In molecular compounds molecules bonded tk gether by____
a) covalent bond
b)metallic bond
c)ionic bond
d)none of them
Answer:
a) Covalent bond
Explanation:
Atoms of different element are held together in molecules by covalent bonds in which atoms share their valence electrons with each other.
Which of the following occurs when a small group of individuals leaves a population
and establishes a new one in a geographically isolated region?
A. Genetic drift
B. Natural selection
C. Non-random mating
D. Gene flow
answer is A
Explanation:
A. Genetic drift
When Gregor Mendel crossed true-breeding tall plants (TT) with true-breeding short plants (tt), all the offspring were tall because
Answer:
Because the trait associated with "tall-ness" is dominant and shortness is recessive
Answer:
the allele for tall plants is recessive and none of the offspring received an allele for short height.
Explanation:
Thats what my teacher said^
How will increased temperatures affect water in California?
Answer:
Rising temperatures also increase the rate at which plants transpire water into the air to keep cool, so irrigated farmland would need more water.
Explanation:
1. In the fast change, how are other parts of the ecosystern affected?
Answer:
is there more to this question because this doesn't make sense.
Explanation:
Name the major muscles
Which of the following best describes a mutation?
a change in a gene
a section of a chromosome that codes for a trait
anything that can damage a gene
a distinguishing quality that can be passed from one generation to another
Adaptations that result from natural selection are expected to increase
the fitness of an organism. In terms of natural selection, which of the
following best describes fitness?
A Being able to escape from predators
B Being among the strongest organisms in a population
C Being able to survive, find a mate, and produce offspring
D Being able to survive long enough to reach the adult stage
Answer:C Being able to survive, find a mate, and produce offspring
The fitness that should be explained when being able to survive, also find the mate and it generated the offspring. Hence. option c is correct.
What is fitness?It is considered as the health and its well-being. It is the capability for performing that should be based on sports, occupations, and day to day activities.
It is generally accomplished via proper nutrition, physical exercise, proper sleep.
Therefore we can conclude that the option c is correct.
And, the rest of the options are considered to be wrong.
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mitosis and cell cycle definition
Answer:
mitosis definition: a type of cell division that results in two daughter cells each having the same number and kind of chromosomes as the parent nucleus, typical of ordinary tissue growth.
cell cycle definition: A cell cycle is a series of events that takes place in a cell as it grows and divides. A cell spends most of its time in what is called interphase, and during this time it grows, replicates its chromosomes, and prepares for cell division.
HELP MEEE,!!!!! PLEASE
Answer:
C
Explanation:
spindle fibers are important during metaphase. division stops without them.
What figurative term is "merry hell"?
onomatopoeia
personification
oxymoron
hyperbole
Help!! When a virus gets into the body, some body cells
are................
IS IT WEATHERING, EROSION, OR DEPOSITION?
Over time, the running water wears down rocks, making them smooth.
Answer:
Weathering
Explanation:
The answer is weathering because, weathering is the breaking or wearing down of rocks, soil, minerals, and wood. The water wore down the rock, making it smooth, so it connects to the definition that i just gave you.
Hope it helped!
HELP HELP HELP
THERES ONLY 1 RIGHT ANSWER
Directional selection drift
Disruptive/divergent selection drift
Fitness
DNA
Artificial selection
Vestigial structure
Homologous structure
Convergent evolution
Niche
Strong big one
Thin needle nose
Behavioral selection
Genetic variation
Answer: dna
Explanation:
the evolutionary mechanism that maintains or increases diversity is?
Answer:mutation
Explanation:
How does gene flow directly contribute to evolution?
Answer:
Evolution can also occur as a result of genes being transferred from one population to another. This gene flow occurs when there is migration. The loss or addition of people can easily change gene pool frequencies even if there are no other evolutionary mechanisms operating.
Explanation:
hope this helps!!!
why aren't scientific theories just called facts?
Answer:
Explanation:
Is this a question or a joke?
Which is NOT true of magnetic
domains?
A. Magnetic domains are groups of aligned
atoms.
B. Magnetic domains are too small to be seen.
C. Magnetic domains are outside of a magnet.
The study of magnetic domains is defined as the micro magnetics. The Magnetic domains are outside of a magnet is not true. The correct option is C.
What is a magnetic domain?A magnetic domain is defined as a region within a magnetic material in which the magnetization is in a uniform direction. This indicate that the individual magnetic moments of the atoms are aligned with one another and they point in the same direction.
The magnetic domain structure is responsible for the magnetic behavior of ferromagnetic materials like iron, nickel, etc. The domains are found to be oriented randomly if there is no external magnetic field.
Thus the correct option is C.
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Read the passage. Then explain the ways humans have influenced the traits in corn plants and the impacts each biotechnology has had.
Passage
Many of the types of corn found in grocery stores were originally bred for their taste and productivity. But these varieties are often threatened by pests. This makes it harder for farmers to produce enough corn.
Scientists have used genetic engineering to make GMO corn plants that are resistant to pests. In one type of GMO plant, they added genes from bacteria that live in soil. The genes let the GMO plants produce a bacterial protein that kills certain insects.
Answer:
It decreases cost of production on the crop as well as increase production.
Explanation:
It is a very efficient method to save a corn plant from the attack of bacteria. This method is used in almost each and every plant in order to make it resistance against harmful pests and microorganism. By using this technology, the cost of production on the growing of crop decreases which gives more profit to the farmers as well increase the overall productivity of that corn crop.
Answer:
One of the ways we have influenced the traits in corn is through selective breeding. We now have taller plants, and bigger ears of corn, that taste better. Another way we have influenced the traits is by modifying them to be pest resistant.
Hope this helps! ✌️____ currents inside Earth might drive plate motion.
a.
Vertical
c.
Horizontal
b.
Convection
d.
none of the above
Please select the best answer from the choices provided
Answer:
B. Convection
Explanation:
What is the role of the fungus in the food web shown?
boa constrictor
beetle
coati
poison dart frog
sloth
strangler fig
fungus fruit bat
O A. To break down organic matter into carbon dioxide and water
B. To break down food molecules in the absence of oxygen
C. To convert light energy into chemical energy organisms can use
D. To gather green light in order to carry out photosynthesis
The role of fungus in the food web shown is to break down organic matter into carbon dioxide and water. The correct option is A.
What is fungus?Fungus is a eukaryotic organism. They grew in soils and wood and moist and dark places. Fungi break down the material. While consuming the nutrients in the decaying matter, they produce enzymes that break down the material.
The biomass would be overrun with the dead matter without the majority of fungi, which is why they are helpful. Bacteria and actinomycetes are some additional decomposers. They act as nature's recycling machine by consuming animal carcasses, bones, dead plants, and various minerals thanks to their enzymes.
Therefore, the correct option is A. To break down organic matter into carbon dioxide and water.
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How would Earth be different without the greenhouse effect?
A. There would be more solar energy reaching Earth.
B. There would be more ice on Earth's surface.
C. The oceans would contain more carbonic acid.
D. The atmosphere would contain more methane.
PLS HELP I NEED THIS BY TODAY ASAP
WILL GIVE BRAINLIEST
which of the following situations best displays a direct effect of a flood?
a.) a change in building regulations
b.) the destruction of a neighborhood
c.) the creation of new levees for future protection
d.) trough of wave arrives fast exposing the sea floor
Answer:
b.
Explanation:
Match the causes with their effects.
Cause: Convection currents cycle through magma.
Cause: Unstable isotopes inside Earth release energy.
Cause: Iron in Earth’s outer core swirls due to convection currents.
Effect: Radiogenic heat is released.
arrowRight
Effect: Earth has a powerful magnetic field.
arrowRight
Effect: Tectonic plates move.
arrowRight
1. Effect: Radiogenic heat released- Cause: convection currents cycle through magma.
2. Effect: Earth has a powerful magnetic field- Cause: Iron in earths outer core swirls due to convection currents.
3. Effect: Tectonic plates move- Cause: unstable isotopes in earth release energy.
What is Convection current?Convection currents are defined as the result of differential heating where lighter, less dense, warmer materials rise while heavier, more dense, cooler materials sink. This is the movement that creates circulation patterns known as convection currents in the atmosphere, in water, and in the Earth's mantle.
Convection currents arise from differences in fluid density that arise due to a temperature gradient, resulting from the continuous replacement of the hot fluid in the region of the heat source with the nearby cold fluid which is known as the natural convection currents.
Thus, Radiogenic heat released- Cause: convection currents cycle through magma.
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Answer:
Effect:
Radiogenic heat is released
Cause:
Unstable isotopes inside Earth release energy
----------
Effect:
Earth has a powerful magnetic field
Cause:
Iron in Earths outer core swirls due to convection currents
----------
Effect:
Tectonic plates move.
Cause:
Convection currents cycle through magma.
-----------
Explanation:
Got it right on Edmentum.
Please help with all three will mark brainliest
Answer:
cells and tissue are the most basic level
then it is the bladder as it is connected to the kidney
and then the muscular system as it is chewing
Explanation:
What would happen to food chains if all the plants died out ?justify your answer.
Answer: there would be no way for energy to enter the food web, and the ecological community would collapse.
Explanation:
everything would die because its a domino effect
Answer:
There would be no way for animals to get the energy they would need so all of the animals would get sick, and if other animals ate them they would get sick and the food chain would start dying.
Explanation:
Humans burn fossil fuels and wood, releasing carbon dioxide into the atmosphere. This carbon dioxide is then absorbed by trees for photosynthesis. These processes are contributory to which chemical cycle?
Carbon cycle controls the amount of carbon dioxide in the atmosphere. These processes are contributory to the carbon cycle in the environment.
What is a carbon cycle ?
The carbon cycle is nature's method of recycling carbon atoms, which repeatedly go from the atmosphere into Earth's living things and back into it. The majority of carbon is preserved in rocks and sediments; the remainder is preserved in the ocean, the atmosphere, and living things.
Life on Earth is reliant on the carbon cycle. The quantity of carbon that is naturally released from reservoirs is equal to the amount that is naturally absorbed by reservoirs because nature tends to maintain carbon levels in balance. This carbon balance must be preserved for the earth to continue to support life.
Therefore, the carbon cycle is an important chemical cycle.
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How much force would a shot putter need to make a 5.5 kg shot accelerate at 8 meters per so one squared
Answer:
44 N
Explanation:
Force applied can be calculated using the formula as follows;
F = m.a
Where;
F = force (Newton)
m = mass (kg)
a = acceleration (m/s²)
According to the information provided in this question, mass of shot put = 5.5kg, acceleration = 8m/s². Hence;
F = m × a
F = 5.5 × 8
F = 44 Newtons
The force needed by the shot putter is 44N.
Select all the correct answers.
The image shows a week-old chick embryo. What can you conclude about its current stage of development?
A spinal column is present.
The chick will develop four limbs and a beak.
It's an invertebrate.
It's sexually mature.
It's about to undergo a metamorphosis,
Answer:
spinal column is present.
B] The chick will develop four limbs and a beak.
C] It's an invertebrate.
D] It's sexually mature
E] It's about to undergo a metamorphosis.