Explain how sexual reproduction and the process of meiosis result in genetic variation.
Explanation:
sexual reproduction is the process of fusion of male gamete and female gamete producing a genetically different offspring .Meiosis is a process where a single cell divides twice to produce four cells containing half the original amount of genetic information. meiosis leads to variation by forming new combination of alleles from maternal and parental chromosome
(choose which answers suits the question )
Explanation:
Meiosis leads to the formation of gametes which have half the number of chromosomes in the somatic body cells. This means two gametes should fuse together for a new individual to form. The two gametes coming from two different parents carry features from two individuals, and this is the first source of variation.
The process of independent assortment happens during metaphase I where the chromosomes from both parents align on the equator of the cell in an independent way, meaning some from each parent on one side, and the opposite on the other. This means the gamete formed has a mixture of chromosomes from the parent's parents, and this is the second source of variation.
Finally there is the crossing over which happens also in metaphase I where genetic material between the homologous chromosomes is exchanged. This means not the whole parental chromosome goes to one cell, but rather a mixture of both the paternal and the maternal in this one chromosome go to one cell, and an opposite mixture goes to the other. And this is the third source of variation.
Present-day India is in South Asia, at the northern end of the Indian Ocean. What evidence found in India matches that of other locations?
Answer:
Pieces of evidence to support the hypothesis of continental drift. Mountain ranges near those continents' coasts seemed to line up, as though they had been made in the same place and at the same time!
Explanation:
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can someone please help
Answer:
A and c
Explanation:
A. Animalia
B. Eukarya
C. Vulpes
D. Vulpes vulpes
Answer:
D
Explanation:
Answer:
B or Eukarya
Explanation:
Order of classification:
Kingdom
Animalia
Phylum
Class
Order
Family
Species
Eukarya = The most specific that defines an organism
Hope this helps!
1. Who discovered cells?
2. What is the cell theory?
3. List 3 organelles found in the cell and their functions within the cell.
4. What is the purpose of the cell’s nucleus?
5. What are the 2 major differences between plant and animal cells?
6. What is homeostasis?
7. Give an example of how your body/cells maintain homeostasis.
8. What organelle is involved in cell division?
9. Give at least 3 characteristics of a Prokaryote and Eukaryote cell.
1. Robert Hooke
2. The, now universally accepted, theory that all living organisms are made up of cells, cells are the basic structural unit of all organisms, and that cells come from pre-existing cells
3. Nucleus - a dense organelle present in most eukaryotic cells, typically a single rounded structure bounded by a double membrane, containing the genetic material | Vacuole - a space or vesicle within the cytoplasm of a cell, enclosed by a membrane and typically containing fluid | Cytoplasm - the material or protoplasm within a living cell, excluding the nucleus
4. Cell compartmentalization, Replication, Gene expression, and Processing of pre-mRNA
5. Plant cells have large central vacuoles, while animal cells have smaller separate ones. Plant cells have a cell wall, while animal cells don't
6. Homeostasis is the tendency toward a relatively stable equilibrium between interdependent elements, especially as maintained by physiological processes. Basic terms: Homeostasis is the maintaining of balance within an organism
7. Shivering in the cold is an example. Your muscles tense up to try to keep your body warm
8. Centrioles
9. DNA, Cell, and Cytoplasm
What substance is needed to effectively treat 50% of an infected test population.
Answer:
Explanation:
population is critical to designing and implementing effective substance abuse treatment ... heterosexual transmission and 33 percent were infected through injection drug use. ... By some counts, the number of national and ethnic groups is nearly 50, ...
ከመጨነ ጰነከመ ነጰኸነ ነኸየጨጰነጰነ ጰነከነ ነከጰመ ነኸየ ሐጰጰሐ መከመ መጨጰመ መ
complete the sentence. The DNA strands are coiled around ________. This allows DNA to be packaged very efficiently.
a. proteins
b. other DNA molecules
c. chromosomes
d. nucleotides
Answer:
a. Proteins
Explanation:
Chromosomes are made up of DNA tightly coiled many times around proteins
Answer:
proteins I think I know its now D
Summarize the functions of blood below by providing a description:
Protection
Transportation
And temperature regulation
If anyone could help me with this I say thank you!
Explanation:
Blood has various functions that are central to survival. They include:
supplying oxygen to cells and tissuesproviding essential nutrients to cells, such as amino acids, fatty acids, and glucoseremoving waste materials, such as carbon dioxide, urea, and lactic acidprotecting the body from diseases, infections, and foreign bodies through the action of white blood cellsregulating body temperatureSum1 help? ill gove brainliest :D
Answer:
I don’t believe it’s A but I could be wrong I think it’s B.
Explanation:
Because weeds and grass will most likely grow faster than the plant itself.
I'll give brainliest to the person who gets it right with an explanation!
Which of the following is NOT a true statement about herbivores, carnivores, or decomposers?
Herbivores eat plants.
Omnivores eat other animals and dead organisms.
Decomposers break down dead organisms to release matter back into the environment.
Carnivores eat other animals.
Omnivores eat other animals and dead organisms is the wrong statement.
Omnivores are the animals which can eat both plants and animals.
Which geologic process most likely caused the formation of the Mount St. Helens Volcano?
A.converging boundaries
B.diverging boundaries
C.transform faults
D.rift zones
Answer: It's A.
Explanation: Mt. St. Helens is a volcano in Washington, near the Oregon border, in the Cascade Range. The Cascade Volcanoes, which stretch all from British Columbia through Northern California, are stratovolcanoes that have formed inland from a convergent plate boundary, where ocean crust is subducting below the continent.
The picture shows Poecilia reticulata, a type of guppy fish, found in a large variety of tropical environments. In some locations, populations of these fish have evolved over generations to become less vibrant in color and less spotted.
What is the most likely cause of this variation?
A
ecological succession, where individual guppy fish had less vibrant colors and formed a new population
B
artificial selection, where individual guppy fish were attracted to, and reproduced with less vibrant guppy fish
C
natural selection, where the less vibrant guppy fish avoided predators and passed on the genes to their offspring
D
reproductive isolation, where the population of less vibrant guppy fish only reproduced with individuals in one location
Answer:
C.
Explanation: It seems more typical to change your color because of predators that can easily see you if you really vibrant
PLZ PLZ PLZ PLZ HELP WILL BE MARKED BRAINLIEST
Answer:
summer
Explanation:
what is the purpose of DNA?
A. manufactures proteins
B. reduces activation energy
C. stores hereditary information
D. to aid in facilitated diffusion
Please help me, and only answer if you know the answer. Thanks! :)
Answer:
c ok your welcome my friend
Could someone help me on this please?
Answer:
this is easy
Explanation:
elk will increase in 1920 and in 1995 it will decrease
deer will increase in 1920 and in 1995 will decrease
deer mice will decrease in 1920 and decrease in 1995
vegetations will decrease in 1920 and decrease in 1995
hawks will increase in 1920 and increase in 1995
ez and will listening to music lol hope its right
How are ferns different from flowering plants? (Select all that apply.)
Flowering plants are seedless.
Ferns are the only vascular plants
Ferns reproduce by spores.
Ferns are seedless.
Flowering plants reproduce by spores.
Answer:
Seedless vascular plants are plants that contain vascular tissue, but do not produce flowers or seeds. In seedless vascular plants, such as ferns and horsetails, the plants reproduce using haploid, unicellular spores instead of seeds.
Explanation:
pa brainlies po plsssss
Please help w/ both asap I'll give brainliest
If an object has a constant positive acceleration, what can we assume about the forces on it?
A. Constant force applied in the same direction as the object's motion
B. Constant force applied in the opposite direction as the object's motion
C. Increasing force applied in the same direction as the object's motion
D. Increasing force applied in the opposite direction as the object's motion
If an object has a constant negative acceleration what can we assume about the forces on it?
A. Constant force applied in the same direction as the object's motion
B. Constant force applied in the opposite direction as the object's motion
C. Increasing force applied in the same direction as the object's motion
D. Increasing force applied in the opposite direction as the object's motion
Answer:
number 1 is- c
number 2 is b
Explanation:
PLZ ANSWER WILL BE MARKED BRAINLEST
Answer:
Iam not sure but I think it's position Y
Describe the dangers faced by prehistoric hominids.
Answer:
Our ancestors met astonishing challenges in their surroundings, and were susceptible to disease, injury, and predators. Environmental change – one of the ongoing challenges to survival – created both risks and opportunities in the lives of early humans.
Explanation:
HELP ASSAP!!
Based on the way living things are organized, what level combines to form organ systems?
A. Atoms
B. Cells
C. Organs
D. Tissues
Answer:
B. Cells
Explanation:
hope this helps
Choose one nonrenewable energy source and one renewable energy source. Describe how the use of each source affects the environment. Support your explanation with evidence.
help pls
PLSSSS HELPPPPPPPPPPPPPPPPPPPPPPPPPPPP
Answer:
A
Explanation:
Fertilizations occurs in the fallopian tube.
Point "a" is located where the fallopian tube is at
Hence, fertilization is most likely to occur at point A
Describe how the water molecules acted in the ice tray in the freezer
Answer:
Water is held together by hydrogen bonds, the strongest of inter-molecular forces. This is where a hydrogen atom in one molecule is strongly attracted to an electronegative atom (in this case, oxygen) in the other. When enough energy is absorbed by H2O, the molecules vibrate so vigorously that these bonds are loosened, giving them space to bounce around. This forms the liquid we all call and consider “water”.
Explanation:brainlest plz?
The molecules are moving because they have energy so as the liquid cools down, the amount of energy is reduced and the molecules start moving slower. When the temperature of water reaches about 0°C, the molecules stick together and form a solid – ice.
What is Solidification?When the ice cube tray which contains water in liquid state is placed in the freezer, it gets converted into solid ice cubes due to decrease in temperature and this process of changing liquid to solid state is called solidification.
It is a phase transition where a liquid turns into a solid when its temperature drops below the freezing point. This established definition of freezing means the solidification of a liquid or liquid material of a substance by a phase change which occurs due to cooling.
Thus, the molecules are moving because they have energy so as the liquid cools down, the amount of energy is reduced and the molecules start moving slower. When the temperature of water reaches about 0°C, the molecules stick together and form a solid – ice.
Learn more about Solidification, here:
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What causes the air to spin?
a. Cold/dry air sinks below the warm/wet air and it is pushed upwards
b. The land around the tornado
c. A cloud reaches down from the sky
d. Warm/wet air sinks below the cold/dry air and it is pushed upwards
Henry visits his aunt's house on Jacksonville Beach several times a year. He notices how much sand is between the ocean and the seawall in June. During July, there is a hurricane. In September, Henry notices that there is much less sand between the ocean and the seawall. What is the best explanation as to what happened to the sand?
A.
The wind from the hurricane destroyed the sand.
B.
The heavy rains from the hurricane packed the sand down.
C.
The hurricane created giant waves that washed away the sand.
D.
The hurricane damaged the sea wall, and the sand behind it washed away.
The beaches are water body that is characterized by the presence of sand barriers. The sand was reduced as the giant waves created by the hurricane, washed it away. Thus, option C is correct.
What is a hurricane?Hurricane is a natural disaster also called a tropical cyclone that is characterized by a storm system with a center having low pressure and the surrounding strong winds with a spiral rotatory movement. This leads to heavy rain and winds.
The hurricane in the oceans causes giant oceanic waves to form, that comes to the seawall and take sand away with them. This leads to a decrease in the sand from the beach area. The waves wash the sand from the land, as the seawater is pushed on the seashore by heavy rains and storms.
Therefore, option C. hurricane washes the sand off the coast.
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Why do you think DNA evidence is the best evidence for determining how closely related organisms are?
Answer:
DNA evidence can show the evolution patterns of organisms, the relationships among species, and how evolution occurs. Because of this, DNA evidence can show how closely related organisms are by comparing DNA and genetic codes to show their shared ancestry and how they evolved.
Hope this helps! :)
Write a paragraph about the importance of the ocean.
There are more than 600 muscles in the human body. Your heart is a muscle. Muscles make you breathe and muscles hold you upright. Which of the following statements is correct?
Answer: 1& 2
Explanation:
If it is multiple choice it would be "there are more than 600 muscles in the human body" and "your heart is a muscle" It would be both because both statements are true - Good luckI will give brainliest and thanks to the first person to answer! :) What were the econauts in the biodome doing with their dead matter and how is it connected to the decomposers?
Answer:
Explanation:
the Econauts constructed an ecosystem sealed under glass—a biodome. Recently, the group noticed an ominous decrease in the populations of organisms: the ecosystem appeared to be in the process of collapsing. The occupants were safely removed from the biodome, but the cause of the crash is still a mystery.