Which part of the plant is directly involved in sexual reproduction?
1.A
2.B
3.C
4.D
Answers
A because this is where the pollen is. so when bugs stand on here they take the pollen somewhere else and by accident they spread it. I hope this helps :}
Flowers reproduce sexually through pollination. Flowers have male stamens and female pistils. The component of the stamen known as the anther is the part that houses the pollen grains. Therefore, option (A) is correct.
What is sexual reproduction in plants?Pollination is the process that allows flowering plants to carry out their sexual reproduction.
In flowering plants, sexual reproduction requires the development of distinct male and female gametophytes, which are responsible for the production of gametes. Pollen grains, which are male gametophytes, are produced by the anthers of the plant. The grains of pollen adhere to the stigma at the top of a carpel, which is the part of the reproductive structure that contains the female gametophytes (ovules).
Therefore, option (A) is correct.
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Related Questions
Which kingdom includes only multi cellular heterotrophs whose cells lack a cell wall
Answers
The answer is Animalia.
I hope this helps!
Cheers, July.
This map uses red arrows to show the direction and magnitude of tectonic plate movement. Predict which major plate will move the most over the next 500 years
Answers
b its b i know this question african
Answer:
Pacific
Explanation:
Which of these four cells has the largest actual size?
I want to double check if my answer is wrong. I choose image B
Answers
The correct answer is B.
Which of the following diseases is not explained by germ theory? (1 point)
malaria
HIV
cancer
flu
Answers
Cancer is caused by unregulated cell division, and not by any type of germ. Cancer, therefore, could not be explained by the germ theory. Malaria is a protozoan, HIV and flu are both viruses.
what takes place in the nucleus of a cell? replication, transcription, or translation?
Answers
The answer is transcription.
Trascription is the process in which the information in the cell's DNA is used as a template to create RNA.
Nucleic acids are made up of a sugar, a nitrogenous base, and a _________ group.
A.phosphate
B.cellulose
C.substrate
Answers
Answer:A phosphate
Explanation:
just got a 100 on the usa test prep for bio
the cells in your body produce wastes as a result of metabolic processes. Body systems work together to remove these wastes in order to keep your body healthy. Circle the letters of the systems the work together to remove cellular wastes. Select all that apply.
A. Circulatory C. Excretory E. Nervous G. Urinary
B. Digestive D. Muscular F. Respiratory
Answers
For waste removal of cells ; there are many organs and in this question they are A , C, G , F !!
A. Circulatory system : Transport all waste
C. Excretory system: Removes Urea, and other wastes .
G . Urinary bladder is under excretory system as it stores the waste
F. Respiratory system is one of important organs that transport waste out of body as CO2 !! CO2 is a cellular waste amd thus F is also right !!
If you have any doubt ; comment !!
The Circulatory, Excretory, and Respiratory systems work together to remove cellular wastes and maintain body health. A, C and F are the correct options.
The cells in your body produce wastes as a result of metabolic processes. Various body systems work together to remove these cellular wastes and maintain your body's health.
The correct systems involved in removing cellular waste are:
A. Circulatory: This system transports waste products, such as carbon dioxide, from cells to organs responsible for excretion.C. Excretory: This includes the lungs, skin, and kidneys, which are all involved in removing wastes. For instance, the lungs exhale carbon dioxide, the skin releases sweat, and the kidneys filter blood to produce urine.F. Respiratory: This system helps remove carbon dioxide, a byproduct of cellular metabolism, from the body through breathing.Other systems listed, such as the Nervous, Muscular, Digestive, and Urinary systems, contribute to body function but are not primary in excreting cellular wastes.
How does a protein kinase cascade work? What does it do to the original signal?
Answers
Answer:
A protein kinase is an enzyme which catalysis the phosphorylation reaction.
The phosphorylation can either activate or deactivate other proteins or receptors.
A protein kinase cascade refers to the series of events in which a chain reaction of phosphorylation takes place by which thousands of proteins are phosphorylated.
It helps in signal transduction through which signals (usually hormone) from outside the cell are amplified and transferred to the target molecule present inside the cell.
For example, tyrosine kinase cascade.
A protein kinase cascade is a process in signal transduction where a protein kinase enzyme initiates a series of phosphorylation reactions, triggering cellular responses. It enhances the efficiency and speed of the hormonal response and leads to significant changes in the cell's environment. This process amplifies the original signal, leading to precise and quick cellular responses.
Explanation:A protein kinase cascade is a crucial biological process in signal transduction within a cell, contributing to cellular responses to external stimuli. This process gets triggered by the activation of a protein kinase enzyme which initiates a series of reactions. These reactions involve the phosphorylation of specific molecules by enzymes known as kinases. In other words, the kinases add phosphate groups to proteins, resulting in changes in the proteins' shape and hence activating or inactivating them. Second messengers, examples being cAMP and Ca²+, are often utilized to transmit signals within a cell.
This kinase cascade boosts the efficiency, speed, and specificity of the hormonal response. It can initiate thousands of signaling events almost instantly, even in response to a very low concentration of hormones in the bloodstream. Subsequent to the ligand binding to the cell surface receptor, this sets off a chain of events, leading to a reaction that causes changes in the cell's environment. These changes could include an increase in metabolism or specific gene expression amongst others. Ultimately, the original signal gets amplified and precise responses are generated rapidly.
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1. Plasmodium is a ___________ which causes ____________ in humans.
2. _____________ changes nitrogen of air into ammonia.
3. A drug that kills bacteria._______________
Level 2
4. Why viruses lie in the borderline of living and non-living? 5. Streptococcus, Lactobacillus, Vibrio Cholerae
How are these microorganisms a) similar and b) different? 6. Find the odd one out and give a reason for your choice. a) amoeba, volvox, paramoecium, euglena
b) i. Mushrooms are eaten as food.
ii. Used in fermentation of alcohol
iii. Grows on leather footwear.
7. Why does milk take longer time to form curd in winter than in summer? 8. Why should buildings be painted before rainy season?
Level 3
9. Microorganisms are found in the intestine of certain animals.
Name the microorganisms. _________________
Which component of food is digested by them? ________________
10. We make pickles at home. Do we use any natural preservative in it? ______ Which are the preservatives used? ___________________________________ 11. Why do AIDS patients have low immunity?
12. My mother forgot to keep the extra idli dough in the refrigerator after use on a summer day. At noon she found that the dough was overflowing and had become very sour. How did this happen?
Answers
1. parasite - infections in red blood cells
2. The Haber process
3. Antibiotic
4. They do not share all characteristics of living things, however they have a genetic material.
5.
6)
a> Amoeba. A pseudopod that has no definite shape.
b> iii. Grows on leather footwear.
A distinguishable element of the earth’s crust such as a continent, mountain, valley, rift, or island is called a(n)
Answers
A distinguishable element of the earth's crust is called a landform.
Explanation:A distinguishable element of the earth's crust such as a continent, mountain, valley, rift, or island is called a landform. Landforms are the physical features on the Earth's surface that are created through natural processes such as tectonic activity, weathering, and erosion.
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Label each image as containing atoms only, molecules that are not compounds, or compounds.
Answers
The second one is a compound
The third one is molecules that are not compounds
The last one is a atom
Answer:
Images 1 and 4: atoms
Image 2 : compounds.
Image 3 (yellow doublets): molecules that are not compounds.
Explanation:
Atoms are the smallest entity and are made of three subatomic particles: protons, electrons and neutrons.
Two or more atoms are bonded together to form a molecule. A molecule can have atoms of same or different elements.
Compounds are the molecules that have atoms of different elements only.
Image 1 and 4 represent atoms while image 2 represents compounds. Image 3 (yellow doublets) represents molecules that are not compounds.
Which molecule can diffuse from the digestive tract into human bloodstream without first being digested?
Answers
Glucose can diffuse from the digestive tract into human bloodstream without first being digested.
Explanation:
Glucose is a respiratory substance which is ready to undergo oxidation.
Answer:
Glucose.
Explanation:
Glucose can diffuse first from the digestive tract into human bloodstream without being digested. Glucose gets digested in both the stomach and small intestine. When the food gets digested in the stomach then the carbohydrate present in the food breaks into smaller molecules of sugar which is also known as glucose.
The stomach and small intestine both absorbs the glucose and release it into bloodstream. That's why our body needs to store glucose for energy.
what is the metric unit for measuring length?
Answers
Meters are correct you have centi, milli, kilo
The metric unit for measuring length is the meter, defined as the distance light travels in 1/299,792,458 of a second in a vacuum. For larger or smaller lengths, multiples or fractions of the meter (such as kilometers, centimeters, or millimeters) are used.
Explanation:The metric unit for measuring length is the meter (m). This was initially defined as 1/10,000,000 of the distance from the North Pole to the equator but has been updated for precision. Nowadays, it is defined as the distance light in a vacuum travels in precisely 1/299,792,458 of a second.
Regardless of the length being measured, the metric system uses the meter as the base unit. To accommodate different magnitudes of length, we use multiples or fractions of the meter. For very long distances, we use kilometers (1 km = 1000 m = 10³m), while for shorter distances, we use centimeters (1 cm = 0.01 m = 10⁻² m) or millimeters (1 mm = 0.001 m = 10⁻³ m).
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Species that reproduce sexually have greater genetic diversity than species that reproduce asexually. Why is this the case
Answers
Answer:
Sexual reproduction gives path to genetic variability, which is crucial for both evolution and survival of the species.
Explanation:
Question: It is hard to believe, but the desert and the tundra have a lot in common! The most obvious is that both biomes have little available water. What plant adaptations would you expect to see in these two biomes? Include four adaptations you might see in BOTH biomes.
Answers
Some adaptations you would expect to see on plants growing in both biomes are Low-growing plants, Waxy leaves to protect against evaporation, Ability to grow in soils with very low nutrients and water, and The ability to quickly bloom and reproduce when conditions are right. Hope this helped!
The table shows data about the percentages of gases in air inhaled and exhaled. The gases are oxygen (O2), nitrogen (N2), and carbon dioxide (CO2).
Assume the volume of air inhaled and exhaled is 500 mL. Calculate the difference (in mL) between the amount of oxygen inhaled and the amount of oxygen exhaled.
A. 22.85 mL of oxygen
B. 4.57 mL of oxygen
C. 104.7 mL of oxygen
D. 81.85 mL of oxygen
Answers
Answer:
A. 22.85 mL of oxygen
Explanation:
Data:
The total volume of Oxygen =500 mL.
Percentage of Oxygen inhaled= 20.94 %
Amount of Oxygen inhaled =20.94 /100 x500 ml
=104.7 ml
Percentage of Oxygen exhaled = 16.37 %
Amount of Oxygen inhaled =16.37 /100 x500 ml
=81.85 ml
Difference b/w amount of oxygen inhaled/exhaled= 104.7 ml-81.85 ml
=22.85 ml
Therefore, Option A is correct option.
Hope it help!
iqta is right and for the next part:
Which of these conclusions can be made from the data in the table?
it is Cellular respiration uses oxygen.
Cellular respiration produces carbon dioxide.
:)
In the body cells of most organisms, oxygen is used to release ________ for use by the cells. A) urea B) sugar C) energy D) carbon dioxide
Answers
Answer:
The answer is C. energy
Explanation:
Answer:
c) energy i took it on usatestprep
True or False. The arrow labeled C represents a transfer of chemical energy to mechanical energy. Explain why this is true or false.
Answers
I believe this is False because from c to d does not use mechanical energy.
Answer:
False
Explanation:
Water isn't mechanical energy
I'm sorry if it's wrong
HELP QUICK!!
A scientist observes debris added to a landform from a melting glacier. This is evidence for which type of natural process?
Physical weathering
Chemical Weathering
Erosion
Deposition
Answers
It may be deposition
Deposition is the answer
Below are statements that describe either traits that follow the typical pattern of Mendelian inheritance or sex-linked inheritance patterns. Sort them into the proper place.
Answers
The following statements Sex-linked traits:
Hemophilia. A trait like color-blindness, which affects many more men than women. A trait that is linked to the X chromosome. These are not equally likely to occur in males and females.The following statements are Mendelian trait:
Involves a dominant and recessive allele. A trait like eye color or height . Predisposition to some diseases like diabetes and heart disease .These are equally likely to occur in males and females.
Answer:
sex linked trait
Haemophilia Trait that is linked to X chromosomeA trait like color-blindness, which affect many more men than womenThese are not equally likely to occur in male and femaleMendelian trait
A trait like eye colour or height These are equally likely to occur in male and femaleInvolves a dominant and recessive allelePredisposition to some diseases, like diabetes and heart diseasesExplanation:
Sex linked trait are those traits whose inheritance is based on the sex of individuals. The genes are usually located on the sex determining chromosomes as opposed to non-sex determining chromosomes or autosomes.
The frequency of occurrence of sex linked trait is more in a particular sex than the other. For example, baldness is more often found in men than in women, hence, baldness can be said to be sex linked. Other examples include hemophlia, color-blindness, etc.
Mendelian trait on the other hand are traits whose genes are located on autosomes. They inheritance usually follow simple dominance/recessive style and are equally likely to occur in male and female. Examples include hair colour, height, and diseases such as diabetes, etc.
as a cell becomes larger what happens to its surface area and volume
Answers
if the cell grows beyond a certain limit, not enough material will be able to cross the membrane fast enough to accommodate the increased cellular volume.
As a cell becomes larger, its volume increases faster than its surface area. This difference in growth rate can limit the cell's size, as the surface area might not be able to meet the metabolic demands of the increased volume.
Explanation:As a cell becomes larger, its volume increases at a significantly higher rate compared to its surface area. This phenomenon is due to the mathematical principles of scaling. Essentially, volume, which is spatial and involves three dimensions (length, width, and height), increases exponentially (by the power of 3) whereas surface area, which only incorporates two dimensions (length and width), increases quadratically (by the power of 2).
This difference in growth rates could lead to a problem. When a cell's size increases, its metabolic demand also grows. Metabolic demands are met by the materials that enter the cell from its surface area (like oxygen and nutrients). So, if a cell becomes too large, the surface area might not be sufficient to support the increased volume, thereby limiting the cell's size.
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An individual who is observing and evaluating one’s goal-oriented performance is demonstrating which phase of the self-regulation cycle? A. self-reflection B. performance C. forethought D. goal accomplishment
Answers
Answer:
a. self reflection
Explanation:
correct on quiz
edge2020
Answer:
The answer is self reflection.
Explanation:
It is pretty simple when you start to understand it.
The speed of sound is at 300 feet below the sea than at 200 feet.
slower
faster
Answers
the answer is faster
Determine whether the characteristics describe DNA replication in prokaryotes only, eukaryotes only, or both prokaryotes and eukaryotes.
Answers
Explanation:
DNA replication is a process common to both prokaryotes and Eukaryotes with few differences and similarities.
Differences:
1. Origin of replication (ori) : is a sequence of the genome where initiation of replication takes place. Prokaryotes have only single ori while eukaryotes have multiple ori as the DNA is large in eukaryotes so require multiple or to replicate whole DNA.
2. Replication site: prokaryotes lack nucleus where DNA is present in the cytoplasm while eukaryotes posses nucleus which encloses DNA. Therefore, replication takes place in cytoplasm in prokaryotes while in the nucleus in eukaryotes.
Similarities:
1. Enzymes: both posses same enzymes for DNA replication like DNA helicase, primase, polymerase.
2. The direction of synthesis: the enzyme DNA polymerase synthesizes new strand of DNA in the same direction that is 5' to 3' direction.
Thus, marked answer in the table are correct answer.
Answer:
Explanation:
I took the test
help I don't get it what does this mean
Answers
so the first one is sodium chloride
second one is Magnesium oxide
Third one is Calcium hydroxide
You just have to write them in their word form;
1 - 3 molecules of sodium chloride.
2 - 4 molecules of magnesium oxide.
3 - [tex](OH)^{2}[/tex] stands for "hydroxide" and can be added to many different molecules.
Hope it helped,
BioTeacher101
How are atoms in molecules being rearranged into different molecules
Answers
We are talking about chemical reaction here. In a chemical reaction, substances that react are called reactants, and substances which are formed are called products. Atoms in the reactants break their bond, rearrange themselves and form new bonds to make the product. So no atoms are added or removed, which is called law of conservation of atoms/mass.
The rearrangement of atoms in molecules into different molecules occurs through chemical reactions, where bonds are broken and formed so that atoms achieve a stable electron configuration. Thus, atoms are not destroyed but simply rearranged into different molecular structures. An example given was the formation of a water molecule.
Explanation:The rearrangement of atoms in molecules into different molecules involves breaking and forming of chemical bonds. This process is driven by chemical reactions, where atoms exchange, accept or donate electrons to achieve stable electron configurations, often in line with the octet rule. This involves the outermost shell of an atom, which is most stable when filled with electrons. As an example, let's take a water molecule (H2O), which consists of two hydrogen atoms and one oxygen atom. In an exchange reaction, the atoms in the reactants break their existing bonds and form new ones, effectively rearranging into a new molecule.
During a chemical change, it's important to note that atoms are neither created nor destroyed, but are merely rearranged into different substances. The substances that participate at the beginning of a reaction are called reactants, and those that result from the reaction are called products.
Therefore, chemical reactions involve the reassembly of atoms into different molecular structures, which is facilitated by the breaking and forming of bonds according to atomic stability and the electron configuration.
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a women who is a carrier of hemophilia, marries a man who is not a carrier. what are the possible genotypes of their children?
Answers
The possible genotypes of the children could be "XX, XY, XX^h, Y^hX"
They could have 50% regular girls with one being a carrier. 25% of a male who does not have it, and 25% chane of male who does have it.
Drugs are substances that produce physiological or psychological effects in humans. True False
Answers
I believe it is determined by the drug, but true
Final answer:
Drugs indeed produce physiological or psychological effects in humans, which is true. They include various categories such as hallucinogens, depressants, and stimulants, and can be consumed in different ways. Psychoactive drugs in particular affect the central nervous system and can lead to addiction and abuse.
Explanation:
Drugs are substances that produce physiological or psychological effects in humans. This statement is true. Drugs are chemical substances that can bring about changes in an organism's physiology or psychology when consumed.
Drugs are distinct from food and substances that provide nutritional support. They can be administered in various ways, including inhalation, injection, smoking, ingestion, absorption via a transdermal patch, suppository, or dissolution under the tongue.
There are several categories of drugs that operate on human physiology, including hallucinogens, depressants, and stimulants. Researchers and medical professionals classify drugs according to their effects on the body and mind.
Psychoactive drugs, such as caffeine and alcohol, affect the central nervous system and influence nerve impulse transmission in the brain. These types of drugs can lead to addiction and abuse, signified by tolerance, withdrawal symptoms, physical dependence, psychological dependence, and the potential need for increased dosages due to increased tolerance.
Explain the difference between the "leading strand" and the "lagging strand" in DNA Replication
Answers
One of these is called the leading strand, and it is replicated continuously in the 3' to 5' direction. The other strand is the lagging strand, and it is replicated discontinuously in short sections. These sections are called Okazaki fragments, and they are short lengths of DNA.
The leading strand in DNA replication is synthesized continuously in one direction, while the lagging strand is synthesized in segments due to their antiparallel structure, creating Okazaki fragments.
Explanation:The leading strand and the lagging strand are two terms used to describe the way in which DNA replication occurs. DNA replication is a process that is integral to the biological function of living organisms.
The leading strand is synthesized continuously in the 5' to 3' direction. DNA contains two strands which are antiparallel - meaning they run in opposite directions. Due to the nature of the DNA polymerase enzyme which can only add nucleotides in the 5' to 3' direction, one strand - the leading one, can be replicated continuously in the same direction as the replication fork advances.
The lagging strand, however, is replicated in segments known as Okazaki fragments due to the antiparallel directionality of the DNA strands. The creation of these short, separate Okazaki fragments is then later joined together to make the complete strand.
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Which of the following theories is supported by the discovery of magnetized rocks that do not match with Earth's poles?
HELP PLS!!!!!!!!!
Answers
You haven't included answer choices, so my answer may not match up with the answers you have to choose from. However, this has to do with the polar reversal theory, which was developed after the discovery of magnetic striations at the bottom of the Marianas Trench. According to this theory, Earth's magnetic poles reverse every 200,000-350,000 years due to the constant recycling of Earth's crust through subduction of tectonic plates.
Answer:
A
Explanation:
hope this helps