The homo-logous mitochondrial sequences CTGTCCGAAG and CTGTCCGTCG suggest that species diverge from a common ancestor 660,000 years ago.
What is the mutation rate?The mutation rate indicates the number of nucleotide differences between two homo-logous sequences that emerged in evolution in a given period of time.
In this case, the mutation rate is one nucleotide per 330,000 years and here we have two mutations (CTGTCCGAAG and CTGTCCGTCG), thereby it is expected that the sequences diverged 660,000 years ago.
In conclusion, the homo-logous mitochondrial sequences CTGTCCGAAG and CTGTCCGTCG suggest that species diverge from a common ancestor 660,000 years ago.
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Beneficial micro-organisms that are responsible for breaking down organic matter are called?.
What are the defining characteristics of lobe-finned fishes?
Lobe-finned fishes are characterized by lobes in their fins in addition to the basic characteristics of fishes.
What are lobe-finned fishes?Lobe-finned fishes are a group of fish known as Sarcopterygii. They possess the basic characteristics of fishes such as swim bladder, lateral lines, etc.
They are a sister group of ray-finned fishes. In addition, lobe-finned fishes possess the following characteristics:
lobed finsenameled teethMore on lobe-finned fishes can be found here: https://brainly.com/question/7849168
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the enzyme pgh synthase contains two different functionalities, a __________ that uses two molecules of oxygen as substrates and __________ which performs a 2 electron reduction.
The enzyme PGH synthase contains two different functionalities, a cyclooxygenase that uses two molecules of oxygen as substrates and peroxidase.
What is PGH synthase?Prostaglandin-endop_eroxide synthase 2 (PGH) is an enzyme that has catalytic activity as peroxidase.
A peroxidase enzyme is a catalyst that converts peroxide which is very reactive to oxygen and water.
In conclusion, the enzyme PGH synthase contains two different functionalities, a cyclooxygenase that uses two molecules of oxygen as substrates and peroxidase.
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Question 11 of 30
Which of the following factors affecting population growth is density
independent?
Answer:Density-independent limiting factors affect all populations the same, regardless of population size. Density-dependent limiting factors include disease, parasites, competition for food, water, and shelter, and predation. Density-independent limiting factors include natural disasters, climate, and human activity.
Explanation:
8. if a chemist calculates the maximum amount of product that could be obtained in a chemical reaction, he or she is calculating the
a. percentage yield.
b. mole ratio.
c. theoretical yield.
d. actual yield.
Answer:
they are calculating the theoretical yield
What are the products of Anaerobic Respiration in yeast?
The products of anaerobic respiration in yeast are carbon dioxide and ethanol.
Anaerobic respirationThis refers to respiration in the absence of oxygen.
In the absence of oxygen, both the citric acid cycle and the electron transport chain cannot proceed. Thus, only glycolysis takes place.
The two pyruvate molecules produced in anaerobic respiration in yeast are converted to ethanol, instead.
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What form of natural selection does the histogram show?
disruptive selection
sexual selection
directional selection
stabilizing selection
The form of natural selection does the histogram show is disruptive selection.
What is a disruptive choice on a graph?In disruptive choice, choice pressures act on people withinside the center of the trait distribution. The end result is a bimodal, or -peaked, curve wherein the 2 extremes of the curve create their personal smaller curves.
Disruptive choice produces a populace that has severe variations of a trait because the dominant phenotype. For example, if each brief and tall organisms, however now no longer medium top organisms have been preferred this will be disruptive choice in action.
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Which is an abiotic factor that can be found in a rain forest ecosystem?
OA. Water
OB. Trees
O C. Animals
D. Bacteria
Answer:
I think Trees because abiotic means stuff that doesn't live so yea
let me know if i am wrong.
Explanation:
A botanist scrapes pollen off of one plant and then use it to pollinate the flower of another plant . What can scientifically conclude about other offspring
A botanist scrapes pollen off a flower of one plant and then uses it to pollinate the flower of another plant. What can be scientifically concluded about their offspring?
A. They will have a large amount of genetic variation.
B. They will have twice the number of chromosomes as their parents.
C. They will be genetically distinct from their parents.
D. They will be able to reproduce only asexually.
Plants' xenogamous system has high probabilities of introducing genetic variation between plants. Option A) They will have a large amount of genetic variation.
What are the crossing systems in plants?There are two general crossing systems in plants, which depend on pollination type.
Self-pollination occurs when the flower pollen is transferred to the same flower stigma, reaching that individual egg to fertilize it. These are autogamous systems. Crossed pollination occurs when the mature pollen is driven by different pollinator agents from one flower to another, reaching the other flower stigma and fertilizing its eggs. These are xenogamous systems.
Sexual reproduction gives more possibilities to different alleles of a gene that did not appear in one generation to express in the next generation.
Both types of pollination allow genetic variation, however by the occurrence of crossed pollination there are more chances to ensure the variability of the species and survival to environmental changes.
While by self-pollination there are more chances to express the same genotype of the parental plant.
The Xenogamous system has the advantage of avoiding the effects of endogamy in a population by increasing genetic variability.
In the exposed example, the botanist is acting as the pollinator agent, allowing one plant's pollen grain to fertilize the egg of the other plant.
The merging of these gametes will introduce variation since there will new allelic combinations.
The correct option is A). They will have a large amount of genetic variation.
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How did different skin colors evolve in humans?
Skin colors evolve in humans as an adaptive feature to the amount of solar radiation in a given latitude.
What is adaptation?Adaptation is a given phenotypic feature that confers an advantage to the individual in particular environmental conditions.
Apadtations are selected by natural selection, which means that they exhibit differential survival and/or reproduction rates.
In conclusion, skin colors evolve in humans as an adaptive feature to the amount of solar radiation in a given latitude.
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I contain most of the cell that perform photosynthesis. who am I?
Answer:
chlorophyll
Explanation:
What does integrin do?
Integrin acts as transmembrane linkers and mediates the interactions between the cytoskeleton and the extracellular matrix.
What is Integrin?
They are proteins which possesses catalytic and structural functions in the body of organisms.
This is done through their ability to regulate different reactions which occur in cells.
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What makes up muscle tissue?
organisms
organ system's
organs
O cells
Answer:
Cells
Explanation:
The basic unit of living things is cells , some cells make up tissues , tissues make organs and organs make organ system , in a normal human (organism) there are 11 organs .
PLEASE GIVE BRAINLIEST
which statement accurately compares the tundra and the desert
Answer:
C is the correct answer
Explanation:
C
In a certain population of rabbits, the allele for brown fur is dominant over the
allele for white fur. If 20 out of 100 rabbits have white fur, what is the allele
frequency for the dominant allele?
Place the following statements in the correct order in the blanks below to describe how gas
exchange occurs in the leaf. Make sure you include how the gas enters, and how it exits
the leaf. Some statements may be used more than once.
a. Diffuses into air pockets
b. Diffuses into palisade cells
c. CO2(g) is converted into O2(g)
d. Diffuses through spongy tissue layer
e. Moves through open stomata
____ ____ ____ ____ ____ ____ ____ ____ ____
The correct order in the blanks is as follows E D C E A B A C E
Moves through open stomata diffuses through spongy tissue layer CO2(g) is converted into O2(g). Moves through open stomata diffuses into air pockets and diffuses into palisade cells. Diffuses into air pockets CO2(g) is converted into O2(g) moves through open stomata.
What is photosynthesis?
Plants use sunlight, water, and carbon dioxide to produce oxygen and energy in the form of sugar in a process known as photosynthesis.
When performing photosynthesis, plants utilize the ambient carbon dioxide and release the oxygen gas they create into the atmosphere. Gas exchange is the term for this. Stomata, a unique part of the plant's leaf, are used to accomplish this. The guard cells that surround the stomata become turgid or flaccid in response to the entry or escape of water molecules, respectively. Stomata open and gas exchange occurs when the guard cells become turgid, or the other way around.
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what is the largest bone in the human body?
Answer:
Femur bone
Explanation:
Answer is femur bone
What is the pressure in mm hg of a 0.025 mole sample of co2 at 350 k in a 2.00 l container? report your answer to the nearest mm hg
The pressure in mmHg of a 0.025 mole sample of CO2 at 350 k in a 2.00L container is 273.6 mmHg.
How to calculate pressure?The pressure of a gas can be calculated using the following expression:
PV = nRT
Where;
P = pressureV = volumen = number of molesR = gas law constantT = temperatureP × 2 = 0.025 × 0.0821 × 350
2P = 0.72
P = 0.72/2 = 0.36atm
Therefore, the pressure in mmHg of a 0.025 mole sample of CO2 at 350 k in a 2.00L container is 273.6 mmHg.
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which structure is most likely found in green plants
what are haploid and diploid cells?
Answer:
Explanation:
Haploid Cells
Haploid cells contain only one set of chromosomes. Gametes or sex cells are the most common type of haploid cells. They are produced by meiosis and are genetically diverse. When the haploid cells from male and female fuse together during fertilization, it forms a diploid cell.
Diploid Cells
These cells have two sets of chromosomes. It is formed by the fusion of two haploid cells. Most mammals are diploid, i.e., they have two homologous copies of each chromosome in the cells. They are produced by mitosis. The somatic cells in humans are diploid cells.
Which of the following describes a limiting factor of population size?
A. Birth rate
B. Death rate
C. Gestation
D. Water availability
Which trait is most likely to be selected in the population of plants growing in this region of the desert?
The ability to limit water transport and to conserve it is the feature most likely to be chosen in the plants growing in the desert.
Since the plants in desert regions are tiny, have deep roots, and have a thick, which also helps to keep the plants cool and slows evaporation, they lose less water and are more effective in hot temperatures like deserts. Animals cannot consume the majority of desert plants because they have. As a result of cactus and aloe vera flourishing in this area of the desert, The flora is frequently seen in deserts.
So The ability to limit water transport and to conserve it is the feature most likely to be chosen in the plants growing in the desert
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Which of these is a negative form of a plant tropism?
Answer:
Gravitropism is a common example which can be used to describe negative tropism.
Gravitropism is an example.
When a plant grows upwards and is defying gravity.
Therefore, it is negative gravitropism.
Question 7: What conclusions can you make about how a change in the condition of the ocean affects the different species in coral reefs?
Directions: List 5 examples for each type of change to matter.
Physical Change - The identity does not change (formula)
Chemical Change - The identity does change (formula)
i will give brainliest again, thanky ou for your help!
Answer:
Physical Change:
- Boiling water
- Breaking a pencil
- Water evaporating
- Denting a car door in an accident
- Tearing paper
- Ice melting
- dissolving
Chemical Change:
- Something rusting
- photosynthesis
- metabolism/digestion
- Nuclear power [atoms are arranged differently]
- Smashing paper with two metal balls, burns paper
- Electricity in water, breaks H2O into H2 and O2
-----
physical change is when there is only physical change occurring--and it can typically be undone easily,
whereas chemical change is when there is chemical change--which changes the chemical properties of something, which cannot be undone simply.
hope this helps!!
Answer:
physical [The identity does not change]
1. tear paper
2. submerge in water
3. eat [chewing] food
4. cutting hair
5. closing lid
chemical [The identity does change]
1. digest food
2. acid [corrosion]
3. rust
4. burning paper
5. baking
Eukaryotes such as animal and plants cells differ from prokaryotes in that prokaryotes.
Eukaryotes such as animal and plant cells differ from prokaryotes in that prokaryotes do not have either organelles or cell nuclei.
What are prokaryotes?Prokaryotes are microorganisms characterized due they do not have organelles or cell nuclei.
Conversely, eukaryotes contain their genetic material compartmentalized into a cell nucleus.
In conclusion, Eukaryotes such as animal and plant cells differ from prokaryotes in that prokaryotes do not have either organelles or cell nuclei.
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based on sex assigned at birth, women tend to reach higher bac levels more quickly than men because:
Women tend to reach higher bac levels more quickly than men because they have lower levels of the enzyme alcohol dehydrogenase.
What is BAC levels?BAC levels refers to the blood alcohol levels.
Women tend to reach higher BAC levels than men.
The enzyme alcohol dehydrogenase is responsible for the metabolism of alcohol.
Women generally have lower levels of the enzyme in their body and thus metabolize alcohol more slowly.
Thus, women reach higher BAC levels than men.
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What do plants need to survive and reproduce
It is very important that plants gets the right amount of basic needs to survive and reproduce. This is essential to humans as their main source of food is from plant.
Plants needs light, air, water, nutrients, and space to survive and reproduce. Plants gets their source of light from the sun, they use this light energy to produce glucose in the leaf.
Plants obtain air from the atmosphere, they derive water and nutrients from the soil to enhance their growth.
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EASYYYY I WILL MARK BRAINLY
Worldwide, what percentage of human water usage is the result of agricultural activity? What are some of the ways water is used in industry?
Answer:
70% fresh water is used for agriculture According to the United States Geological Survey (USGS), industrial water is used for fabricating, processing, washing, diluting, cooling, or transporting a product. Water is also used by smelting facilities, petroleum refineries, and industries producing chemical products, food, and paper products.
Answer:
In most regions of the world, over 70 percent of freshwater is used for agriculture. By 2050, feeding a planet of 9 billion people will require an estimated 50 percent increase in agricultural production and a 15 percent increase in water withdrawals.
Explanation:
Water is a critical input for agricultural production and plays an important role in food security. Irrigated agriculture represents 20 percent of the total cultivated land and contributes 40 percent of the total food produced worldwide.
heyy
please help me with these answers
theyre quite simple but i dont really know how to explain the answers
1. Tulips are pollinated by insects. explain three ways the flower is adapted for this type of pollination
2. explain the differences in the types of pollen produced by insect-pollinated amd wind-pollinated plants.
thankss
1. Bees, flies, wasps, butterflies, and moths are significant insect pollinators. Moths are drawn to white flowers that are open at night, but bees and butterflies are drawn to brilliantly colored blooms with powerful scents that are open during the day.
What is pollination?The act of moving pollen grains from an anther to a flower's stigma is called pollination. Flowers that are pollinated by insects typically generate a sweet nectar that the insects visit to consume. If a flower is self-pollinating, fertilization occurs when pollen stock from an insect contacts the stigma of the bloom. If the bug is bisexual, it will fly to another bloom and disperse the pollen.
2. Most flowers advertise themselves by being brightly colored and perched on long stems so they wave in the air and are closer to where insects are flying, as opposed to on the ground, where they would otherwise be. A flower's petal sizes and shapes, in addition to color, can draw insects.
3. Flowers draw insects because of their aroma or vibrantly colored petals. Nectar is a delicious liquid that many flowers generate that is consumed by insects. The female part of the flower is the carpel.
Answer 2. Flowers that are pollinated by insects have characteristics that enable insects, birds, or other animals to pollinate them while consuming the nectar. When an insect brushes by the stigma of a flower, whether it is the same bloom or another, pollen grains will adhere to the insect's outer layer and stick to the flower's stigma, pollinating the flower. When the two seˣ cells combine, fertilization occurs, the ovule develops into a seed, and the ovary becomes a fruit. The pollen grain then grows a pollen tube down the style to reach the ovary, which contains the ovules.
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