During which year does one one of the projections show the human population reaching carrying capacity?
A - 1960
B - 2020
C - 2045
D - 2080
(APEX) Please help!!​

Answer:

Kudzu competes with native plants for sunlight and nutrients, making it an invasive plant species. It could also be considered a parasite since it allows less sunlight to reach the plants that Kudzu covers.

Answer:

Kudzu competes with native plants for sunlight and nutrients.

Explanation:

Kudzu has become an invasive plant in the United States. At first, we can imagine that invasive plants do not cause major impacts to the environment, however, any species that is introduced in a new location affects the entire ecosystem considerably. Invasive plants multiply in large numbers and end up competing with the plant species that live there, by sunlight and nutrients.

Briefly, we can say that the invading plant completely removes the space of native plants. They come to dominate the natural landscape, to modify the natural cycles that existed in that ecosystem and, consequently, threaten the local biodiversity.

I believe the answer is C

Answer:

The correct answer would be option A. half moon shaped.

Explanation:

Sickle-cell anemia is a genetic disorder in which normal blood cells become rigid or stick and look like a crescent moon or half moon shape. In sickle-cell anemia condition, there are not sufficient healthy red blood cells or RBCs to carry enough oxygen throughout the body.

In sickle-cell anemia, the mutation causes a single change in the amino acid of hemoglobin, the building block of oxygen-transport protein. The alpha and beta subunits are the two subunits of hemoglobin. In sickle cell anemia, the beta subunit has valine at position 6 instead of glutamic acid that is present in normal hemoglobin.

Thus, the correct answer is option A. half moon shaped.

Answer: staphylococci bacteria.

Explanation:

Answer:

The correct answer will be biofilm.

Explanation:

Biofilm is an aggregate of micro-organisms formed of one or more types which can grow on different surfaces such as dental plaque formed on the surface of teeth. The biofilm mass is mostly composed of proteins, extracellular polysaccharides (EPS), and DNA.

Bacterial formed biofilms show resistant to antibiotics like biofilm formed by Staphylococcus aureus which causes wound infections. Poly-microbial biofilms are usually more resistant to antibiotics compared to single-species biofilms. EPS present in the biofilm attaches antibiotics.

Thus, biofilm is the correct answer.

Answer:

the correct answer is D.

Explanation:

Nutrients and energy-rich molecules from digested food are transported to cells via the digestive and cardiovascular systems, with the lymphatic system also playing a role in lipid absorption. Digestion begins with mechanical and chemical processes, and absorption occurs mainly in the small intestine where nutrients enter the bloodstream or lymphatic system.

D is correct

The nutrients and energy-rich molecules are transported to our cells through a collaborative effort of several systems, chiefly the digestive system, the cardiovascular system, and the lymphatic system. After food is consumed, it undergoes two types of digestion - mechanical and chemical. The former breaks food into smaller pieces, beginning in the mouth and continuing in the stomach, whereas the latter breaks down food molecules into small nutrient molecules and begins with saliva in the mouth and continues with stomach enzymes.

The absorption of these nutrients mostly occurs in the small intestine, where they pass into the blood vessels lining the intestine to enter the bloodstream. In the case of lipids, the glycerol and fatty acids are absorbed into the lymphatic system before being released into the bloodstream. After absorption, the nutrients are circulated to all the cells for energy production and cellular functions. Meanwhile, waste products and non-absorbed materials pass through the large intestine for excretion, facilitated by the excretory system.

Answer:

D. Spanned from about 3.8 billion to about 2.5 billion year ago

Explanation:

The Archean eon expanded from 4 billion years ago, until 2.5 billion years ago, being predeceased by the Hadean eon, and being followed by the Proterozoic eon. During this eon there were numerous very important things that happened. The first solid rocks were formed, thus the basis for the first continents arrived on the scene. The oldest fossils of living organisms are also dated to this eon, and they were the ones that started to slowly change the atmosphere by introducing free oxygen molecules to it.

Answer:

Invasive species are those species that are non native to a given ecosystem of concern and also whose introduction causes or is likely to cause economic or environment harm or harm to the organisms in the ecosystem. They are considered as the second most threat to biodiversity, after habitat loss.

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The Answer D sound logical however I’m not sure about the 4 new chromosomes

During meiosis I, homologous chromosomes pair up, recombine through crossing over, and separate into two daughter cells, reducing the chromosome number from diploid to haploid.

During meiosis I, the main event is the separation of homologous chromosomes into two different daughter cells. Initially, homologous chromosomes pair up during prophase I, allowing for crossing over and genetic recombination, which introduces genetic variation. Each chromosome, consisting of two identical sister chromatids, then lines up with its homologous partner in the middle of the cell during metaphase I.

Following this alignment, the homologous pairs are pulled apart by the spindle fibers, and each moves towards opposite poles of the cell. This step ensures that each of the resulting two daughter cells contains just one chromosome from each pair, thereby reducing the chromosomal number by half, from diploid to haploid. Thus during meiosis I, chromosome pairs separate and are distributed into new sex cells, rendering answer choice (A) correct.

Answer:

b

Explanation:

the answer is b. hope this helped!

Gene therapy is successful if the replacement gene is transcribed in the person's cells

Answer:

C. DNA polymerase

Explanation:

DNA polymerase is the enzyme that makes new DNA strands using existing DNA strand as a template. Use of radioactive deoxyribonucleotides as raw material for DNA synthesis makes DNA polymerase to use these radioactively labeled dNTPs to make new DNA strands.

Hence, DNA polymerase enzyme can make radioactively labeled DNA by using radioactive deoxyribonucleotides as raw material.  

Final answer:

The correct enzyme for creating radioactively labeled DNA is C. DNA polymerase; it allows the addition of labeled nucleotides during replication or PCR.

Explanation:

The enzyme used to make radioactively labeled DNA is DNA polymerase. This enzyme adds nucleotides to a DNA strand during replication or PCR (polymerase chain reaction), allowing the incorporation of radioactively labeled nucleotides. In contrast, DNA nuclease breaks down DNA molecules, DNA phosphatase removes phosphate groups, and DNA ligase joins DNA strands together. When synthesizing cDNA from RNA, reverse transcriptase is used to reverse transcribe RNA into DNA. Additionally, eukaryotic cells use telomerase during DNA replication to extend the ends of chromosomes. The enzyme primase synthesizes an RNA primer, which is then extended by DNA polymerase. During DNA proofreading, DNA polymerase reads the DNA to correct errors. In the case of a cell strain with impaired joining of Okazaki fragments, the enzyme most likely to be mutated would be DNA ligase.

Answer:

13

Explanation:

At the end of mitosis there would be half the amount of cells. Therefore, 13 daughter cells.

half the amount of cell.

13 daughter cells will be created.

In cell biology, mitosis is part of the cell cycle in which replicated chromosomes are separated into new nuclei. cell division by mitosis gives rise to genetically identical cells wherein the total number of chromosomes is maintained. therefore, mitosis is also known as equational division.

Mitosis is the process by which a cell replicates its chromosomes and then segregates them, producing two equal nuclei in preparation for cell division. Mitosis is normally followed by an equal division of the cell's content into daughter cells that have identical genomes.

Learn more about mitosis here

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Answer:c

Explanation:

Answer:

The correct answer will be option B (5′ and the 3′ end, based on modifications in the deoxyribose sugar).

Explanation:

DNA is a large molecule which acts as genetic material of the organisms. DNA exists in intertwined double helical form consisting of two DNA chains or strands.

Each DNA strand is a long, continuous thread like structure made up of repeating units called nucleotides. Each nucleotide comprises of three subunits:   five carbon sugar called deoxyribose, phosphate group and nitrogen-containing bases.

Each nucleotide is connected to next nucleotide by the formation of phopho-diester bond between free 5’ phosphate (PO³⁻₄ ) group of one nucleotide and the 3’-OH group of another deoxy-ribose sugar. This gives a phosphate-sugar-phosphate-sugar chain which forms the backbone of DNA molecule and is read in 5’ -> 3’ direction.

Thus, option B is the correct answer.

Answer:

A. More hydrogen ions inside the membrane than outside it

Explanation:

During electron transfer from water molecule to PS II and then through electron transport chain to the PS I pumps the hydrogen ions inside the thylakoid lumen. ATP synthesis is driven by energy of proton concentration gradient that moves the hydrogen ions (protons) from lumen of thylakoid membrane towards the stroma. Hence, ATP synthesis requires presence of more hydrogen ions inside the membrane.

Answer:

Dopamine is the correct answer. Dopamine would be the neurotransmitter expected to be seen in high quantities in the brain of someone who has be rewarded.

Explanation:

Dopamine can be described as an important chemical that serves both as a hormone and as a neurotransmitter in the body.

One of the dopamine pathways in the brain is involved in sending signals for the reward system. This system is responsible for the generation of signals for reward or craving for rewards, positive attitude, pleasure etc. Hence, the neurotransmitter, dopamine would be present in enhanced quantities in the brain of a person who has been rewarded with pay raise.  

Answer:

Dopamine

Explanation:

Dopamine can be described as an important chemical that serves both as a hormone and as a neurotransmitter in the body.

One of the dopamine pathways in the brain is involved in sending signals for the reward system. This system is responsible for the generation of signals for reward or craving for rewards, positive attitude, pleasure etc.

Answer:

B Injury repair may occur more quickly

Explanation:

Gene expression controls protein production, which is essential for cell function. Overproduction of proteins can sometimes be beneficial, such as hastening injury repairs, but can also lead to detrimental effects, like causing cancer.

Option B is correct

Genes, which are sections of DNA, contain the information needed to produce proteins. Gene expression, or the process of turning on a gene to produce RNA and protein, is controlled by the cell to ensure the right amount of protein is produced at the right time. The regulation of protein production is fundamental for cell function and health.

Regarding the potential benefits of overproducing proteins, option b, 'Injury repair may occur more quickly', could be considered beneficial. Increased protein production could speed up processes in the body like tissue repair and cell growth. However, it's important to note that not all overproduction of proteins is beneficial. In fact, abnormal protein production could lead to severe problems. For example, as stated in option d, an overproduction of proteins can lead to the development of cancer. This occurs when genes that stimulate cell division (proto-oncogenes) become overly active or when genes that suppress tumors do not function properly, causing uncontrolled cell growth and proliferation.

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a. Vision

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The vision sense contains photoreceptors called rods and cones. Rods detect light and dark and are crucial for peripheral and night vision, while cones function under bright light allowing us to see color and detail.

The sense that contains two types of photoreceptors known as rods and cones is vision. These photoreceptors are located in the retina, a layer at the back of the eye. Rods are responsible for detecting light and dark, making them crucial for peripheral and night vision. Cones, on the other hand, allow us to see color and detail as they function best under bright light conditions.

Vision is the sense that contains two types of photoreceptors called rods and cones. Rods are responsible for vision in dim light, while cones allow for color vision and work best in bright light.

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Answer:

Transgenic

Explanation:

Recombinant DNA technology is used to make transgenic organisms. Genetic material from one specie is inserted into the genome of another thus modifying its characteristics. There are several ways of doing this including electroporation and transduction. This process is referred to as genetic engineering.

Answer:

transgenic

Explanation:

Answer:

A. A-C-T-G-C-G-A-T

Explanation:

An insertion is when a DNA base is added into a DNA strand usually from mutations.

Answer:

A. Convergent evolution

Explanation:

If analogous or structurally different oragns performing similar function.. We call that convergent evolution.

Answer:

The correct answer is option A, that is, convergent evolution.

Explanation:

The convergent evolution in evolutionary biology refers to the phenomenon in which the organisms that are not closely associated, that is, not monophyletic, autonomously evolve identical characteristics as a consequence of having to amend to ecological niches or identical surroundings.  

For example, the evolution of lungs and gills that serves similar functions in distant organisms is an illustration of convergent evolution.  

Answer:

Plant cells carry chloroplasts: organelles containing the pigment chlorophyll, which they employ to entrap sunlight

Hope this helps!

Chloroplasts have chlorophyll in them, this is a green pigment which helps to trap sunlight which enables photosynthesis for a plant.

It is c my friend hope this helps

Answer:

Option (D)

Explanation:

The Devonian period represents the fourth period of the Paleozoic era, ranging from about 420 million years to 360 million years back. This period represents the age of fishes because a variety of fish species were present and also during this time, the plants that colonized on the land areas started undergoing evolution giving rise to the formation of gymnosperms.

By the end of this period, about 360 million years ago, massive and rapid volcanic eruptions took place, that released an extensively large amount of carbon dioxide into the atmosphere. This eventually lead to a mass extinction event, eliminating nearly 80% of the total living species present on earth.

Thus, the correct answer is option (D).

Answer: Thrue

Explanation:

The temperatures on land change more rapidly than temperatures on water.

Answer:

Due to high specific heat capacity of water as compared to land

Explanation:

The specific heat capacity of water is much higher as compared to land. Specific heat is the amount of heat required to raise the temperature of anything by a unit degree ( of either Celsius or Fahrenheit).  

Thus, water in ocean and coastal areas take much longer time to heat. In the same way coastal areas need much longer time to release the absorbed heat. Thus, the temperature is coastal area is more or less stable as compared to non coastal areas where cooling and heating of the atmosphere takes place quickly.

Answer:

The answer is: The best estimate for the wind speed is 47.15 - 54.05 miles/hour.

The knot is a unit of speed equal to one nautical mile per hour, approximately 1.15 mph.

The ISO standard symbol for the knot is kn.

v(wind) = 41-47 kn; speed of strong gale.

v(wind) = 41 · 1.15 mph.

v(wind) = 47.15 mph.

v(wind) = 47 · 1.15 mph.

v(wind) = 54.05 mph.

Answer:

Prey population explosion

Explanation:

If a major predator is removed from the ecosystem, it will disturb the predator-prey relationship in the ecosystem that will result in the direct increase in the prey population. This phenomenon is called population explosion where there is no check and balance on the prey population.

For example, if there is a major predator in the forest ecosystem it will feed on herbivores and keep their population at a certain level. This is called predator-prey balance where predators kill prey which in-turn cause food scarcity for predators and leads to a decrease in predator population too. So if any major predator is removed from ecosystem it will disturb this intricate balance.

Hope it helps!

Answer:

The population of prey would increase/

Explanation:

Hope this helps. :>

B. it has pairs of matching chromosomes.

Have a great day!

If a species has homologous chromosomes it means that It has pairs of matching chromosomes.

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Answer:

D. The rain

Explanation:

It cannot be A, B, or C because those are all LIVING organisms and abiotic is not alive. The canopy is part of the trees which is alive same for the next 2 options

So option D is your answer

Answer: Changing Patterns Of Ocean Currents Is The Correct Answer.

Answer:pollution i believe is the answer

Explanation: