__T_ t
T TT Tt
t Tt tt
Select all the correct answers.
A) Plants with short stems are homozygous for that trait.
B) Plants with tall stems are always homozygous for that trait.
C) Both parent plants in the second generation are heterozygous.
D) Both parent plants in the second generation are homozygous.
The correct answers are options A and C.
How, explain your answer briefly?The Statement A says that the plants, which have a short stem is homozygous for the trait. According to the question, the allele for the short height is recessive. A recessive trait can only be observed, when the dominant allele is not at all present. Hence, the plant must have tt allele, so, the plant having short stem would be homozygous recessive.
The statement C says that the both parents in second generation are heterozygotes. It is given that the parents in the second generation have aa genotype Tt. In this case, both the alleles are different, hence, the parent plants are heterozygotes.
Thus, this could be the answer.
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Perspective influences how a person looks at a piece of art and its qualities.
a.
always true
c.
always false
b.
sometimes true
d.
Perspective is not relevant in the interpretation of art.
Please select the best answer from the choices provided
A
B
C
D
Answer:
D.
Explanation:
d.
Perspective is not relevant in the interpretation of art.
17. When transcription occurs in eukaryotic cells, a DNA strand is copied to an mRNA strand that contains introns and exons. Which of the two is needed for the
production of proteins, and why?
Exons because they are coding sequences.
Introns because they are non-coding sequences.
Introns because they are coding sequences.
Exons because they are non-coding sequences
Answer:
Exons because they are coding sequences
Explanation:
The sections of DNA (or RNA) that code for proteins are called exons.
As an individual ages, new neurons and dendrites appear, but others atrophy. Compared to when they were adolescents, adults have fewer neural connections and their brain size _____ as they continue to age.
The brain and central nervous system shrink as we age.
What happens to the brain when we age?The brain is one of the most important organs in our body because all the nerve signals are produced there for our body to function.
In the brain we find nerve connections through neurons. A particular aspect of them is that during childhood and adolescence they multiply as we learn new things.
However, once we reach the stage of old age, these nerve connections deteriorate and are reduced, therefore, the size of the brain and the central nervous system decreases.
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What is cladistics?
OA. The comparison of species based on common behavioral
characteristics
B. The comparison of species based on their geographic range
C. The comparison of species based on the presence or absence of
ancestral traits
D. The comparison of species based on common physical
characteristics
The comparison of species based on common physical characteristics Thus, the correct option is D.
What is cladistics?Cladistics is a method of biological taxonomy that organizes taxa in a branching hierarchy so that all members of a given taxon share the same ancestors and defines taxa uniquely by shared traits not present in ancestral groupings.
Clades, which are collections of organisms made up of an ancestor species and its offspring, are also identified through cladistics.
A cladogram only displays one probable phylogeny for a collection of organisms. It can shed light on the process of evolution. A cladogram should not be viewed as a representation of genuine evolutionary processes, though. It may or may not depict what actually occurred. It merely illustrates what might have occurred.
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Susan makes a claim that humans do not evolve because we adapt to situations by changing our technology, not ourselves. which piece of evidence contradicts this idea? humans have been using tools for a long time. other primates also use tools. the size of our brains has increased since humans started using tools. our technology is always increasing.
The correct answer is option C.
The size of our brains has increased since we became tools users.
Researchers have proved that using modern technology gadgets not only modifies our brain functioning, but also stimulates our brain to make it more active.
Humans do not evolve because we adapt to situations by changing our technology, not ourselves.
What term describes a plant's response to external stimuli like light, gravity, and touch?
According to the research, a tropism is a plant's response to external stimuli like light, gravity, and touch.
What is a tropism?It is the response that plants or certain organs of them make to a stimulus that comes from the outside.
There are different classes of tropisms according to the nature of the stimulus, gravitropism, phototropism, heliotropism among others.
Therefore, we can conclude that according to the research, a tropism is a plant's response to external stimuli like light, gravity, and touch.
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In the Exploration, the color of the bugs evolves over the course of a few generations. Give another real world example which can support Darwin’s theory.
Dog with the good smell survive in the environment as compared to bad smell.
What is another example that supports Darwin's theory?Another example of Darwinian theory is that if dogs that have a good sense of smell are better able to survive as compared to dogs without a good sense of smell. So those dogs that have this ability increase in number because those with a bad sense of smell die out.
So we can conclude that dog with the good smell survive in the environment as compared to bad smell.
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Water in central taxis comes from the Edwards aquifer tends to be hard which of the following would you expect to find in this water
The hard water from Edwards aquifer will likely contain dissolved calcium trioxocarbonate (iv) or magnesium and calcium tetraoxosulphates (iv).
What is hard water?Hard water refers to water that contains dissolved minerals in it.
The hardness of water may be temporary or permanent hardness.
Temporary harness is caused by trioxocarbonates of calcium in water.
Permanent hardness is caused by magnesium and calcium tetraoxosulphates.
Thus, the hard water from Edwards aquifer will likely contain dissolved calcium trioxocarbonate (iv) or magnesium and calcium tetraoxosulphates (iv).
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A patient is being treated by her urologist for a fourth episode of kidney stones. Analysis of the stones shows that they are composed of calcium oxalate. The urologist orders an assay of which hormone?.
Answer:
Parathyroid hormone (PTH)
The urologist orders an assay of PTH hormone.
What is PTH hormone?Parathyroid glands release a hormone called parathyroid hormone (PTH) that regulates the amount of calcium in your blood. It also regulates the amounts of vitamin D and phosphorus.
Parathyroid hormone over- or under-production might result in symptoms linked to abnormal blood calcium levels.
Parathyroid glands produce and release a hormone called parathyroid hormone (PTH) to regulate the amount of calcium in your blood, not in your bones. One of the most crucial and prevalent minerals in your body is calcium.
Therefore, The urologist orders an assay of PTH hormone.
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When do we use a fluorescence microscope?
A fluorescence microscope is used when one wants to image specific features of small specimens such as microbes.
What is a fluorescence microscope?A microscope that uses fluorescence to form an image.
Fluorescence microscopy has wide applications due to its high sensitivity, specificity and simplicity. It can be applied to living cells and organisms.
Fluorescence microscopy is used to view the features of small specimens such as microorganisms.
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Who was the first person to classify organisms into two groups
The first person to classify organisms into two groups was Aristotle, but Lineu was recognized as the father of taxomy
Who were the main scholars of biological classification?One of the central figures in the history of biological classification was the Swedish naturalist Carl von Linné, popularly known in our country as Linnaeus (1707-1778). His classification system encompassed all organisms and was based on the similarities between them.
Moreover, Aristotle, as far as is known, was the first to classify living beings. He divided them into two groups: animals and plants.
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What is a spring tide? When and why does it occur?
Answer:
Spring tides happen just after every full and new moon, when the sun, moon and earth are in line. That's when lunar and solar tides line up and reinforce each other, making a bigger total tide.
A spring tide occurs when there's a new or full moon. Because it follows the moon's lunar cycle, a spring tide happens twice per month. With the moon and sun roughly aligned the tides of Earth are on average slightly larger than usual.
source: https://ntslf.org › about-tides › tides
Why was natural selection an important contribution to the theory of evolution?
OIt proved that evolution is true.
OIt explained how evolution works.
OIt summarized the process of evolution.
It highlighted the main points of evolution.
OIt summarized the process of evolution.
Where is the nucleus located in a neuron ?
The nucleus located in a neuron It is located in the cell body.
Which part of the neuron is its nucleus located?Neurons have as basic parts the cell body, dendrites and axon. Cell body: The cell body is the region where the nucleus of the neuron is located, as well as most of its organelles.
in this case, the cell body, or perikaryon, is the portion of the neuron that contains the nucleus and the cytoplasm that surrounds the nucleus.
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write the categories of classification in hierarchical sequence
Answer:
these are the seven taxonomic units:
Kingdom -it has the largest number of members and also the largest taxonomic unit
phylum (animals)/division (plants)
class
order
family
genus
species-it has the least number of members who freely interbreed to give rise to an infertile of spring
Explanation:
hope you got it! if there's any question feel free to ask .good day.
Answer:
Kingdom
Phylum/division
Class
Order
Family
Genus
Species
Explanation:
formulae
King
Philip/David
Can
Order
For
Green
Soaps
Why some plants like a citrus plants bear thorn ?
5 things unique to photosynthesis
5 things unique to photosynthesis are:
All living things depend on the organic molecules that are synthesized by plants as a result of photosynthesis.Photosynthesis is not unique to plants. Other organisms are also capable of photosynthesis.Photosynthesis is dependent on the presence of the pigment chlorophyll.In photosynthesis, light energy is converted into chemical bond energy.Photosynthesis occurs in the daytime.What is the co-factor during photosynthesis?The co-factor during photosynthesis is Nicotinamide Adenine Dinucleotide Phosphate.(NADP), and not NAD. The latter is a coenzyme in respiration for ferrying H+(as NADH+) together with FADH+ from Kreb's Cycle into the matrix of mitochondria for oxidative phosphorylation, needed for ATPs synthesis,
Thus, this could be the answer.
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EASYYY IM TIRED, IVE BEEN ON 2 REDBULLS TRNA STAY AWAKE DOING HW. I NEED HELP WITH THIS ONE QUESTION SO I CAN GTS!!!!
What would happen if you decreased the amount of light available to the model biosphere?
Answer:
the Vajpayee is a term that ecompasses all the ecosystem from the Earth it there for increase both non living elements like sunlight and water and leaving organisms
Explanation:
hope it is helpful
Answer:
Explanation:
: There's only one stable, long-lasting biosphere that we know of. It's the Earth. It shouldn't surprise you that human attempts to create sealed systems don't generally fare very well. The International Space Station, despite efforts to recycle everything possible (including converting urine to drinkable water--do you still want to be an astronaut?) to reduce costs, couldn't sustain life for long without a steady supply of provisions from, and garbage hauling back to, Earth. You know they try hard because, if all goes as planned, it costs about $10,000 to put a pound of payload (supplies) into Earth orbit. The BioSphere 2 project in Southern Arizona was an interesting and costly effort, but the original studies weren't very scientific and it proved quite difficult to keep just a handful of humans alive for a relatively short period of time. You can buy tiny sealed marine ecosystems enclosed in glass. They are beautiful curiosities, but the one I bought for my wife lasted less than a year before crashing. Among the crazier justifications for space exploration is that when (note the assumption of inevitability) we ruin the Earth, we will need new places to live (and, presumably, ruin). Unless or until we can do a lot better at building self-contained ecosystems, it would be a far better use of human effort to focus on preserving the only one we've got. Not only that but, if we make the Earth uninhabitable, I'm not sure we deserve to live somewhere else. But the challenge itself is interesting, and the scientific questions you can ask in the process of understanding, building, and trying to maintain such a system are valid. We're going to give it a try. Good luck! There's a Nobel Prize in it.
The indigestible part of a plant is called ____. protein carbohydrates fats fiber
Roughage, also known as Dietary Fiber is the indigestible part of a plant.
Answer:
fiber
Explanation:
simply indigestible made of fiber tho
Cell theory states that all living things contain one or more cells. why do you think chill theory meets the definition of a scientific theory? Do you think it should be a scientific law? Explain your response.
The cell theory meets the definition of a scientific theory, yes because the scientific theory refers to the well-proven explanation of aspects of the natural world.
What does the cell theory claim?Cell theory states that all living things are composed of cells, the basic structural and organizational unit of all organisms, and that all cells come from pre-existing cells.
The cell theory is a scientific theory because it managed not only to theorize but also to prove in a way that supports the arguments of a scientific theory. When a theory can be proved in general, it becomes a law, so yes it could be a law.
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PLEASE HELP MEEE WITH THIS QUESTION
Answer:
2) 6) 3) 4)
Explanation:
The following factors will affect the current oxygen and carbon dioxide levels.
Burning fossil fuels increases the output of CO2 outside of organisms that perform cellular respiration-CO2 is a green house gas and is a cause of global warming. burning fossil fuels will increase CO2 in the atmosphere which cannot be balanced by the natural sinks like forests and oceans.Deforestation reduces the number of photosynthetic organisms able to produce oxygen and consume carbon dioxide. Deforestation causes habitat loss and hence a large amount of tree cover is lost which will reduce the amount of oxygen generated and CO2 absorbed.When land is deforested for agriculture, the photosynthetic productivity of crops is not equivalent to the forests being replaced. This is so because forests have large trees and plants which have a greater photosynthesis capacity however new crops which are small and are removed annually are not able to compensate for the loss of large forest trees.learn more about oxygen and carbon dioxide levels here:
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What happened if the temperature was too high for enzymes
If the temperature was too high for enzymes they would be denatured which is why they have optimum temperature they work with.
What is Denaturation?This occurs when the structure of a protein is modified as a result of various factors.
Such factors include high temperature which results in the structure being changed and leads to the enzyme losing some properties needed for action.
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Beverly and Carl are in a race. Their graphs show the data.
A graph with horizontal axis time (seconds) and vertical axis velocity (meters per second). An orange line labeled Beverly starts at 0 seconds 0 meters and goes straight to 10 seconds 15 meters and then to 50 seconds 35 meters. A blue line labeled starts at 0 seconds 0 meters and goes straight to 10 seconds 10 meters and then to 50 seconds 30 meters.
Which best describes the race?
Even though for a majority of the race they accelerated at the same rate, Beverly won because hethe r initial acceleration was greater than Carl’s.
How, explain your answer?The given parameters are listed as follows:
For Beverly: initial time of motion, t₁ = 10 s
initial velocity, u = 15 m/s
final time of motion, t₂ = 50 s
final velocity, v = 35 m/s
For Carl: initial time of motion, t₁ = 10 s
initial velocity, u = 10 m/s
final time of motion, t₂ = 50 s
final velocity, v = 30 m/s
In summary, Beverly and Carly had the same average acceleration for the majority of the race but the initial acceleration of Beverly was higher than that of Carl, hence Beverly won the race.
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Answer: c
Explanation: Even though for a majority of the race they accelerated at the same rate, Beverly won because her initial acceleration was greater than Carl’s.
The effects of molecules other than substrate on allosteric enzymes are called
The heterotropic effect is the effect of molecules other than substrate on allosteric enzymes.
What is the heterotropic effect?
The term "allosteric enzymes," which derives from the Greek "allo," which means "other," refers to enzymes that have a second site in addition to the active site. Enzymes can have many allosteric sites, which are these. They stand out because they can react to many circumstances in their immediate surroundings.Unrelated to the enzyme's substrate, a regulatory molecule is referred to as a heterotropic allosteric effector. The enzyme binds to can either be activated or inhibited by it.Carbon dioxide ([tex]CO 2[/tex]) is an excellent example of a heterotropic allosteric effector because it also functions as an effector of hemoglobin but is not an enzyme-substrate.To learn more about allosteric enzymes refer to: https://brainly.com/question/13150990
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The same DNA strand is analyzed in four species of fish. Two species have more identical nucleotides than the others.
What does this mean?
A.They look more similar in appearance.
B.They are more closely related.
C. They do not share a common ancestor.
D. They are less closely related.
Answer:
It means that they are closely related.
Explanation:
If a wire carrying an electric current is placed in a magnetic field, a force is produced. What name is given to this effect?
Answer:
The Motor Effect
Explanation:
:)
Answer:
The Motor Effect
Which of the following form(s) zygote (2n)?
Sperm + Ovum
n + n
Male gamete + Female gamete
All of the choices
Answer:
All of the choices
Explanation:
The n stands for 23 chromosomes, every cell has 46 chromosomes so 2n.
Male and female gametes have just n (23 chromosomes)
n + n = 2n
sperm and ovum are synonyms for the gametes