An essential material for photosynthesis is/are:
a. nitrogen
b. chlorophyll
c. chloroplasts
Answer:
B
Explanation:
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On the Galapagos Islands, Darwin observed tortoises with domed and saddle-shaped shells. How did Darwin's observations of these tortoises help him form the theory of evolution by natural selection?
Answer:
He realized that the tortoises shells changed to better suit the environment they were living in
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The purpose of the microvilli in the small intestine is to _______________. MULTIPLE CHOICE.
A. increase friction
B. propel chyme along the digestive tract
C. aid in locomotion
D. increase surface area
Answer: D. increase surface area
Explanation:
Microvilli are hairs that aid in absorption of nutrients. In the small intestine, these cells contain microvilli, which are tiny hair-like projections that increase nutrient absorption. These projections increase the surface area of the small intestine allowing more area for nutrients to be absorbed.Answer:
D
Explanation:
With more surface area food can be broken down faster
What do oestrogen and progesterone do in the menstrual cycle
Answer:
Oestrogen and progesterone in the control of the menstrual cycle. Progesterone maintains the uterus lining (the thickness of the uterus wall). If the egg has not been fertilised, the corpus luteum dies and progesterone levels drop. This causes menstruation, where the uterus lining breaks down - this is known as having a period.
Which of the following statements about human society and limiting factors is true?
Answer:
Modifications made to the environment to reduce the impact of limiting factors can cause disruption to the natural balance of an ecosystem
Explanation:
What type of plate boundary is illustrated in the image?
The type of plate boundary illustrated in the image is convergent boundary plates.
What is the convergent boundary?An area where two plates converge is referred to as a convergent border. The borders of one or both colliding plates may bow up into mountain ranges as a result of the impact, or one plate may bend down into a deep undersea trench.
Convergent boundary plates are the kind of plate border that is depicted in the image. The edges of a plate boundary are those of two plates that are either colliding, moving apart or meeting.
Activities like mountain-building, earthquakes, and volcanoes do happen at plate borders.
Therefore, the border where two plates are colliding is known as a convergence boundary.
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What is the best way to determine a species population in an area?
A. Subtract the carrying capacity from the original population.
B. Subtract those from those in the area from those in or arriving at the area.
C. Add up the sustainability in the area, and subtract the number of deaths.
D. Add up the animals that have been born recently
Paul Laurence Dunbar was born in Dayton, Ohio, in 1872, the son of two former slaves. When Dunbar was a young man, his mother encouraged him to read. He started reading, reciting, and writing poetry by the age of six. After receiving his education, Dunbar continued writing and worked as an elevator operator to help pay his bills. After publishing two poetry collections, Dunbar was well-known around the country. Today, many people still celebrate Dunbar's writing and honor his talent. Which of these is the BEST topic sentence for the composition? A) Paul Laurence Dunbar was a famous poet during the early 1900s in America. B) Many famous American writers and poets emerged during the early 1900s. C) Poets are creative people who help to change the places they live. D) A few well-known American poets lived during the early 1900s.
Answer:
The answers A.
Explanation:
Because the passage isn't talking about poets in general, it's specifically talking about Paul Lawrence Dunbar. So the topic sentence should have him as the main theme.
Which organisms does the mouse in the food web provide energy for?
a. deer and snake
b. hawk and coyote
c. grasshopper and snake
d. butterfly and hawk
Answer:
The answer is B.
Explanation:
In this food web, you can see that snake, coyote and hawk feed on mouse in order to get energy.
Use a Punnett Square to show the probability of 2 heterozygous Black Bears producing a Kermode Bear. Include the phenotype and genotype ratio and percentage of the offspring.
Answer: geno- 25%BB 50%Bb 25%bb
Pheno: black, kermode(white)
Explanation: the top of the punnett square should have Bb and the side should have Bb.
Square one should be BB square two should be Bb square three should be Bb and square 4 should be bb * note* the percentages should add up to 100 and use percentages of 25
What is a Genome? Where is it found? What does it contain?
Answer:
A genome is a complete set of dna(genetic information) and contains all of an organisms genes.It is found in the nucleus.
7. A type of cell division that results in diploid cells: [meiosis / mitosis
Answer:
Mitosis
Explanation:
Mitosis is a cell division process. The 2 cells created are exactly the same, and they have the same number of chromosomes. The result is two, identical, diploid daughter cells. Diploid means that there is 2 complete sets of chromosomes, and one complete set of chromosome pairs.
Meiosis is another cell division process, but the cells created are different from those in mitosis. There are 4 cells created, not just 2. Additionally, the cells produced are not identical. There is variation in the genetics of the daughter cells. This process creates haploid cells, meaning there is only 1 complete set of chromosomes, or half of a complete set.
Therefore, the cell division that results in diploid cells is mitosis.
The type of cell division that results in diploid cells is mitosis. Mitosis is a fundamental process in which a single cell divides into two identical daughter cells, each containing the same number of chromosomes as the parent cell.
The daughter cells produced through mitosis are genetically identical to each other and to the parent cell. Mitosis is involved in the growth, repair, and maintenance of tissues in multicellular organisms. It ensures that the body's cells retain the same genetic information and have the appropriate number of chromosomes (diploid) characteristic of the species. In contrast, meiosis is a specialized type of cell division that results in the formation of haploid cells, which have half the number of chromosomes as the parent cell.
Therefore, the type of cell division that results in diploid cells is mitosis.
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What happens if a cell in our body dies (replacement and repair)?
Answer:
If a cell in our body dies ( replacement and repair ) then it can cause individual cell death and if sufficient cells are lost, the result can be tissue or organ failure, ultimately leading to death of the organism.
Explanation:
Answer:
Cell Damage and Tissue Repair. Toxic damage to cells can cause individual cell death and if sufficient cells are lost, the result can be tissue or organ failure, ultimately leading to death of the organism. ... Physical agents such as heat and radiation may damage a cell by coagulating their contents (similar to cooking).
Explanation:
Which layer of Earth has the most influence on Earth's magnetic field?
Answer:
Earths inner core
Sorry, Hope this helps.
Explanation:
Summarize what the theme in biology show.
WILL MARK BRAINLIEST!! DON’T COPY FROM OTHERS MAKE YOUR OWN!!
Consider a melt that has cooled to a temperature such that olivine, pyroxene, amphibole, and calcium-rich plagioclase feldspar have crystallized. which elements will be enriched in the melt, and which will be depleted in the melt?
Answer:
Calcium is enriched, while they are depleted of carbon.
Explanation:
It should be understood that during the process of volcano eruption, carbon is liberated as the molten magma is coming out , this is due to the heat that is being evolved. And calcium will be the molecules that will make the molten solidified after wind has cooled it down.
That is why they are depleted of carbon, and enriched with calcium.
A random mating population has an established frequency of 64% for organisms that are homozygous recessive for a given trait. What is the frequency of this recessive allele in the gene pool? *
a. 0.8
b. 0.32
c. 0.6
d. 0.2
Could two parents with cleft-chin have a child without cleft-chin?
Answer:Cleft chins were believed to be a dominant trait: if two parents had cleft chins, their kids could have a cleft or might not But it turns out a cleft chin is too complicated to be simply dominant. Two parents without a cleft have kids with cleft chins way more often than predicted with this simple model.
Explanation:
Answer:
A
B
Explanation:
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Answer:
Molecules stop moving at freezing point. Helium has the lowest boiling point. The molecules move very quickly at boiling point.
Explanation:
Heating up- molecules move faster. Cooling down- molecules move slower
A gene mutation is a change in the sequence of nucleotides that occurs during cell replication (mitosis and meiosis) within a single coding section of DNA. Mistakes can also occur in the transcription of mRNA or the translation of a polypeptide. However, these changes are not considered to be mutations, because they are not permanent changes to the cell. Explain why "mistakes" in transcription or translation are not as serious as mutations in a gene.
Answer:
The cell has an elaborate mechanism in place that check for and correct the mistakes that happen during replication, transcription or translation. This process is called as proofreading. The incorrect nucleotide added during replication cause the replication to be halted for a while. The DNA polymerase enzyme fixes the error and replication then resumes as normal.
Gene mutation, on the other hand, is a permanent change in the DNA sequence that might lead to cancer.
Hope that answers the question, have a great day!
How do ocean currents affect temperature? Check all that apply
Answer:
Ocean currents are the continuous, predictable, directional movement of seawater driven by gravity, wind (Coriolis Effect), and water density. Ocean water moves in two directions: horizontally and vertically. Horizontal movements are referred to as currents, while vertical changes are called upwellings or downwellings.They carry cold water from the poles to the equator and cool air over land. They move warm water from the equator to the poles and heat air over land.
Explanation:
They carry cold water from the poles to the equator and cool air over land. They move warm water from the equator to the poles and heat air over land.
Answer:
They carry cold water from the poles to the equator and cool air over land.
They move warm water from the equator to the poles and heat air over land.
Explanation:
i just answered the question
100 POINTS! CORRECT ANSWER GETS BRAINLIEST! Study the image of chromosomes in a human cell. Do the chromosomes in this image belong to a female or a male? Autosomes and Sex Chromosomes You may have noticed in the image of chromosomes in a human cell that all of the chromosome sets are labeled with a number except one set, which is labeled with X and Y. Together, chromosome pairs 1 through 22 makes up your autosomes, which are chromosomes that contain genes for characteristics not directly related to the sex of an organism. Most sexually reproducing species also have sex chromosomes that directly control the development of sexual characteristics. Humans have two very different sex chromosomes: X and Y. In all mammals, including humans, an organism's sex is primarily determined by the XY system. An organism with two X chromosomes is female. An organism with one X and one Y chromosome is male.
Answer:
Male
Explanation:
how are the inorganic and organic fertilizers important in agriculture?
Answer:
It helps grow food and large amounts of it to feed the nation!
Explanation:
Fertilizer maintains the soil fertility, so the farmer can continue to grow nutritious crops and healthy crops. Farmers turn to fertilizers because these substances contain plant nutrients such as nitrogen, phosphorus, and potassium. Most farmers today use fertilizers that are either mined or manufactured.
Answer:
In addition to releasing nutrients, as organic fertilizers break down, they improve the structure of the soil and increase its ability to hold water and nutrients. Over time, organic fertilizers will make your soil–and plants–healthy and strong.
Explanation:
is flowering patterns independent or dependent
Answer:
The correct answer is dependent.
Explanation:
A variable whose variation does not rely upon that of another is known as the independent variable. An independent variable is modified or monitored within an experiment to examine the influence on the dependent variable. On the other hand, the variable that is being measured and examined within an experiment is termed as the dependent variable.
The flowering pattern is being considered as the dependent variable as the pattern of flowering relies upon the concentration of light exposed by the plant.
In probability, an outcome is a possible _____.
Explanation:
result of an experiment or trial
A student is observing a sample of pond water and provides the following description in her observations.“I see euglena and paramecium swimming around in the drop of water. A daphnia is feeding on a clump of algae. I see air bubbles around the small clump of algae.”Would you describe what the student saw as a community or an ecosystem? Explain what clue(s) helped you decide.
Answer:
The student is viewing a community.
Explanation:
As we can see in the question above, the student is visualizing a group of living beings of different species that share the same environment and that interact with each other. We call this type of situation a Community.
An ecosystem, on the other hand, would be the set of several communities, which is not presented in the question above.
What would happen if there were no condensation stage in the water cycle?
Answer:
Explanation:
The condensation stage is the one where water vapour gathers together into clouds (and when the clouds become heavy enough with vapour, release water as rain). So the first answer is that there would be no clouds. Without clouds, I foresee a few things happening: ... Clouds reflect sunlight and help cool the Earth.
BLANK transport moves substances from an area of high concentration to an area of low concentration.
Answer:
The answer is Diffusion .
Explanation:
Diffusion is a net movement of molecules from a region of high concentration to a region of low concentration down a concentration gradient.
Answer:
active transport moves substances from an area of low concentration to an area of high concentration.
Explanation:
ANSWER IS: active
What are resistant marine ridges or mounds that are composed primarily of biochemically deposited calcium carbonates?
Answer:
yea
Explanation: