Answer:
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Explanation:
Answer:
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1. Which of the following events is not a source of genetic variation in eukaryotic organisms?
J. Mutation
K. Independent assortment
L. Mitosis
M. Fertilisation
2. Which statement best describes the process of endocytosis?
J. A vesicle within a cell fuses with the plasma membrane and releases its contents to the outside
K. Solid particles or liquid are taken up by a cell through invagination of the plasma membrane
L. Investment in one cytosis reduces the ability of the parent to assist another cytosis
M. One region of an embryo directs the development of neighbouring region of an embryo through movement of cells
3. In eukaryotic cells the conversion of ADP and phosphate into ATP occurs (KA1)
J. only in the mitochondria, and requires energy.
K. only in the cytoplasm, and releases energy.
L. in both the mitochondria and the cytoplasm, and requires energy.
M. in both the mitochondria and the cytoplasm, and releases energy.
4. One consequence of having small regulated steps in an energy pathway is (KA1)
J. an increase in the activation energy for the pathway.
K. a decrease in the amount of heat lost from the pathway.
L. a decrease in the amount of ATP released from the pathway.
M. an increase in the total energy released from the pathway.
5. Adult stem cells in bone marrow can differentiate into a variety of cell types e.g brain, skin, lungs, heart, liver and muscle.
Stem cells that are transplanted from a healthy donor into a patient (recipient) will divide and differentiate into cells of like form and function to the surrounding cells.
The adult stem cells from the bone marrow of the donor would be genetically identical to the cells of the
J. recipient, and divide by mitosis.
K. donor, and divide by mitosis.
L. recipient, and divide by meiosis.
M. donor, and divide by meiosis.
Answer:
1. Mitosis
2. K. Solid particles or liquid are taken up by a cell through invagination of the plasma membrane
3. L. in both the mitochondria and the cytoplasm, and requires energy.
4. J. an increase in the activation energy for the pathway.
5. K. donor, and divide by mitosis.
Explanation:
The sources of genetic variation in a population with sexual reproduction are 1-mutation, which can be defined as genetic changes in the genome of an organism that create new alleles in the population, 2-independent assortment, where pairs of homologous chromosomes are randomly separated, during meiosis, 3-fertilization, where two gametes held together to form the zygote cell (thereby creating new genetic combinations), and 4-recombination or crossing over (i.e., the exchange of genetic material between non-sister chromatids during meiosis). Endocytosis is a cellular process by which substances enter into the cell by invagination of the cell membrane (this term is contrary to exocytosis). In eukaryotic cells, mitochondria are organelles whose membranes produce ATP from ADP and Pi by aerobic respiration (i.e., by the Krebs Cycle and electron transport chain), while glycolysis occurs in the cytoplasm. This process requires the addition of energy (chemical energy in the form of organic compounds). An energy pathway that has many small regulated steps is expected to produce intermediate products and increase its activation energy. Finally, stem cells that derive from a donor and are genetically identical it is expected that divide by mitosis.
Which statement best describes a difference between a molecule of DNA and a molecule of RNA?
A)DNA contains genetic informationwhile RNA does not
B)RNA contains the letter in place of the letter T in DNA
C)DNA has 1 strand, while RNA has 2
D)RNA uses the letter C. while DNA does not
Answer: B
Explanation:
How do invasive species usually affect the availability of natural resources in an ecosystem?
PLEASE HELP ME
Answer: Invasive species can harm both the natural resources in an ecosystem as well as threaten human use of these resources. ... Invasive species are capable of causing extinctions of native plants and animals, reducing biodiversity, competing with native organisms for limited resources, and altering habitats.
Explanation:
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Muscular Strength and Endurance: Mastery Test
4
Select the correct answer.
What must skeletal muscles do to move?
A.
engage their fibers slowly
В.
twitch involuntarily
Oc.
separate from the bone
O D.
contract and relax
Reset
Next
Explain the relationship between mutations, adaptations,
natural selection, and extinction.
Answer: A mutation results in different alleles for a gene and these different alleles will cause adaptations that may be favorable or unfavorable. If no species in an area has adaptations suited for the environment after it changes, extinction will occur.Adaptations result from random mutations in the genes of organisms. Depending on the environment, these adaptations may be favorable or unfavorable. If an adaptation is favorable, it is selected by nature and, over time, more and more organisms in a population will have it. If the environment changes so much that the adaptations of a species are no longer enough for the species to survive, extinction will occur.Mutations is very different because it results in different alleles for a gene.Adaptations is where an animals ADAPTS to an environment.Natural selection consists of overproduction,variation, favorable adaptations.extinction is when a species completely disintegrates.
Explanation:
Answer:
A mutation results in different alleles for a gene and these different alleles will cause adaptations that may be favorable or unfavorable. If no species in an area has adaptations suited for the environment after it changes, extinction will occur.Adaptations result from random mutations in the genes of organisms. Depending on the environment, these adaptations may be favorable or unfavorable. If an adaptation is favorable, it is selected by nature and, over time, more and more organisms in a population will have it. If the environment changes so much that the adaptations of a species are no longer enough for the species to survive, extinction will occur.Mutations is very different because it results in different alleles for a gene.Adaptations is where an animals ADAPTS to an environment.Natural selection consists of overproduction,variation, favorable adaptations.extinction is when a species completely disintegrates.
Explanation: got it on ed :)
what are some similarities for prophase and telophase
Answer:
Both prophase and telophase have a complete set of chromosomes and organelles.
1. Which of the following events is not a source of genetic variation in eukaryotic organisms?
J. Mutation
K. Independent assortment
L. Mitosis
M. Fertilisation
Answer:
Mitosis
Explanation:
Mitosis is not a source of genetic mutation because it take place mostly in the somatic cells. This is because it does not lead to the production of gametes . In mitosis, the parent cells divide into two daughter cells and each daughter cells are genetically identical to the parent cell because they carry the same number of chromosomes as the parent cell. There is no genetic variation in this.
Sexual reproduction results in offspring that are *blank*
from both parents?
A. different
B. same
C. opposite
D. none of these
Answer:
I would put unique but since that's not a choice, probably different
Explanation:
Answer:
A. Different
Explanation:
In sexual reproduction, the offspring inherits traits from both parents. They are not an exact copy of either but have traits from both. Hope it helps :)
Match the elements to their periodic table groups based on their uses or properties
when is the best time to harvest crops?why?
[tex] \huge \bold \blue{★Question★}[/tex]
When is the best time to harvest crops? why?
[tex] \huge \bold \blue{★Answer★}[/tex]
Correct timing of harvest is crucial to crop loss prevention. Grain losses may occur caused by rats, birds, lodging, insects, and shattering. Timely harvesting ensures good grain quality and high market value.
Harvesting too early will result in a higher percentage of unfilled or immature grains, which will lower the yield and cause higher grain breakage during milling. Harvesting too late will lead to excessive losses and increased breakage in rice. Harvest time also affects the germination potential of rice seed.
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There are different ways to determine the correct harvest time:
Moisture content
Grain moisture content ideally is between 20−25% (wet basis). Grains should be firm but not brittle when squeezed between the teeth.
Ripe grains per panicle
The crop should be cut when 80−85% of the grains are straw (i.e., yellow-colored).
Number of days after sowing
Generally, the ideal harvest time lies between 130 and 136 days after sowing for late, 113 and 125 for medium, and 110 days for early-maturing varieties.
Number of days after heading
For dry season harvesting, an optimum time is 28 to 35 days after heading. In wet season harvest, optimum time is 32 to 38 days after heading.
Other considerations
Harvesting also needs to be timed so that threshing can be done as soon as possible after cutting to avoid rewetting and to reduce grain breakage.
If the crop has a lot of surface moisture, (e.g. from previous rainfall or early in the morning), it is advisable to wait until the surface moisture dries off.
In animals, glucose is absorbed from the gut into intestinal cells against its concentration of gradient. This one-way process requires energy to work. Which of the following best describes how glucose is absorbed into intestinal cells?
A. By osmosis
B. By diffusion
C. By a buffer
D. By active transport
Answer: Glucose is absorbed through the intestine by a transepithelial transport system initiated at the apical membrane by the cotransporter
Explanation:
if im wrong ill give you your points
Osmosis best describes how glucose is absorbed into intestinal cells.
What do you mean by osmosis?
Osmosis is the movement of water molecules from a solution with a high concentration of water molecules to a solution with a lower concentration of water molecules, through a cell's partially permeable membrane.
Osmosis is when water moves from an area of LOW solute concentration (low osmolarity) to an area of HIGH solute concentration (high osmolarity) through a semipermeable membrane. Osmosis is one of the most important ways that plants and animals achieve homeostasis.
The absorption of water from the soil is due to osmosis. The plant roots have a higher concentration than the soil. Therefore, the water flows into the roots. The guard cells of the plants are also affected by osmosis.
Learn more about osmosis:
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why is cancer considered a genetic disease of somatic cell?
Compare the reproduction in Hydra and Amoeba?
Answer:
Hydra:
Reproduction by budding in Hydra.
Amoeba:
Reproduction by binary fission in Amoeba.
Hydra:
Budding means sexual reproduction in which a new organism develops from a bud in the parent.
Amoeba:
Binary fission is the type of asexual reproduction in which the parent divides to give rise to two daughter organisms.
Hydra:
In budding process, bud is simply an outgrowth of cells at one particular site.
Amoeba:
The parent replicates its genetic material and divides it equally between the two daughters in binary fission.
Hydra:
The bud or the newly formed organism remains attached to its parent until maturation.
Amoeba:
Both the cytoplasm and the nucleus of the parent divides into two.
How is the instructions for your traits carried on a DNA molecule?
Sequence of the nitrogen bases
In the bond between the phosphate and the sugar
O In the Deoxyribose Sugar
O In the phosphate group
Sequence of the nitrogen bases
# 14 please!!!! will give brainliest
Answer:
Within the bone marrow, all blood cells originate from a single type of unspecialized cell called a stem cell. When a stem cell divides, it first becomes an immature red blood cell, white blood cell, or platelet-producing cell.
Explanation:
I am not sure if this helps you....
The____ of an ecosystem is based on wheather the population in the system destorys the natural resources of the system
Answer: immense
immense in the blank
please make me brainliest
100 POINTS! AND GIVE EXPLANATION!
a student made this model of carbon dioxide moleclue. it has one carbon atom and two oxygen atoms what is the correct way to write carbon dioxide the chemical name for
A: C2O
B: C²O
C: CO2
D: CO²
Answer:
CO₂
Explanation:
In chemistry we use subscripts after the element represented by that amount.
Answer:
C: CO2
Explanation:
Carbon has four valence electrons. Oxygen needs two valence electrons to become stable. A carbon dioxide molecule is a combination of one carbon atom and two oxygen atoms, CO2. Because carbon dioxide includes two different elements, it is a compound as well as a molecule.
Hope this helped!!!
PLEASE HELP !! ILL GIVE BRAINLIEST *EXTRA 40 POINTS* DONT SKIP :(( .!
Answer:
it's a because
When we burn oil, coal, and gas, we change the ocean's basic chemistry, making it more acidic. Our seas absorb as much as a quarter of all man-made carbon emissions. Since the start of the Industrial Revolution (and our coal-burning ways), the ocean has become 30 percent more
Answer:
A - Burning coal
Explanation: When you burn coal you create polution which contributes to global warming, and global warming warms up the earth.
Pandas evolved longer wrists to better eat bamboo over a long period of time and this in turn increase
their possibility of survival. This is an example of:
a. Artificial Selection
b. Adaptation
c. Biodiversity
d. Homeostasis
Answer:
B adaption
Explanation:
The scenario in which the Pandas evolve longer wrists to better eat bamboo over a long period will increase the possibility of artificial selection. The correct option is A.
What is artificial selection?Artificial selection, also renowned as "selective breeding," is the practice of selecting for positive traits in agricultural products or animals rather than allowing the species to change and evolve naturally, as in natural selection.
The process by which organisms can choose individual lifeforms with specific phenotypic trait values for breeding is known as artificial selection. If the selected trait has additive genetic variance, it will respond to selection, i.e., the trait will evolve.
Adaptation entails dealing with both the physiological abiotic environment such as light, dark, temperature, etc. but in addition to the intricate biotic environment.
Pandas evolved longer wrists to better eat bamboo over a long period of time and this in turn increase their possibility of survival. This is an example of artificial selection.
Thus, the correct option is A.
For more details regarding adaptation, visit:
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Help stepbro im stuck in the washer
Answer:
I'LL HELP YOU......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................NOT
what is cell and its function
Cells are the basic building blocks of all living things.
They provide structure for the body, take in nutrients from food, convert those nutrients into energy, and carry out specialized functions.
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Definition:-
“A cell is defined as the smallest, basic unit of life that is responsible for all of life’s processes.”[tex]\rightarrow[/tex] Cells are the structural, functional, and biological units of all living beings. A cell can replicate itself independently. Hence, they are known as the building blocks of life.
[tex]\rightarrow[/tex]Each cell contains a fluid called the cytoplasm, which is enclosed by a membrane. Also present in the cytoplasm are several biomolecules like proteins, nucleic acids and lipids.
[tex]\sf\large\underline\purple{Functions:-}[/tex]
Following are the various essential functions of cells:
Cells provide structure and support to the body of an organism.The cell interior is organised into different individual organelles surrounded by a separate membrane.The nucleus (major organelle) holds genetic information necessary for reproduction and cell growth.Every cell has one nucleus and membrane-bound organelles in the cytoplasm.Mitochondria, a double membrane-bound organelle is mainly responsible for the energy transactions vital for the survival of the cell.Lysosomes digest unwanted materials in the cell.______________________________
Explain the differences between Earth’s crust, mantle, outer core, and inner core.
Answer:
Earth's crust is the coldest Earth layer. Rock makes up the mantle and crust. The Outer core is liquid and the inner core is solid.
Explanation:
Outer and Inner core are both are made mostly of iron, with a little nickel and some other chemical elements.
Drag the tiles to the correct boxes to complete the pairs. Identify the type of energy described in each sentence.
Pairs:
The body stores lipids ingested as fat and uses Thai energy when needed.
A persons hat falls off and lands on the ground.
A wave of water pushes a surfer to shore.
A burner on a stove heats up a tea kettle.
A power plant splits atoms to generate power for a city.
A nerve sends an impulse to another nerve.
A plant absorbs the suns rays to start the process of photosynthesis.
Tiles:
Gravitational Energy
Mechanical Energy
Chemical Energy
Electrical Energy
Thermal Energy
Nuclear Energy
Radiant Energy
Answer:
chemical energy
gravitational energy
mechanical energy
thermal energy
nuclear energy
electrical energy
radiant energy
Explanation:
Edmentum users .
What makes Kingdom Protista unique compared to the other kingdoms?
give three example of fungi
Answer:
Yeasts
mold
mushrooms
Explanation:
The amount of solar radiation received by the earth is greatest
at
a
The equator
b The mid-latitudes
С
The poles
d None of the above
Why is a sea otter a “keystone”??
Explanation:
Sea otters are an iconic species, representing the beauty and diversity of marine life found along California’s coastline. They’re also considered a keystone species because of their critical importance to the health and stability of the nearshore marine ecosystem. They eat sea urchins and other invertebrates that graze on giant kelp.
Name two types of lateral pathways for the movement of sucrose from source cell into the sieve tube
Answer:
Diffusion and active transport.
Explanation:
Diffusion and active transport are the two types of lateral pathways that is responsible for the movement of sucrose from source cell into the sieve tube. Sugar molecules are moved into the sieve elements which are the phloem cells through active transport i.e. with the use of energy. The water produces turgor pressure in the sieve elements, which pushes the sugars and fluids down the phloem tubes toward the storage sites. it also moved through simple diffusion due to difference in concentration i.e. from higher to lower concentration region.
"What do the four genotypes inside the 4 boxes of a Punnett Square represent?
Answer:
They represent the percent chance to inherit a type of genotype. Recessive alleles, dominant alleles, heterozygous have chances to appear based off the parent alleles.
The brain send signals that control the speed at which food moves through the digestive system. What systems are involved?
A.Circulatory, Immune, digestive
B.Muscular, Digestive, Immune
C.Digestive, Muscular, Nervous
D.Respiratory, Endocrine, Digestive