Answer:
I believe its gene manipulation and overpopulation
Explanation:
Today, hominid brains are ________ than hominid brains six million years ago.
A.smaller and more efficient
B.larger and more complex
C.softer and more segmented
Hominid brains today are larger and more complex than those six million years ago. The increase from less than 400 cc in early hominins to about 1400 cc in modern humans is due to factors like environmental pressures, diet changes, and competition for resources. This growth reflects significant evolutionary changes, including the development of more complex brain structures.
Hominid Brain Evolution
Today, hominid brains are larger and more complex than hominid brains six million years ago. During this time, our ancestors' brains have increased in size from a chimp-sized brain of less than 400 cubic centimeters in the earliest hominins to an average of approximately 1400 cubic centimeters seen in modern humans. This significant increase in brain volume, known as encephalization, came about in response to various factors, including environmental pressures and competition for resources. Fossils like Homo habilis and Homo erectus illustrate this growth in brain size and the accompanying changes in skull morphology such as a more rounded skull and less prognathic face. Additionally, there's a notable shift towards lateralization as seen in endocasts, suggesting a more developed cerebral cortex which correlates with increased intelligence and cultural adaption.
A fascinating aspect of this evolutionary process was the trade-off that took place: as the human diet shifted to higher quality foods, our gut could reduce in size, allowing for the brain to grow. This brain expansion had profound implications, such as the need for prolonged care of offspring due to increased altriciality. These changes collectively point towards an evolutionary trajectory that favoured the development of a larger and more intricate brain architecture in hominins over time.
What is the primary reason humans form communities?
Answer:
Human beings primarily form communities to meet the need of the group and the individuals. It is the need for the social well being of the individual. There are certain needs of a group of individual to survive in the society. They must interact with one another to live happily
Explanation:
How was NASA developed?
Answer:
NASA is a U.S goverment acengy. It is responsible for sciecne and technology realted to air and space.
Explanation:
NASA opened for on October ,19.58. The agency was created oversee U.S space exploritation and areonautics research.
NASA stand for (National Aeronautics and Space Administration.)
How did the appearance of large animals in Earth's early history impact the geosphere?
Answer: Most likely caused land erosion is your answer.
Explanation: Hoped i helped I am 100% sure this is correct!
Answer:
B) caused land erosion
Explanation:
its on usatestprep
insulin is most directly related to which function
•movement
•feeding
•reproduction
•homeostasis
Answer:
Insulin is most directly related to homeostasis.
Explanation:
Homeostasis is the ability to maintain balance of body against a change in the environment. Insulin is a harmone which controls the glucose level in the blood. If the glucose level is high in the blood, the insulin gives message to the liver to absorb glucose from the blood and when glucose level is low, the liver released glucose into the blood. So insulin helps in the homeostasis of the body.
Answer:
The answer is D. Homeostasis
Explanation:
Which deep-water body is a unique feature of the Southern Ocean?
The
water is a saline, cold, and dense body of water lying deep in the Southern Ocean, traveling northward.
Final answer:
The Antarctic Bottom Water is the unique deep-water body in the Southern Ocean characterized by its high salinity, cold temperature, and density, contributing to global ocean circulation and supporting a distinct ecosystem.
Explanation:
The unique deep-water body in the Southern Ocean known for its cold, saline, and dense properties is the Antarctic Bottom Water (AABW). This body of water forms near Antarctica, where sea ice production increases the salinity and density of the water, causing it to sink to the ocean floor. The AABW flows northward from its formation sites and is crucial for driving global ocean circulation. It significantly contributes to the cold, nutrient-rich deep waters and maintains the ocean's thermohaline circulation. Due to the depth and density, the AABW occupies the abyssal zone, which is known for its high pressure and cold temperature, supporting unique ecological systems based around hydrothermal vents and chemosynthetic bacteria.
At the Subtropical Convergence, the AABW interacts with warmer waters from the Pacific, Atlantic, and Indian Oceans, creating upwelling zones that support a diverse marine life, including various invertebrates and fish, and serve as feeding grounds for species like krill, which are vital for the Southern Ocean's food chain.
There are too many potassium ions inside a cell. As a result, the cell
membrane expands and bursts. Which problem was the cell most likely
having?
O
A. The cell is unable to spontaneously generate.
O
B. The cell was unable to maintain a stable internal environment.
O
C. The cell is unable to build more protein molecules.
O
D. The cell is unable to produce water molecules inside the cell.
SUBMIT
Answer:
the cell was unable to maintain a stable internal environment.
Explanation:
Final answer:
The cell likely had trouble maintaining a stable internal environment (B) due to an imbalance of potassium ions which disrupted osmotic balances, causing the cell to swell and burst.
Explanation:
The cell was most likely having a problem with maintaining a stable internal environment. When there are too many potassium ions inside a cell, it usually indicates an issue with osmoregulation. Normally, the cell membrane is selectively permeable, maintaining the balance of ions through mechanisms like the sodium-potassium pump and ion channels. If the cell is inundated with potassium, this balance is disrupted, potentially causing an influx of water into the cell due to osmotic forces, leading to cell swelling and ultimately bursting, or lysis. Cells depend on the movement of ions and water to maintain their internal osmolarity. An imbalance in ion concentrations, particularly with the exit of potassium ions being hindered, can result in a hypotonic environment inside the cell. This encourages water to move into the cell, leading to increased pressure and risk of membrane rupture.
Given the information in the velocity vs. time graph, what is the displacement of the object after 1 second?
Answer:3m, 9m, 15m
Explanation:
Answer:
3, 9, 15
Explanation:
got it correct
In the past 10,000 years, when did the human population experience negative growth?
A) during the Christian era
B) during the Industrial Revolution
C) during the Bubonic plague
D) near the Grinnell glacier
Answer:
C is the correct answer
Explanation:
The bubonic plague has reduced the world population from an estimated 475 million to 350–375 million.
Gold's atomic number is
79.
What does that tell you?
A. Gold has 79 ions.
B. Gold has 79 neutrons.
C. Gold has 79 protons.
Answer:
C.Gold has 79 protons.Atomic number defined as the number of electrons or number of protons in an atom's free state.
HOPE U UNDERSTOODHOPE U UNDERSTOODMARK AS BRAINLIEST ONE
Any doubts?v Please COMMENT..
Generalizations, explanations of natural phenomena, and additional hypotheses most often come about as a result of
The explanations of natural phenomena, and additional hypothesis most often come about as a result of a scientific theory.
Explanation:
Scientific theory is a general explanation of natural phenomena developed through extensive and reproducible observations, more general and reliable than a hypothesis.
Then Every scientific theory starts as a hypothesis. A scientific hypothesis is a solution for an unexplained occurrence that does not fit into a currently accepted scientific theory. It must be based on careful rational examination of the facts.
What are the haploid forms of the water mold
The haploid form of water molds is represented by structures called sporangia.
What are molds?
Water molds, also known as oomycetes, are a group of microorganisms that belong to the kingdom Stramenopila. The life cycle of water molds typically involves both haploid and diploid stages.
The haploid and diploid stages alternate in the life cycle, which includes sexual and asexual reproduction.
The haploid form of water molds is represented by structures called sporangia. Sporangia produce haploid spores through a process called mitosis.
These spores can be released into the environment and, under suitable conditions, can germinate to form new haploid individuals. The haploid stage predominates in the life cycle during certain phases of reproduction and environmental conditions.
PLEASE I NEED HELP ASAP!!!!!!!!!!!!!! WORTH 45 POINTS AND WILL MARK BRAINLIEST ANSWER
You have just been hired by the Climates-R-Us travel agency. This agency specializes on putting together vacations to the various climates around the world. You have been assigned to develop a presentation on one of the six types of climates. This presentation will then be shown as a way to sell the vacations. Choose one of the six types of climates and create a presentation on the climate you choose. Tropical Climate Dry Climate Mild Climate Continental Climate Polar Climate Mountain Areas Your presentation must include: A description of the climate. Describe the type of weather during the summer and winter that one might expect in this climate. A discussion about how the altitude, distance from the ocean, amount of sunlight, distance from the equator, and ocean currents affect this climate. A location of the climate. Describe and provide pictures of a specific place in the world where the climate can be found. You can search the web to find locations and pictures of your climate. A sales pitch of why someone would want to vacation in this climate rather than in another climate. In your sales pitch, please include: Why this climate is better than the others for a vacation. Two possible activities for the people to do in this climate. Keep in mind that your activities must match the climate you have chosen. Someone would not go skiing in a tropical climate nor would they go to the beach in a polar climate. You can use any of the following ways to present your climate vacation presentation: Create a PowerPoint presentation Create a travel brochure Create a Web page
Tropical dry Climate: The weather is sunny pretty much all year. The ocean + the sun allows a tropical place to be great for growing food. Things such as coconuts and mangoes can be found. Its a great place to vacate because of the sunny climate, also clients will fall in LOVE with the warm beaches. Some activities would be to surf, sunbathe, and study the natural habitat. The animals are also very interesting. Monkeys and chameleons would be great temporary pets to take care of.
4. In the body of a human, the types of chemical activities occurring withir
cells are most dependent on the: *
O
A) biological catalysts present
O
B) size of the cell
O
C) number of chromosomes in the cell
D) kind of sugar found on each chromosome
The chemical activities in human cells are heavily reliant on enzymes, which are biological catalysts that speed up and control the biochemical reactions necessary for life. They function under specific environmental conditions such as pH and temperature, and their presence and activity levels are critical for cell functionality.Therefore, the correct answer to the question is A) biological catalysts present.
In the body of a human, the types of chemical activities occurring within cells are most dependent on the biological catalysts present, namely enzymes. Enzymes are essential because they accelerate and regulate biochemical processes, allowing reactions to occur quickly enough to sustain life. The effectiveness of these enzymes is influenced by a variety of factors, including pH, temperature, salt concentration, and the presence of cofactors or coenzymes.
Enzymes significantly lower the activation energy required for chemical reactions, thereby increasing the rate at which these reactions can proceed. This regulation is crucial for the proper functioning of cells and maintenance of life. Due to the tight control cells exert over enzymes, they are of paramount importance in determining the types and rates of biochemical reactions that occur within the cells.
Genes contain instructions for making
Answer:
The correct answer is protein and the term for the process is translation. The process is one of the processes of the central dogma which also includes transcription and translation process.
Explanation:
The associated enzymes for the translation process are RNA polymerase, helicase. The former enzymes add the nucleotides for the proteins to be synthesized. The product of transcription varies in both prokaryotic as well as eukaryotic cells. Protein folding, post-translational modifications, and proteolysis are the modifications that are carried out after transcription. These modifications allow an effective translation process so that the desired functions of the protein are carried out translation are RNA polymerase, helicase. The former enzymes add the nucleotides for the proteins to be synthesized. The product of transcription varies in both prokaryotic as well as eukaryotic cells. Ribosomes are the most important structure associated with this process. The process of translation is carried out in the cytoplasm because of the presence of ribosomes.
Protein folding, post-translational modifications, and proteolysis are the modifications that are carried out after transcription. These modifications allow an effective translation process so that the desired functions of the protein are carried out.
Enzymes are sensitive to pH and temperature. If an enzyme’s environment is too hot, the enzyme cannot
Temperature and pH levels have critical roles in enzyme activity; high temperatures and extreme pH levels can cause denaturation, affecting their ability to bind to substrates and catalyze reactions.
Explanation:Enzymes, which are biological catalysts, are highly sensitive to changes in temperature and pH. At high temperatures, the delicate balance of chemical bonds within the enzyme's active site is disrupted, leading to denaturation, which is an irreversible loss of structure and function. This process affects the enzyme's ability to bind to its substrate and catalyze reactions efficiently. Similarly, the pH level affects enzyme activity. Each enzyme is adapted to an optimal pH range, and exposure to extreme pH levels can also result in denaturation. For example, gastric protease requires an acidic environment to function but is inactivated in the alkaline medium of the small intestine to prevent damage.
each box inside a punnett square represents one ?
Answer: one genotype of the offsprings.
Explanation: A punnett square is a diagram used I'm predicting the possible genotypes of a cross between two organisms. Punnett square is used to predict the probability that an offspring will have a particular genotype. In punnett square, the parents' genotypes are written on the top and the left side of the square while the possible genotypes of their offsprings are written in the boxes.
A box in a Punnett square represents the possible genotype of offspring from a genetic cross, providing a visual tool for predicting genotypes and phenotypes according to Mendelian genetics.
Explanation:Each box inside a Punnett square represents one possible genotype of the offspring from the parents in a genetic cross. A Punnett square helps predict the ratio of different genotypes and phenotypes that their offspring may exhibit following the patterns of Mendelian inheritance. For example, consider two parents with heterozygous traits (Bb), the Punnett square would have four boxes, where one would show the dominant homozygote (BB), two would represent the heterozygotes (Bb), and one the recessive homozygote (bb). If we were to look at the probability of a dominant phenotype, we could calculate the likelihood using the boxes by recognizing that they are equally likely and mutually exclusive events. In this case, three out of the four boxes would result in the dominant phenotype, giving us a probability of 3/4 for the dominant phenotype among the offspring.
study the diagram below. where does oxygen first enter the bloodstream
Answer:
I think that b is correct.
PLS ANSWER FAST Describe the components used in the process of cellular respiration.
Answer:
Most of the steps of cellular respiration take place in the mitochondria. Oxygen and glucose are both reactants in the process of cellular respiration. The main product of cellular respiration is ATP; waste products include carbon dioxide and water
Explanation:
One major difference between members of domain eukarya and members of domain archea is that members of domain eukarya
0
are all single-celled, while members of archea are multi-celled.
have cell nucleuses, while members of archea do not.
are autotrophs, while members of archea are heterotrophs.
All of these choices are correct.
Answer:
have cell nuclei while members of archaea do not
Which of these is extinct?
a) Dodo bird b) Asiatic lion
c)Elephant d) Leopard
Answer:
A - dodo bird
Explanation:
Dodo bird : is an extinct flightless bird that was endemic to the island of Mauritius
Asiatic lion - is a panthera leo leo population in India
Elephant - are mammals of the family Elephantidae and the largest existing land animals
Leopard- is one of the five extant species in the genus panthera, a member of the folidae.
what is mulch and give two materials that can be used as mulch
Answer:
mulch isnt really something itsself, if that makes sense.
Explanation:
A variety of materials are used as mulch: Organic residues: grass clippings, leaves, hay, straw, kitchen scraps comfrey, shredded bark, whole bark nuggets, sawdust, shells, woodchips, shredded newspaper, cardboard, wool, animal manure, etc.
1. A stem cell in an animal divides by mitosis.
Which statement is true about the two daughter
cells?
A. They each have identical functions.
B. They each have the same DNA sequences.
C. They are the same size and shape as their paren
cell.
D. They each have half as many chromosomes as
their parent cell.
Can o please get help ASAP !!!
Describe two reasons why multiple sets of research on the same or related information is
important.
Answer:
When a research is conducted and results are deduced, scientists tend to perform the experiments again and again to check if the results are similar each time. These multiple set of research again and again is important to check and prove that our results are authentic.
Sometimes, it might happen that there might be some other external factor due to which the results are occurring as seen. Re-checking of the results s important so that it might be made sure that no external factor is the reason of the shown results.
In order to keep the soil fertile, farmers often change the crop that is grown in a field every two to three years. What is this process called?
A.
sharecropping
B.
crop conservation
C.
organic farming
D.
crop rotation
Answer:
Crop rotation
Explanation:
It is done so that the soil of farms is not used for only one set of nutrients. It helps in reducing soil erosion and increases soil fertility and crop yield.
what’s the difference between haploids and diploids
Answer:
diploids cells have two complete sets of chromosomes, this compared to haploid cells who only have one complete set of chromosomes.
Explanation:
Answer:
Explanation:
There are two main types of cells in the body which are the Haploid cells and diploid cells. These two cells are different based on the number chromosomes that the cell contains.
The differences between haploid and diploid cells
haploid cells contains only one set of complete chromosome(n) while Diploid cell contains two set of complete chromosome(2n).haploid cells reproduce by meiosis while diploid cells reproduce by mitosis.haploid cell have 23 chromosomes, while diploid cells have 46 chromosomes.The hydra reproduces by growing a new organism from the side of its tube
looking body . This is called
Answer:
Budding.
Explanation:
In budding, the offspring develops as an outgrowth of the parent. The bud may form on an external or an internal surface of the parents. Internal buds here are formed in some sponges, and are released when the parents die.
External buds which occurs in hydra and coral polyps. These buds break off from the parent without causing any injury and lead an independent life.
It is well noted that in multicellular animals like in the hydra, the cells in the bud undergo differentiation to form the complex body of the organism.
what would happen if our lungs where made up of only one big alveoli?
The process of respiration system would not function well if the lungs was made up of only one big alveoli.
Explanation:
The main role of alveoli is to help the lungs to breath, for ventilation, diffusion and perfusion. The process of respiration system would not function well if the lungs was made up of only one big alveoli.
Alveoli are tiny to help the flow of oxygen and carbon dioxide, it helps the oxygen flow into the lungs and remove the carbon dioxide. If the alveoli is just one and big, then it would be hard to flow the oxygen through lungs and remove the carbon dioxide.
Therefore, it is good to have many tiny alveoli than one big one or the rib cage that protect the lungs could go through some damages.
What three structures are unique to the plant cell?
Answer: Cell wall, chloroplasts, and a central vacuole are all structures that only plant cells have.
Hope this helped! :)
Chapter 23 Study Guide
23.1.1 What are the main tissue systems of plants?
What are the main tissue systems of plants?
Answer:
In plant anatomy, tissues are categorized broadly into three tissue systems: the epidermis, the ground tissue, and the vascular tissue. Epidermis - Cells forming the outer surface of the leaves and of the young plant body. Vascular tissue - The primary components of vascular tissue are the xylem and phloem.
The main tissue systems of plants are the dermal tissue system, the ground tissue system, and the vascular tissue system.
The dermal tissue system is the outermost layer of cells covering the plant's primary body. It includes the epidermis of leaves, young stems, and roots, and the periderm in woody stems and roots. Its primary functions are protection, control of water loss, and gas exchange.
The ground tissue system is composed of relatively unspecialized cells and is located between the dermal and vascular tissues. It is responsible for storage, photosynthesis, and support. Ground tissue includes parenchyma, collenchyma, and sclerenchyma cells.
The vascular tissue system is made up of complex tissues that transport water, nutrients, and photosynthetic products throughout the plant. It consists of xylem, which transports water and minerals from the roots to the rest of the plant, and phloem, which transports sugars and other metabolic products from the leaves to other parts of the plant.
Each of these tissue systems plays a crucial role in the structure and function of plants, contributing to their growth, development, and survival.