Answer:
1,2 × 10⁹ : 1
Explanation:
In fact, the average male will produce roughly 525 billion sperm cells over a lifetime and shed at least one billion of them per month. A healthy adult male can release between 40 million and 1.2 billion sperm cells in a single ejaculation.
Explanation:
Therefore, a standard sperm to egg ratio of 1 × 105 sperm per egg is recommended for fertilization in Atlantic cod. At the 1 × 103:1, 5 × 103:1, and 1 × 104:1 sperm to egg ratios maximum fertilization occurred after 30 min sperm to egg contact time.
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cell engulfs microorganisms in cell "eating":
pinocytosis
active transport
phagocytosis
passive diffusion
facilitated diffusion
A and B are biotic in nature, C, D, and E are abiotic in nature. In an open system, A produces D and E while B could not produce anything rather depend totally on the D and E produced by A. As the number of A increases, it favours the growth of B, the production of D and E also enhances the growth and development of B.
Answer:
A: Plants
B: Consumers
C: Sun
D: Oxygen
E: food
Explanation:
Abiotic factors refer to non-living things int he ecosystem, whereas the biotic factors are the living things in the environment.
A, in this case, is referring to the plants in the ecosystem, the producers. Plants produce D and E, that is, oxygen and food respectively. B are the consumers in the environment, the herbivores in particular that feed on the plants and rely on it as the only food source. C refers to the sun as the source of light energy for the plants.
Which statement describes one or both formations?
Formation 2 is an extrusion.
Formation 1 is an intrusion.
Formations 1 and 2 are faults.
Formations 1 and 2 are igneous rock.
Answer:
Formations 1 and 2 are igneous rock.
Explanation:
Trust me
Answer:
formations 1 and 2 are igneous Rock. hope this helps:)
Explanation:
Assume Deb eats three 150-gram bags of potato chips each day. Use the USDA food database to calculate Deb’s calorie consumption and the number of grams of protein, carbohydrates (by difference), and the total fat that she eats. You may use any brand of potato chips in the database, but state the brand in your answer.
Answer:
Let’s consider that she eats Herr’s Baked Ripple Cut Potato Chips. If she ate a total of 450 grams of these potato chips every day, she will consume about 1,930 calories, 32.13 grams of total fat, 32.13 grams of protein, and 353.36 grams of carbohydrates.
Explanation:
within which structure does the placenta normally develop ?
Answer:
Uterus
Explanation:
Answer:
Uterus
Explanation:
The female reproductive system mainly takes place here
A diet rich in sodium and vitamins helps to maintain good bone growth and
development
O True
O False
Question 16 of 25
2 Points
A toad that escapes into an ecosystem with other toads that it outcompetes
is an example of a(n)
O A. keystone species
O B. extinct species
O c. invasive species
O D. introduced species
Answer:
C
Explanation:
Invasive species are usually species that enter an environment and cause destruction to the food chain, biodiversity, and the overall way of life. The toad outcompeteing the frogs that are supposed to be in the environment suggest it's an invasive species.
An introduced species would be if the toad was purposely introduced to the environment, which it was not.
Muscles are connected to bones by:
a)cartilage
b)ligaments
c)membranes
d)tendons
law of consevation of matter
Environmental pollution does not affect an individual’s health. Please select the best answer from the choices provided T
Answer:
False,
environmental pollution of food, water sources, air, etc can all affect individual's health it's kinda obvious that environmental pollution does affect a person health
Explanation:
hope it helps!
Environmental pollution does not affect an individual’s health, which is a false statement, as the environment has an important role in the health of the person, such as the cold environment activating different genes in people than the hot environment.
What is the significance of environmental pollution?Environmental pollution has many implications, such as the following, air and water pollution, depletion of natural resources as their number decreases due to unfavorable conditions, increased risk of diseases, decreased biodiversity, etc.
Hence, environmental pollution does not affect an individual’s health, which is a false statement, as the environment has an important role in the health of the person, such as the cold environment activating different genes in people than the hot environment.
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do honey bee produce propolis?
Answer:
Propolis or bee glue is a resinous mixture that honey bees produce by mixing saliva and beeswax with exudate gathered from tree buds, sap flows, or other botanical sources. It is used as a sealant for unwanted open spaces in the hive.
Explanation:
A recent encyclopedia entry about dogs cites multiple research papers done by scientists at veterinary schools. According to the article, Labrador retrievers come in two specific breeds: English and American. The English breed is described as stocky and heavy, while the American breed is described as tall and lanky. The article describes current scientific research as showing that males of both breeds usually weigh about 29-41 kg (65-90 lb), and females weigh 25-32 kg (55-70 lb). Coat colors for both breeds come in solid black, yellow, or chocolate. All labs have strong tails and webbed feet, which help them swim. Devon would like to use this information to determine if his new dog is an English or American Labrador retriever.
Which best describes the reliability of the information?
It is not reliable because only scientists can use scientific information for reference.
It is not reliable because it doesn’t talk about how to test and only gives data about the breeds.
It is reliable because the article is based on multiple studies done by scientists at multiple veterinary schools.
It is reliable because it gives information about both types of Labradors in addition to information about other types of dogs.
Answer:
It is reliable because the article is based on multiple studies done by scientists at multiple veterinary schools.
Explanation:
The information in the article can be described as reliable due to the fact that it is based on multiple studies by scientists.
When a study is carried out by different group of independent researchers and a similar result if obtained, the results becomes more or less a theory. A research that is reproducible and gives similar result can totally be relied on for information.
Fill in the blanks with the correct word or phrase.
The process of change in a population over time is called
.
The process by which organisms that are better adapted to the environment survive and reproduce is called
.
Answer:
evolution
Natural selection
Explanation:
Answer:
The first blank is evolution and the second black is natural selection.
Explanation:
Is the greenhouse effect good or bad
Cutting down only some trees ina a forest, leaving a mix of tree sizes and species standing, is called
A. Selective cutting
B. Clear cutting
C. Certified cutting
D. Patch cutting
Which types of bacteria does the Monera Kingdom consist of ?
Answer:
Prokaryotic Bacteria
Answer:
Monera is a kingdom in biology that comprises prokaryotes, which are single-celled organism that have no true nucleus.Apr 28, 2017
Explanation:
Kingdom Monera
You have suffered from a lot of diseases that bacteria cause. But, do you think all bacteria are bad? No! The bacteria have a huge kingdom of their own that consists of a number of varieties of them. Each bacteria has a different role to play. They belong to the kingdom Monera. Here, we will know all about the kingdom Monera. We will look at both their characteristics and divisions in greater detail.
Characteristics of Monera
Monera (Monos – single) includes prokaryotes and shows the following characters:
They are typically unicellular organisms (but one group is mycelial). The genetic material in these organisms is the naked circular DNA. A nuclear envelope is absent. Both, ribosomes and simple chromatophores, are the only subcellular organelles in the cytoplasm.
Sap vacuoles do not occur. Instead, gas vacuole may be present.
The predominant mode of nutrition is absorptive but some groups are photosynthetic (holophytic) and chemosynthetic.
The organisms are non-motile or move by the beating of simple flagella or by gliding.
Bacteria Shape
Cocci: They are oval or spherical in shape.
Bacilli: They are rod-shaped. They may or may not have flagella.
Vibrios: These are small and ‘comma or kidney’ like. They have a flagellum at one end and are also motile. Vibrio bacteria has a curve in its cell.
Spirillum: They are spiral or coiled like a corkscrew. The spiral forms are usually rigid and bear two or more flagella at one or both the ends e.g., Spirillum, Spirochaetes etc.
Filament: Just like fungal mycelia, the body of the bacterium is filamentous. The filaments are very minute in size. Examples include Beggiota, Thiothrix etc.
Stalked: The body of bacterium possesses a stalk e.g., Caulobacter.
Budded: The body of the bacterium is swollen at places e.g., Rhodomicrobiu
Structure of Bacteria
Capsule: In a large number of bacteria, a slimy capsule is present outside the cell wall. It is composed of polysaccharides and the nitrogenous substances (amino acids) are also present in addition. This slime layer becomes thick, called, capsule. The bacteria, which form a capsule, are’ called capsulated or virulent bacteria. The capsule ‘is usually found in parasitic forms e.g., Bacillus, anthracite, Diplococcus pneumoniae, Mycobacterium tuberculosis.
Cell wall: All bacterial cells .are covered by a strong, rigid cell wall. Therefore, we classify them under plants. Inner to the capsule, the cell wall is present. It is made up of polysaccharides, proteins and lipids. We also find D-glutamic acid and diaminopimelic acid.
Monera
Plasma membrane: Each bacterial cell has a plasma membrane. It is situated just internal to the cell wall. It is a thin, elastic and also differentially or selectively permeable membrane.
Cytoplasm: The cytoplasm refers to a complex and aqueous fluid or semifluid ground substance (matrix). This material consists of vitamins, salts, enzymes, carbohydrates, soluble proteins, co-enzymes, lipids, mineral and nucleic acids. The organic matter is present in the colloidal state.The cytoplasm is granular due to the presence of a large number of ribosomes.
Nucleoid: It has other common names like genophore, naked nucleus or incipient nucleus. There is nuclear material in these, DNA. It is double helical as well as circular. Some kind of typical protein surrounds it. However, these are not histone proteins.
Plasmids: In addition to the normal DNA chromosomes, many bacteria (e.g., E.coli) have extrachromosomal genetic elements or DNA. These elements are plasmids. They are small circular double-stranded molecules.
Flagella: These are fine, thread-like, protoplasmic appendages. These extend through the cell wall and the slime layer of the flagellated bacterial cells. These help in bacteria to swim about in the liquid medium.
Pili or Fimbriae: Besides flagella, some tiny or small hair-like outgrowths are present on the bacterial cell surface. These are pili. They comprise of pilin protein. They consequently measure about 0.5-2 mm in length and 3-5mm in diameter.
Nutrition in Bacteria
On the basis of mode of nutrition, we can group bacteria into two broad categories. First is autotrophic whereas second is heterotrophic bacteria.
Autotrophic bacteria: These bacteria are able to synthesize their own food from inorganic substances, as green plants do. They derive their carbon from carbon dioxide. The hydrogen needed to reduce carbon to organic form comes from sources such as atmospheric H2, H2S or NH3.
Heterotrophic bacteria: Most of the bacteria cannot synthesize their own organic food. They consequently depend on external organic materials. They require at least one organic compound as a source of carbon for their growth and energy. Such bacteria are heterotrophic bacteria. Heterotrophic bacteria are of three types: Parasites, Saprotrophs and Symbionts.
(1) What will be the frequency of the recessive allele in a population of 100 kangaroos if there are 50 dominant alleles?
a. 150
b. 0.75
c. 0.50
d. 0.25
(2) If the frequency of the recessive allele for a gene is 0.3, calculate the expected frequency of heterozygotes in the next generation if the population is in Hardy-Weinberg equilibrium.
a. 0.42
b. 0.21
c. 0.70
d. 0.30
Answer:
1. Option c
2. Option a
Explanation:
1. If there are 50 dominant alleles, this represent the frequency of dominant alleles p = 50/100 = 0.5
Using the formula p+q = 1 we can solve for the frequency of the recessive alleles q = 1 -0.5 = 0.5 = 50%.
2. the frequency of the recessive allele for a gene is 0.3 which is q = 0.3
From the Formula p + q = 1 we can solve for p the frequency of the dominant alleles = 1 - 0.3 = 0.7
To calculate for the number of heterozygotes, we use 2pq = 2 x 0.7 x 0.3 = 0.42
What happens to the energy in detritus?
Answer:
detritus, in ecology, matter composed of leaves and other plant parts, animal remains, waste products, and other organic debris that falls onto the soil or into bodies of water from surrounding terrestrial communities. microorganisms (such as bacteria or fungi) break down detritus, and this microorganism-rich material is eaten by invertebrates, which are in turn eaten by vertebrates. many freshwater streams have detritus rather than living plants as their energy base.
Explanation:
The outbreak in spread epidemic diseases such as swine flu are tracked by? A epidemiologist or a sonographer
Answer:
An epidemiologist
Answer:
A g I need the same answer homie
Explanation:
Felipe believes that whenever the Moon is in the position that is shown from above (top view) in Diagram A, the Moon always looks completely bright in the view from Earth, as shown in Diagram B. Is Felipe correct? If he is correct, explain why the Moon always looks bright from Earth in that position, and explain how he should show light on the Moon in Diagram A. If he is incorrect, explain how else the Moon can look when it is in that position.
Answer: Felipe is wrong.
Explanation:
In diagram A, we can see that the light comes from the left, it first impacts on the Earth, and then we have the Moon.
Now, you can model this situation with a flashlight (the Sun) a basketball (the Earth) and a tennis ball (the Moon)
When you point with the flashlight at the basketball, the basketball will look bright, but it will cast a shadow behind it. This shadow will cover the tennis ball, and almost no light will reach the tennis ball, so it will not look bright.
This phenomenon is called a lunar eclipse, and this happens when the Earth is in between the Sun and the Moon. When this happens, we see the moon a bit darker and more reddish.
Felipe is incorrect, as it will not be possible to see the moon if it is in the position shown in the diagram.
We can come to this answer because:
It is only possible to see the moon when it is reflecting sunlight.In this case, no other type of celestial body must be in front of the moon, blocking the sunlight.As we can see in the question above, sunlight is being emitted from left to right.Although the moon is in the right direction to reflect this light, the earth is in front of the moon.Therefore, sunlight will not shine on the moon, because the earth will block it and cast a shadow over the moon.Therefore, it will not be possible to see the moon, as Felipe said.
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Which of the following is an organic molecule? A. Nitrous oxide B. Water C. Glucose D. Hydrogen gas
Answer:
C.
Explanation:
A. N2O
B. H2O
C. C6H12O6 contains carbon.
D. H2
Answer:
C Č Ç Ć
Explanation:
Which of these is one way that seismologists compare earthquakes?
A. By counting the number of tsunamis
B. By measuring their pyroclastic flow
C.By assigning them a magnitude between 1 and 10
D. By measuring their elastic rebound
PLEASE HELP ME!!
Answer:
by counting the number of tsunami
Explanation:
what i think is that the tsunami earth quakes are particularly destractive and dangerous because the massive tsunami waves and there way was to determine that an event is a tsunami earth quakes in time to warn people that there was an expectedly large waves.
Seismologists are professionals in geology that compare earthquakes by measuring their elastic rebound (option D).
What is an elastic rebound?The elastic-rebound can be defined as the amount of energy (or energy transfer) that can be generated by earthquakes.
Seismologists are professionals in geology that compare earthquakes by using this type of measurement.In conclusion, seismologists are professionals in geology that compare earthquakes by measuring their elastic rebound (option D).
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You are in a laboratory attempting to identify a genetic defect responsible for a disease. You believe you have located the gene that results in a faulty protein—but you aren't sure! How could you be sure you have located a section of DNA that encodes for a protein?
Answer:
Allow the DNA to be transcribed to RNA and see what protein results.
Explanation:
Which type of nonvascular plant grows in new or disturbed environments?
A. mosses
B. ferns
C. hornworts
Answer:
A.mosses
Option A is the right answer
ATP contains a large amount of energy because _____.
Answer:
ATP contains a large amount of energy because it has high-energy phosphate bonds.
Explanation:
glad could help pls mark brainless!
Enzyme activity within metabolic pathways is regulated by
O food consumption
O activators and inhibitors
O oxidation
O neurons
Answer:
activators and inhibitors
Explanation:
Why do you think the pace of the development of society is not equal everywhere?
Write in four points.
The correct answer to this open question is the following.
These are the four points that explain the reason why the pace of the development of society is not equal everywhere.
1.- Education. Formal education is of the utmost importance in societies that are considered developed or part of the first world. On the other hand, lack of education is a major reason why people stay ignorant and progress is minimum. Governments must invest in a good public education system with opportunities for all.
2.- Infrastructure. If the country cannot cover the necessities of its citizens, it would be more difficult to develop the kind of infrastructure that allows growth for the nation. This means poor means of communication, poor road conditions, lack of trade systems, poor health services, and limited resources to create jobs in industries.
3.- Culture. People's idiosyncrasy has a lot to do with the way they think and behave. This directly impacts the way people see life, personal progress, ambitions, and aspirations.
4.- Location. Often, geographical location limits the progress and development of a country. For instance, Middle East countries have a problem accessing water resources. Or countries that have geographical features such as mountain ranges or deserts that limit communication and trade with other countries.
The pace of development of society is not the same everywhere, because geography, economy, natural resources and technological development are not the same, these being important points for the development of a society.
What is Social Development?Social development is an important factor found in society, capable of changing its social and economic course, so that the increase in social development means an increase in human capital and in social capital itself, moreover, it means more than a quantitative issue. , but also something qualitative.
With this information, we can conclude that pace of development of society is not the same everywhere, because geography, economy, natural resources and technological development are not the same, these being important points for the development of a society.
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Why KOH solution is kept in the test tube inside the air tight conical flask while doing the experiment of respiration of seeds?
Answer:
It is kept inside to absorb the CO2 released by the germinating seeds.
Explanation:
It means it will create a cycle for the flask. So, an equal volume of water rises up in the tube.
Hope it helps.
- Cells control gene expression at which steps?
transcription, translation, and the formation of the final protein
interphase, prophase, and metaphase
mitosis, meiosis, and the formation of the final protein
transcription, mitosis, and DNA replication
Answer:
A.
Explanation:
The cells control gene expression at transcription, translation, and the formation of the final protein.
What do you mean by gene expression?Gene expression is the process by which information from a gene is used in the synthesis of a functional gene product that enables it to produce end products, protein or non-coding RNA, and ultimately affect a phenotype, as the final effect.
Gene expression is the process by which the information encoded in a gene is turned into a function. This mostly occurs via the transcription of RNA molecules that code for proteins or non-coding RNA molecules that serve other functions.
Gene expression is a tightly regulated process that allows a cell to respond to its changing environment. It acts as both an on/off switch to control when proteins are made and also a volume control that increases or decreases the amount of proteins made.
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True or False. Natural disaster disturb most populations within a community and break interactions between organisms
