Answer:
Seed is a fertilized mature ovule of the flower meant for reproduction. Seeds of angiosperms contains seed coat, embryo and endosperm. A seed also contains embryo and nutritive tissue
Explanation: hope this helps :)
A seed contains an embryo, a food supply known as the endosperm, and a protective outer layer called the seed coat. The embryo is the undeveloped plant, the endosperm provides necessary nutrition, and the seed coat offers protection until conditions are favorable for germination.
A seed contains several essential components that help it give rise to a new plant. The embryo within a seed is a miniature undeveloped plant that has the potential to grow into a new plant under the right conditions. This embryo contains the beginnings of the radicle (which will become the root), the hypocotyl (the stem), and one or two cotyledons (seed leaves).
The endosperm is an important part of the seed that acts as a food store, providing nutrition for the embryo. The type of nutrients in the endosperm can include proteins, carbohydrates, and fats, allowing the embryo to sustain itself until it is capable of producing food through photosynthesis.
Finally, the seed coat, also known as the testa, is the outer layer of the seed that offers protection. It keeps the embryo safe from environmental threats like diseases and insects and prevents water from entering the seed prematurely, which would start the germination process before the optimal conditions are met.
When a scientist is conducting research about all the plants and wildlife in the Mojave Desert as well as the desert’s resources, such as water and soil, the scientist is studying
Answer:
ecosystem
Explanation:
In this case, we have a situation where the scientist is describing an ecosystem. The ecosystem represents all the living organisms (flora and fauna), their environment, and the interactions that they all have between each other. In this case, we have the plants and animals being described, thus the flora and fauna, as well as the water and soil, thus their environment, so we have description of an ecosystem, or more specifically, the desert ecosystem of the Mohave Desert.
Answer:
an ecosystem
Explanation:
The inside of a membrane bilayer is
Answer:
hydrophobic
Explanation:
the hydrophobic ends which is "water fearing" faces inwards so that it does not interact with the water or liquid outside the membrane
Answer:
The correct answer will be- hydrophobic
Explanation:
The plasma membrane of a cell is composed of lipids commonly called phospholipids.
The phospholipid structure contains a hydrophilic head and a hydrophobic tail.The phospholipids in a plasma membrane are arranged in two layers called bilayer.
Bilayer contains the hydrophilic head faces the external environment whereas the hydrophobic tail composed of fatty acids is present inside and provide hydrophobic character to the layer.
Thus, inside the membrane is hydrophobic.
Select the words that correctly complete the statement.
_____ is an example of optimal health. To gain optimal health, the first step is to ______
1 ) the absence of disease
1) a high protein diet
1) sufficient sleep
1) taking a variety of vitamins and mineral supplements
1) the perfect body
2) eat healthy
2) establish practical goals
2) establish priorities
2) establish realistic goals
2) improve intellectual health
The absence of disease is an example of optimal health. To gain optimal health, the first step is to eat healthy.
According to the question;
We are required to select the words that correctly complete the statement.For the first blank space;
A very good indicator of optimal health is; The absence of disease.For the second blank space:
To gain optimal health, it is pertinent that one eats healthy.Read more:
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What is the most likely explanation for how speciation occurs
Answer:
when populations of a species that share the same habitat become reproductively isolated from each other.
Explanation:
Answer:
Natural selection is one explanation how speciation occurs.Explanation:
Natural selection is a key mechanism of evolution, in which survival and reproduction differences affects the evolution process.
It's important to say that Natural Selection is related with only phenotype's act, because it's due to environmental changes, adapting to those variables in order to survive.
Which organelles are found only in plant cells?
Answer:
c) cell wall , vacuole
Explanation:
What is the typical source of well water?
A. A holding tank
B. A discharge zone
C. A geyser
D. An aquifer
Answer:
an aquifer
Explanation:
Give examples of selective advantage of organism’s body part/organ
Answer:
The characteristic of an organism that enables it to survive and reproduce better than other organisms in a population in a given environment; the basis for evolution by natural selection.
Explanation:
where do the respiratory and circulatory systems meet?
Answer:
B
Explanation:
Halogens are destructive to ozone because they are highly reactive with oxygen. Please select the best answer from the choices provided T F
Answer:
True
Explanation:
Halogens belongs to the seventh group on the periodic table. This group contains the most reactive set of elements that we have. They require just an electron to achieve a noble and stable electronic configuration.
When halogens mostly in form of ChloroFluoroCarbons(CFCs) reaches the atmoshpere, ultraviolet rays release chlorine atoms which easily breaks away an oxygen atom from ozone. Ozone thereby turns into an oxygen gas with two oxygen atoms instead of three. This reaction depletes the ozone layer.
The chemical reactions that cells use to acquire and use energy to live, grow an reproduce are called
Metabolism refers to all of the chemical reactions occurring within cells that allow them to acquire and use energy, categorized into catabolic and anabolic pathways. Catabolic reactions break down complex molecules, releasing energy, while anabolic reactions build complex molecules and require energy.
Explanation:The chemical reactions that cells use to acquire and use energy to live, grow, and reproduce are collectively called metabolism. Metabolism encompasses all of the biochemical processes that take place within cells, which can be broadly categorized into two main types: catabolic and anabolic pathways. Catabolic pathways are the metabolic reactions that break down complex molecules into simpler ones, releasing energy in the process. On the other hand, anabolic pathways construct complex molecules from simpler ones and require an input of energy. These metabolic pathways are part of a larger field known as bioenergetics, which is concerned with the flow of energy through biological systems. Overall, metabolism maintains the cell's energy balance through the interplay of catabolic and anabolic reactions.
Final answer:
Cellular metabolism refers to all the chemical reactions in cells that are essential for acquiring and utilizing energy needed for survival, growth, and reproduction. It includes both energy-releasing catabolic reactions and energy-consuming anabolic reactions, all of which are regulated by enzymes within the realm of bioenergetics.
Explanation:
Cellular metabolism is the term used to describe the collection of chemical reactions that occur within cells to acquire and use energy necessary for the cells to live, grow, and reproduce. This encompasses a wide array of processes that include both catabolic reactions, which break down molecules to release energy, and anabolic reactions, which build up complex molecules requiring energy. Under the umbrella of bioenergetics, these reactions are crucial for energy flow through living systems and are regulated by enzymes to ensure the cell can function properly.
Understanding cellular metabolism is essential because it is the biochemical basis of life for all organisms. Whether a cell is taking in nutrients, synthesizing new components, or mobilizing energy reserves, it is the metabolic reactions that make these life-sustaining activities possible. Overall, cellular metabolism is a dynamic network of interconnected chemical reactions that are fundamental to biological systems.
explain the concept of conservation of natural resources
Answer:
The Earth's natural resources include air, water, soil, minerals, fuels, plants, and animals. Conservation is the practice of caring for these resources so all living things can benefit from them now and in the future.
Answer:
he or she is right
Explanation:
Secondary pollutants are more harmful than primary pollutants.
The statement is generally true: secondary pollutants are often more harmful than primary pollutants.
Primary pollutants are substances that are directly released into the environment from human activities or natural sources. These pollutants include emissions from vehicles, industrial processes, and natural events like volcanic eruptions. While primary pollutants can have detrimental effects on human health and the environment, they are usually present in relatively high concentrations near their sources and can be easier to identify and control.
On the other hand, secondary pollutants are not directly emitted but are formed through chemical reactions involving primary pollutants and other atmospheric components. These reactions occur in the atmosphere under specific conditions, such as sunlight, temperature, and the presence of other reactive substances. Examples of secondary pollutants include ground-level ozone (formed from the reaction of nitrogen oxides and volatile organic compounds), smog, and some forms of particulate matter.
Secondary pollutants are often more harmful than primary pollutants for several reasons. Firstly, they can be present in lower concentrations, making them harder to detect and control. Their formation is dependent on specific atmospheric conditions, which can vary spatially and temporally, leading to localized and unpredictable exposure. Secondly, secondary pollutants can have more adverse health effects due to their chemical properties. For example, ground-level ozone is a strong respiratory irritant and can contribute to respiratory problems and other health issues. Thirdly, secondary pollutants can persist in the atmosphere for longer periods, leading to the potential for long-range transport and widespread impacts.
While the general statement holds true, it is important to note that the harm caused by pollutants depends on various factors, including their concentration, duration of exposure, individual susceptibility, and the specific pollutant in question. Nevertheless, the formation and presence of secondary pollutants can contribute significantly to the overall environmental and health risks associated with air pollution.
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11. What's a recharge area?
A. The part of an aquifer where groundwater meets a lake or stream
B. The part of an aquifer where surface water reaches the water table
C. The part of an aquifer that's located between two aquicludes
D. The part of an aquifer that's located at a lower elevation
Answer:
B. The part of an aquifer where surface water reaches the water table
Explanation:
The recharge area of an aquifer, is the area where the aquifer comes in touch with the surface water. At this area, the aquifer is receiving new and fresh water reserves from the surface, thus replenishing the water that it has lost. Most of this water comes from the rainfall and runoff, though rivers and streams can also contribute to it. The recharging of the aquifer is crucial for its existence, as it constantly loses water, and the recharging in giving back water to it, thus balancing the lost and gained water in it.
Answer:
B
Explanation:
Waianapanapa Beach in Hawaii is a black-sand beach that was formed by
waves crashing against volcanic rock. The sand can be very hot on sunny
days. Which statement best explains why?
O
A. The black sand has no heat capacity.
B. The black sand absorbs no radiation.
O
C. The black sand is immune to insolation.
D. The black sand has a low albedo.
Answer:
The black sand has a low albedo.- D.
Answer:
d
Explanation:
good luck
Name any 3 methods of irrigation and briefly describe them.
Nutrients can also be provided through irrigation to the crops. The different sources of water for irrigation are wells, lakes, ponds, canals, tubewells and even dams.
What is irrigation?Irrigation is defined as the process of applying water to the crops artificially to realize their water requirements.
The three important methods of irrigation are sprinkler, surface, and drip/micro.
Water flows over the soil by gravitation force for surface irrigation. Sprinkler irrigation, also known as spray irrigation, is a means of dispensing water in a regulated manner, comparable to rainfall. Pumps, valves, pipes, and sprinklers may be used to disperse the water. Irrigation sprinklers can be used in a variety of settings, including residential, industrial, and agricultural.Drip irrigation entails laying tubing with emitters next to the plants on the ground. The emitters trickle water into the root zone of the soil slowly. Plant production and quality improve as moisture levels are maintained at an appropriate level.For more information regarding irrigation, visit:
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PLEASE HELP THIS IS URGENT!
Which chemical is most important in telling a plant when to flower?
phytochrome
nitrogen
carotenoid
chlorophyll
The chemical that is most important in telling a plant when to flower is phytochrome.
Which chemical is most important in telling a plant when to flower?Phytochrome is a blue-green pigment found in many plants, which regulates various developmental processes.Phytochrome is widely distributed in the plant kingdom. Although green leaves are the organs, which perceive daylight most effectively, their phytochrome content is very low. For this reason, most studies with phytochrome have used etiolated seedlings from which phytochrome has been obtained in highly purified form.The light receptors of plants are Phytochrome Red and Phytochrome Far Red. They are both color pigments found in leaves. They are chemically reactive and absorb red light at specific wavelengths. This chemical reaction tells the plant whether to continue vegetating or flowering.Hence, the phytochrome chemical is most important in telling a plant when to flower.
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New generations are better suited to their environment than the first generation. What is this called?
Answer:
Descent with modification
Explanation:
We define evolution as descent with modification from a common ancestor.
Evolution only occurs when there is a change in gene frequency within a population over time. These genetic differences are hereditary and can be passed on to the next generation - which is what really matters in evolution: long-term change. In this process, the new generations are better suited to their environment than the first generation because of descent with genetic modification.
Final answer:
New generations are better suited to their environment than the first generation due to evolution by natural selection. Individuals with advantageous traits tend to survive, reproduce, and pass these traits to their offspring, leading to better adapted future generations.
Explanation:
The phenomenon where new generations are better suited to their environment than the first generation is known as evolution by natural selection. This process occurs because the members of a population have genetic variability, which results in some individuals having traits that give them a biological advantage in specific environmental conditions. These individuals are more likely to survive and reproduce, passing on these advantageous traits to their offspring. Over time, these traits become more common within the population, making future generations progressively better adapted to their environment.
Which two protists evolved from a symbiotic relationship of organisms, which resulted in eukaryotic organisms containing chloroplasts?
The protist which evolved from the endo-symbiotic relationship is Euglena and green algae.
Endosymbiosis is the phenomenon of engulfing one organism which can live in a symbiotic relationship within. it has deeply impacted the evolution of life.
The correct answer is Endosymbiosis and protist.
What is the endosymbiotic process?
The symbiotic relationship in which one organism lives with the other is called endosymbiosis. Primary endosymbiotic refers to the early internalization of prokaryotes by eukaryotic progenitor cells, leading to the formation of mitochondria and chloroplasts.
Belongs to diverse taxonomic groups, especially unicellular, sometimes colonial, or, more rarely, multicellular, usually protozoa, most algae, and often some fungi (such as slime). ), Which belongs to the kingdom of eukaryotes (protozoa, synonymous with Protoctista).
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Which sequence represents a cross section of the bilayer
A hydrophilic head, hydrophobic tail, hydrophobic tail, hydrophilic head
B hydrophobic tail, hydrophilic head, hydrophobic tail, hydrophilic head
c hydrophobic head, hydrophilic tail. hydrophilic tail, hydrophobic head
D hydrophilic tail, hydrophobic head, hydrophobic head, hydrophilic tail
The answer you are looking for is a
Which statement about natural selection is true?
A.
Natural selection and evolution are two terms for the same phenomenon.
B.
Natural selection is an outdated theory to explain how evolution took place.
C.
Natural selection is the process by which organisms with more beneficial traits are more likely to survive and reproduce.
D.
Natural selection is the process by which organisms develop variation in traits, which gives them a better chance of survival.
The answer is C. Natural selection is about ones traits being better than another’s which allow it to survive in the wilds longer.
Answer:
C.
Natural selection is the process by which organisms with more beneficial traits are more likely to survive and reproduce
Explanation:
Natural selection is a driving force for evolution that operates of genetic variations. The individuals with beneficial genetic traits are able to survive and reproduce more as compared to the other individuals with no beneficial traits.
This differential reproductive and survival rate of organisms due to adaptive genetic traits is called natural selection.
When listing the levels of organization in organisms from smallest to most complex, which level is just below organs in
complexity?
Answer:
tissues
Explanation:
I hope this helps you.
Match the following items
1. Rr
2. rr
3. Identical alleles
4. Unlike alleles
5. RR
()homozygous, recessive
()homozygous definition
()heterozygous, dominant cell
()heterozygous definition
() homozygous, dominant cell
Answer:
2. homozygous, recessive
3. homozygous definition
1. heterozygous, dominant cell
4. heterozygous definition
5. homozygous, dominant cell
Explanation:
The land biomes are named for their
A. Large animals?
B. Predominant vegetation
C. Average climate
D. Physical location
Predominant vegetation
Providing immunity by injecting the body with a weakened form a pathogen is known as
Answer:
vaccination
Explanation:
The vaccination has been one of the most revolutionary inventions in the medical field. This invention helped protect people from numerous diseases, some being totally neutralized, while some having only minor effects on the human body. The vaccination basically is a way of enhancing the immune system of the body by injecting in it a weakened form of the pathogen. In this way, the weakened form of the pathogen is not capable to harm the body, and the body is not fighting against it, but instead the pathogen becomes part of the body and its defense mechanism, so when the pathogen strikes, the body has a counter attack and defeats it.
Answer:
vaccination
Explanation:
Which is a function of nucleic acids
Answer:
Nucleic acids are important because they make up genetic information in living things. There are two types of nucleic acid and they are DNA and RNA. DNA is the basic instructions for living things. It is passed down from parent to offspring and is found in the nucleus of the cell.
Explanation:
Answer:
store genetic information
Explanation:
Which step of the scientific method relies more heavily on newly collected data than on creativity and innovation?
drawing a conclusion
designing an experiment
solving a problem
formulating a question
Answer:
The best possible answer is: Drawing a conclusion.
Explanation:
in orde to write a conclusion report on an experiment you need the data collected from the experiment. Designing the experiment requires too much trial and error. formulating the question is purely a made up idea until tested. However, solving a problem depends on wether it is after the experiment or during. If it is after than you are most likely using information from the experiment, in this case it could be the right answser. If it is during then the it is about what you can do to fix something that went wrong in the experiment. I hope this helps you!
When a human or animal consumes food, the carbon in that food is most likely to be converted into which of the following elements?
a. carbon remains carbon
b. nitrogen
c. oxygen
d. hydrogen
Answer:
The answer is A
Answer:
a. Carbon remains carbon
Explanation:
The study of DNA provides evidence that all living things are related through
evolution by showing that all species
Answer:
it's d has the same genes
The answer is option B - The study of DNA provides evidence that all living things are related through evolution by showing that all species read the genetic code in the same way.
All species read the genetic code in the same way, indicating a common ancestry and supporting the theory of evolution.
The study of DNA provides substantial evidence that all species are related through evolution by showing that all species read the genetic code in the same way. This is apparent from the universal use of the same set of genetic instructions across different forms of life, demonstrating a common ancestry. By comparing genetic sequences, scientists have mapped out the relationships among various species, constructing what is known as the "tree of life."
This tool illustrates the connections between organisms, with many sharing significant genetic traits and DNA sequences, such as humans and chimpanzees sharing about 98% of their genes, indicating a recent common ancestor.
Which part of a cell carries the genetic material? Cell membrane Cell wall Chloroplast Nucleus
Answer:
nucleus carries the genetic material
A food web in a rain forest is shown below. Which of the following most likely occupies the location marked X in this food web?
A. decomposers
B. primary consumers
C. producers
D. secondary consumers
E. abiotic factors