To obtain the atomic weight in an atom, add the:
To calculate the atomic mass of a single atom of an element, add up the mass of protons and neutrons. Example: Find the atomic mass of an isotope of carbon that has 7 neutrons
Question 3 of 34
Which of the following explains how polar molecules form?
O A. The two atoms in a bond share electrons equally.
B. One atom transfers its electrons to another atom.
O C. Electrons are more attracted to one of the atoms involved in a
bond.
O D. Protons are more attracted to one of the atoms involved in a bond.
Sita wants to grow sugarcane in the garden. She planted leaf ,stem and root of sugarcane,which of these will give rise to a new plant.
Answer:
The correct answer is - stem.
Explanation:
Sugarcane plants are grown from the cuttings of the sugarcane and planted in soil horizontally. There are rings present at each stem form by the falling of the old leaves. Roots come from the stems planted horizontally from small nodes present on stems.
Sit needs to cut the sugarcane stems and planted them in the soil horizontally to grow the sugarcane plant but it needs to be remembered that sugarcane plants required sunlight to grow.
Which is not a component or stage of photosynthesis?
Which is not a component or stage of photosynthesis?
The light reactions
The Calvin cycle
An electron transport chain
The Krebs cycle
Answer:
I believe the answer is C, its been a while since I've learned this
you are farmer whose main crop is corn for you have notice that there is a decline in the quantity of corn produced this is due to the numerous insect and pets that inhabiting the corn farm in the last few years you decided to seek advice in agricultural office in your municipality on now to get the rate of this pests assuming that you were given advice by subject matters expert working in agricultural office enumerate the steps that you're going to do? applying the application of recombinant DNA
Answer:
.
Explanation:
.....................
Which things need to be present for natural selection to take place? (select all that apply)
A.Variation in the population.
B.The ability for asexual reproduction.
C. Competition between organisms.
D. Large amounts of resources.
Answer:
A & C
Explanation:
Four conditions are needed for natural selection to occur: reproduction, heredity, variation in fitness or organisms, variation in individual characters among members of the population. If they are met, natural selection automatically results.
YES - A) You must have variation in the population, typically in the terms of "fitness" or having admirable/sucessful traits that make them more likely to reproduce and ensure their own offspring are fit too.
NO - B) It is sexual (not asexual) reproduction that uses natural selection for their offspring. Although some asexual organisms use natural selection, it is ALWAYS used if possible with natural selection to ensure the fitness of characteristics is passed down.
YES - C) Competition is necessary for natural selection to occur. When those who are more physically fit compete, they are more likely to live against their opponent and therefore pass on the trait of fitness.
NO - D) Although resources are necessary, large amounts are not as it does not lead to fighting over them (scarcity) bringing us back to the need for competition above.
Hope this helped!
How is energy "lost" by organisms?
A.heat
B.cellular respiration
C. egested waste
D.biomass
Answer:
The think your answer is option B
Answer:
Heat energy lost by organism.
Explanation:
I think no A is the answer
based on this information, scientist could predict that the base _____ pairs with ______ and the base
_____ pairs with ______ in the formation of the DNA molecule
Based on this information, scientist could predict that the base [tex]\boxed{ adenine }[/tex] pairs with [tex]\boxed{ thymine }[/tex] and the base [tex]\boxed{ cytosine }[/tex] pairs with [tex]\boxed{ guanine }[/tex] in the formation of the DNA molecule.
[tex]\circ \: \: { \underline{ \boxed{ \sf{ \color{green}{Happy\:learning.}}}}}∘[/tex]
Is the chief justice of the supreme court the commander in chief of the military
No , The Chief Justice of the Supreme Court is not the Commander in Chief of the Military .
Which is one reason for the formation of global winds? (1 point)
-uneven heating of Earth's surface
-fewer daylight hours in Arctic regions
-loss of energy as warm air rises
-condensing of moisture in cooling air
One reason for the formation of global winds is the uneven heating of the Earth's surface.
The uneven heating of the Earth's surface is primarily caused by variations in solar radiation received at different latitudes.
The equator receives more direct sunlight when the sun's rays strike the Earth's surface, they heat the air in contact with it. n the poles, resulting in a temperature gradient across the planet. This temperature gradient drives the formation of global winds.
Fewer daylight hours in Arctic regions: This option is incorrect. The number of daylight hours in a region does not directly contribute to the formation of global winds. While sunlight does play a role in heating the Earth's surface and driving atmospheric circulation, the length of daylight hours is not a determining factor.
Loss of energy as warm air rises: This option is valid. As warm air rises due to heating from the Earth's surface, it expands and cools. This cooling causes the air to lose energy, and as a result, it becomes denser and sinks back toward the surface. This sinking motion creates regions of high pressure, which contribute to the formation of global winds.
Condensing of moisture in cooling air: This option is incorrect. The condensation of moisture in cooling air relates to the formation of clouds and precipitation, but it does not directly influence the formation of global winds.
Therefore, the uneven heating of the Earth's surface, due to variations in solar radiation, is a significant reason for the formation of global winds.
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Answer: A) uneven heating of Earth's surface
Hope it helps ^_^
An organism is born with a genetic variation not present in any of its ancestors. This variation is most likely the result of
A.circulation of blood
B.competition among individuals
C.respiration
D.a mutation in its DNA
Answer:
D
Explanation:
This is because circulation is blood,respiration and competition have no relation to changing the DNA of an organism
which best explains a system
A structure that carries out a specific function
B group of organs that carry out different function
Croup of organs that work together to carry out a specific function
D way that organism operate
Answer:
C
Explanation:
Group of organs that work together to carry out a specific function - > Organ system
what branch of biology deals with the study of herdity amd variation
Answer:
Genetics.
Explanation:
Genetics is a branch of biology concerned with the study of genes, genetic variation, and heredity in organisms.
Is there difference between dorsal and posterior ?
Answer:
No not at all
Explanation
Answer:
No, they both mean the same thing.
Explanation:
Posterior (or dorsal ) Describes the back or direction toward the back of the body.
1. Calculate the volume occupied by 0.845 mol of nitrogen gas at a pressure of 1.37 atm and a temperature of 315 K *
Answer:
[tex]PV=nRT \\ 1.37 \times V = 0.845 \times 0.083 \times 315 \\ V = 16.125 \: {cm}^{3} [/tex]
Woolly mammoths are an extinct species of elephant that lived in very cold climates.
They had very small ears.
Compared with the large ears of modern elephants, small ears would have assisted in
survival of the mammoths by
A. Decreasing the core body temperature
B. Increasing the effects of heat conduction
C. Increasing the radiation of heat from the body
D. Decreasing the surface area through which heat is lost
Answer:
The answer is B: Increasing the radiation of heat conduction
Which of the following would be an accurate food chain that could be found in the
tropical community?
A) cougar --> turtle --> banana
B) insect --> frog --> ocelot --> parrot
C) fruit --> turtle --> cougar
D) vegetable --> insect --> mushroom
Answer: B
Explanation:
The animals that live in tropical areas are in option B. Cougars can not live in the tropics, they live in the cold biomes. In the tropics, there are many insects, and frogs eat them. Ocelots eat the frogs, and the ocelots are eaten by parrots. The rest of the options are valid food chains, but they would not function in the area of tropics. The answer to the question is option B.
Glycans are a virulence factor for which group of organisms?
A. fungi
B. viruses
C. bacteria
D. protozoa
E. helminths
Answer:
C.bacteriaExplanation:
because bacterial glycans are attractive pathogen-specific targets. Bacterial cells are coated with an impressive array of glycan structures that comprise their cell wall
Glycans are a virulence factor for bacteria. So, the correct option is C.
What are Glycans?
Glycans are also known as polysaccharides, are carbohydrate-based polymers made by all living organisms. They are basically chain-like structures that are composed of single sugar molecules (monosaccharides) linked together by chemical bonds.
Now, out of given organisms, only bacterial cell walls are mainly composed of polysaccharides. So, these glycans sites are target sites for disease-causing agents to perform their activity.
Therefore, glycans are a virulence factor for bacteria.
To understand more about Bacteria, refer to the link:
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Which of the following do animals gain from cellular respiration?
Carbon dioxide
O Sugar
O Energy
O Water
Answer:
carbon dioxide , Water
hope it help
Groundwater _____. forms when precipitation seeps into the soil exists above the earth's surface is impossible to pollute is not a usable water source for humans
Answer:forms when precipitation seeps into the soil
Explanation:
Answer:
It's B
Explanation:
I got it correct when I did it on my quiz on oddseyware.
Which is a reason why wetlands are important?
O They move water to higher ground during flooding.
O They filter pollutants out of water.
O They are estuaries.
O They provide minerals.
Answer:
They are estuaries
Explanation:
Sickle cell anaemia is an inherited autosomal recessive
condition caused by a mutation in the haemoglobin
subunit beta (HBB) gene. A male and female who are
phenotypically normal, discover through genetic testing
that they are both carriers of a HBB mutant allele. What is
the probability that their first child will be biologically
female and phenotypically normal?
Answer:
1/8 (12.5%)
Explanation:
An autosomal recessive disease is an inherited disease in which an individual need to receive both defective alleles at the same gene locus to be expressed in the phenotype. In this case, both parents are carriers of the recessive mutant allele associated with the sickle cell anaemia trait, thereby both parents are heterozygous, ie., each parent has one copy of the normal allele 'H' and one copy of the defective mutant allele 'h' associated with this condition. In consequence, their first child has a 1/4 (25%) chance of having sickle-cell anaemia. Moreover, the chance of having a girl is 1/2 and the chance of having a boy is 1/2, thereby the final chance of having a girl sickle cell anaemia individual is 1/4 x 1/2 = 1/8 (12.5%).
- Parental cross for sickle cell anaemia trait = Hh x Hh >>
- F1 = 1/4 HH (normal); 1/2 Hh (normal); 1/4 hh (sickle cell anaemia) >>
- Sex proportion of sickle cell anaemia individuals = 1/8 female sickle cell anaemia individuals + 1/8 male sickle cell anaemia individuals (1/8 + 1/8 = 1/4)
How did the mass extinction that killed the dinosaurs affect the evolution of mammals?
Answer:
With dinosaurs no longer eating them, mammals made quick evolutionary strides, assuming new forms and lifestyles and taking over ecological niches vacated by extinct competitors. ... Sixteen mammal species were discovered, with skulls and other bones fossilized after being buried in rivers and floodplains.
Explanation:
Cross two pea plants. Both are heterozygous for seed type; round (R) is dominant to wrinkled (r).
Answer: I hope the file helps you out :)
The cell membrane is described as being fluid because:
A. the phosphate groups move between fatty acids.
B. the membrane lets materials pass through it.
C. the fatty acid chains are inside it.
O D. the phospholipids move from side to side.
Answer:
D
Explanation:
The fluid mosaic model got its name because the plasma membrane resembles a mosaic formed by proteins embedded in a fluid of lipids. ... In the fluid mosaic model, the plasma membrane is basically composed of a lipid bilayer in which proteins are inserted.
Plants and animals are multicellular organisms made of organ systems that work together to maintain homeostasis. Body systems
are made of organs and organs are composed of tissue. Tissues are groups of cells that work together to perform functions.
Examine each of the examples below. Which of these are organs found in plants or animals? Select ALL that apply.
A
A
)
epithelial
B)
eye
leaf
D)
stem
vascular
The organs found in plants or animals is stem vascular. Therefore, option (D) is correct.
What are the features of the stem vascular?A stem is one of two main structural axes of a vascular plant, the other being the root. It supports leaves, flowers and fruits, transports water and dissolved substances between the roots and the shoots in the xylem and phloem, stores nutrients.
The vascular system of plants, complete with xylem and phloem, fills both purposes. Stems, along with roots, also store food for the plant. Pith, a tissue that lies in the center of the stem.
A vascular bundle is a part of the transport system in vascular plants. The transport itself happens in the stem, which exists in two forms: xylem and phloem.
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How do we know green light is not absorbed by chlorophyll?
Answer:
Green light is the wavelength of light that is reflected instead of absorbed by the chloroplasts.
Explanation:
hope this helps
Can someone answer this question for me
Answer:
The cell membrane
Explanation:
Answer:
The biologist is most likely studying plasma or cell membranes. As within these membranes, there are both a combination of lipids and proteins arranged in a fluid mosaic manner, in which the 2 main layers arranged are phospholipids.
Explanation:
What impact did Jefferson’s Louisiana Purchase have on the nation?
Which statement best describes the limits of science?
O A. Science can answer only mathematical questions.
B. Science cannot answer questions about the natural world.
C. Science can answer any question.
D. Science cannot answer questions about what people should do.
Answer:
A
Explanation:
science can answer only mathmatical questions
