Answer:
60%
Explanation:
In over 60 % of angiosperms, pollen grains are shed at this 2-celled stage tube cell orvegetative cell generative cell.
How are single-gene disease different from other types of disease?
Explanation:
Single gene disorders are among the most well-understood genetic disorders given their straightforward inheritance patterns (recessive or dominant) and relatively simple genetic etiology. Although the majority of these diseases are rare, in total, they affect millions of Americans. Some of the more common single-gene disorders include cystic fibrosis, hemochromatosis, Tay-Sachs, and sickle cell anemia.
Darwin and Wallace both observed greater species richness in the tropics than in Europe, but neither of them had a good explanation for why. One of the best-supported modern-day hypotheses to explain this pattern is that mutation rates are higher in the tropics than in temperate latitudes. Why would higher mutation rates lead to greater species richness
Answer:
Mutation shows the species energy relationships, tropics are more rich with energy as compared to the temperate europe.
Explanation:
The rate of species evolution is defined by the type of environment or the natural surroundings it lives in. Mutations Can affect organisms by making changes in their physical characteristics. Such can impact their DNA code and may even lead to death in many. The richness of species in the tropics is due to the more warmer and humid climates. They are suited to the development and germination of certain bacterias and have certain climatic phenomena.which lymphoid organs atrophies with age???????
a)Peyer patches
b)Thymus
c)Bone marrow
d)Spleen
answer plz (╯︵╰,)
does anyone know how to do this?
What is the substance called at the top of the test tube after using
this centrifuge machine?
Answer:
supernatant
Explanation:
Mendel found that crossing wrinkle-seeded plants with pure round-seeded plants produced only round-seeded
plants.
Part A
Which trait is dominant?
A Round
B Wrinkled
C Peas
D Mendel
Answer:
round is the dominant triat
What is a chromosome and what is its relationship to DNA?
Answer:
hi
Explanation:
A scientist recently discovered a brand new organism. The organism is multicellular, is eukaryotic, and is a heterotroph Which kingdom may this organism belong to?
Kingdom Archaebacteria
0 Kingdom Animalia
O Kingdom Plantae
O Kingdom Eubacteria
Answer:
Kingdom Animalia
Explanation:
Being a eukaryote will eliminate Kingdom Archaebacteria and Kingdom Eubacteria, since those are bacteria and prokaryotes. Being a heterotroph (break down complex organic structures for nutrition) will eliminate Kingdom Plantae, since plants are autotrophs (makes nutritional organic substances from inorganic substances-the process of photosynthesis). Therefore the answer is Kingdom Animalia
Answer:
Kingdom Animalia
Explanation:
I got it correct
Examine a world map. What large patterns and structures do you see?
Plz answer this test ASAP
The cardiovascular system is composed of two circulatory paths: pulmonary circulation and systemic circulation.
Pulmonary circulation transports deoxygenated blood from the right side of the heart to the
A. left side of the heart where it is pumped to the lungs for oxygenation
B. lungs where blood picks up oxygen and returns to the left side of the heart
C. lungs where blood picks up oxygen and returns to the right side of the heart
D. lungs where the blood picks up oxygen and transports it to the tissues of the body
Answer:
B. lungs where blood picks up oxygen and returns to the left side of the heart.
Explanation:
In Human anatomy, cardiac cycle can be defined as a complete heartbeat of the human heart which comprises of sequential alternating contraction and relaxation of the atria and ventricles, therefore causing blood to flow unidirectionally (one direction) throughout the human body.
Generally, the cardiac cycle occurs in two (2) stages;
1. Diastole : in this stage, the ventricles is relaxed and would be filled with blood.
2. Systole: at this stage, the muscles contracts and thus, allow blood to be pushed through the atria.
The cardiovascular system comprises of two circulatory paths:
I. Pulmonary circulation.
II. Systemic circulation.
Pulmonary circulation transports deoxygenated blood from the right side of the heart to the lungs where blood picks up oxygen and returns to the left side of the heart.
The pulmonary circulation loop is mainly supported (powered) by the right atrium and right ventricle.
Additionally, the right atrioventricular valve (AV) also referred to as the tricuspid valve is located on the right dorsal side of the human heart. The right atrioventricular valve (AV) comprises of three (3) leaflets (flaps) which opens and closes in order to allow for the flow of blood from the right atrium of the human heart to the right ventricle. Also, the right atrioventricular valve is saddled with the responsibility of preventing blood from flowing backward in the mammalian heart.
Analyzing the following tree, prove the relationship between ray-finned fish and crocodiles using the characteristics given below. Include at least three (3) characteristics that the organisms DO NOT have in common and one characteristic that they DO have in common. Your paragraph should be at least four (4) sentences. Remember to answer in COMPLETE sentences and use proper grammar.
Answer:
The Ray- Finned Fish has a bony skeleton just like crocodiles. Crocodiles evolved more and adapted to their environment. Along the way Crocodiles grew to have four limbs, were born from an amniotic egg, and then their eggs also have shells, unlike the Ray-finned fish. Therefore the three characteristics they do NOT have in common are: Four Limbs, Amniotic Egg, and Eggs with Shells. The one trait they do have in common is Bony Skeletons. They also both have vertebrae.
Describing the path of a water molecule through a convection current
Answer:
When we heat a container full of water, the water in the lower part of the container i.e. near the flame gets heated first. Warm water rises up and the cold water rushes below to take its place. This water again gets heated and rises up and the cycle continues.
Scientists studying the passage of genetic materials of the T2 bacteria phage during infection prepared two batches of phages. Batch I is prepared in the presence of 35S. Batch II is prepared in the presence of 32P. Scientists used the two batches of phages to infect bacteria grown in medium that did not contain 35S or 32P, and then isolated the progenies.What proportions of the progenies of Batch I and Batch II phages would be labeled
Answer:
Progenies of batch I would not be labeled by 35S; progenies of batch II would be labeled by 32P.
Explanation:
2. Why is the cell cycle important?
A. O it enables organisms to grow, develop, and maintain healthy cell tissue
B. O it causes fertilization of eggs, enabling sexual reproduction
C. O it regulates the use of nutrients and energy by organisms
D. O it determines the fate of undifferentiated stem cells in organisms
Explanation:
The cell cycle is the replication and reproduction of cells, whether in eukaryotes or prokaryotes. It is important to organisms in different ways, but overall it allows them to survive. ... Plants require the cell cycle to grow and provide life for every other organism on earth.
When completing this exercise, it may be useful to refer back to Labs 10-12 for information about living primates. In 2009, a new fossil species, called Darwinius masillae, was identified in Germany, represented by a nearly complete skeleton nicknamed Ida (depicted on p. 387 of your lab manual). It lived around 47 mya. It had a small brain, short protruding snout, large eyes, and postorbital bar. Its diet probably included a lot of fruit and leaves. It did not have a dental comb. It had nails instead of claws and was probably an arboreal quadruped. Researchers disagree about whether the fossil is more similar to living haplorhines (tarsiers, monkeys, and apes) or more similar to strepsirhines (lemurs and lorises). The skeleton is about 23 inches (58 cm) long including the tail, and has a body length of about 9 inches (24 cm) without the tail. Describe at least two features that Darwinius shares with living haplorhines.
Answer:
short protruding snoutlarge eyesIt had nails instead of clawsAbsence of dental combLong tailExplanation:
Haplorhines and Ida share the following characteristics:
- Both of them have plane nails in their fingers instead of claws. Nails are useful while eating and grooming. They might be necessary for defense too.
- They have a short snout, which is the cause of a poorly specialized olfactive perception.
- Neither of them has the dental comb characteristic of strepsirrhines.
- Eyes are big, located in the frontal area of the skull, and facing front. Vision sense is very developed. They have binocular vision, which allows them to calculate distances.
- The long tail is shared by both groups. Used during motion, to equilibrate, to hold, or grab.
Which best describes a method of obtaining energy that may cause changes in
water temperature and harm to fish populations?
A burning coal
B using ethanol in cars
C installing solar panels on a home
D generating electricity in a hydroelectric power plant
Group of answer choices
Answer:
D. generating electricity in a hydroelectric power plant.
Explanation:
Renewable energy is also known as clean energy and it can be defined as a type of energy that are generated through natural sources or technology-based processes that are replenished constantly. Some examples of these natural sources are water (hydropower), wind (wind energy), sun (solar power), geothermal, biomass, waves etc.
Basically, a renewable energy source is sustainable and as such can not be exhausted.
Generating electricity in a hydroelectric power plant best describes a method of obtaining energy which may cause changes in water temperature and harm to fish populations. This is due to the operation of powerful electric steam turbines operating at high voltage.
Explain how cladograms shows relationships between organisms.
Answer:
A cladogram is a diagram used to represent a hypothetical relationship between groups of animals called a phylogeny. a cladogram is used by scientists studying phylogenetic systematics to visualize the groups of organisms being compared, how they related, and the most common ancestors.
Explanation:
Hope this helped Mark BRAINLEST!!!!
Which sequence of events best describes the current theory of the origin of life on Earth?
RNA formation→DNA formation→Development of simple bacteria
Development of simple bacteria→DNA formation→RNA formation
DNA formation→RNA formation→Development of simple bacteria
Development of simple bacteria→RNA formation→DNA formation
Answer:
The correct answer is - Development of simple bacteria→RNA formation→DNA formation
Explanation:
According to the hypothesis and researchers, it seems to confirm that RNA was the first genetic or hereditary material that was present in the simple form of bacteria developed first.
RNA is the molecule responsible for the origin of life on the earth and evolved all the required processes and methods for carrying and expressing the genetic information of an organism before DNA. DNA is evolved from RNA molecules of simple bacteria.
The lac operon controls the transcription of a group of genes involved in metabolizing lactose in E. coli. A group of scientists tested how to activate the lac operon. In four different mediums, they varied whether glucose or lactose was present in the medium, as indicated by a or -.The scientist discovered that the lac operon is inducible, repressed by glucose and induced by allolactose. Which medium has the right conditions to metabolize lactose
Answer:
The correct answer would be - medium with lactose present and glucose absent.
Explanation:
There are genes present in lac operon that takes part in the lactose metabolism. These genes expressed only if a medium has lactose in absence of glucose.
In the absence of glucose and lactose is present, due to inducer the lac repressor is removed from the operator. This leads to the binding of CAMP to DNA as the CAMP levels are high. It helps in high transcription levels b binding RNA polymerase to promotor.
Can someone pplease help me ASAP please
Answer:
Phosphate Group
Explanation:
What hormone helps plants move toward a stimulus?
O Ethylene
O Auxins
O Acids
O Cytokines
Answer:
cytokines
Explanation:
hope it helps
A Shut the water off except during lunch time.
B Take out all classroom faucets
C Fix the leaks in the faucets, water fountains, and toilets.
D Shut water off during the weekend while school is not in session.
What was the most important gas contributed by stromatolites?
a. carbon dioxide
b. nitrogen
c. ammonia
d. oxygen
Oxygen was the most important gas contributed by stromatolites. Thus, the correct option is D.
What are Stromatolites?Stromatolites may be defined as rock or microbial reefs that are formed by cyanobacteria (blue-green algae).
Stromatolites are responsible for the oxygenation of the atmosphere. Blue-green algae fed off carbon dioxide and convert it into the marine sediments known as Stromatolites.
Therefore, the correct option for this question is D.
To learn more about Stromatolites, refer to the link:
https://brainly.com/question/1001123
#SPJ2
Answer:
I hope this helps.
Explanation:
3) Which of the following statements about independent assortment and segregation is correct?
A) The law of independent assortment requires describing two or more genes relative to one
another
B) The law of segregation requires describing two or more genes relative to one another.
C) The law of independent assortment is accounted for by observations of prophase I.
D) The law of segregation is accounted for by anaphase of mitosis.
Answer:
im pretty sure c but not sure
Explanation:
The independent assortment is one that describes how different genes independently get separated from one another. This process takes place during the development of the reproductive cells.
During mitosis, the parts of the chromosome are divided into haploids. Thereby separating the assortment. The example of pea-shaped genes is a law of independent assortment and segregation.Hence the law of assortment needs describing two or more genes relatively to one another.Thus option A is correct.
Learn more about the statements about independent assortment and segregation.
brainly.com/question/22241632.
Scientists recently published a paper about an endangered population of Scarlet Bass (species A) in Lake Erie. The authors also published its entire mitochondrial DNA sequence on Genbank, an online system where scientists submit genomic data. Another group of scientists later published an article using molecular data to estimate gene flow among populations of the very abundant Grey Bass species (species B) in Lake Erie, and published mitochondrial data on Genbank as well. After you read the papers you realize that the ranges for species A and a few isolated populations of species B overlap; you look at the sequence data published online from both studies, and you realize they are very similar and differ only by a few nucleotide differences. 8. Do you think these are closely related species, or variants of the same species
Answer:
They are variants
Explanation:
The biological concept of species states that members of the same species can reproduce they have a genetic reservoir in common: many genetic variants.
Genetic variability is the measure of a species organism´s tendency to differentiate. In genetic variability, individuals of the same species are not identical. They are recognizable as members of the same species, but they differ in shape, function, and behavior. There exist variations among individuals of the same species.
Genetic variability originates from mutations, recombinations, and karyotype alterations. It allows or makes possible evolution.
Groups A and B can be considered variations of the same species. They not only overlap but also share most of the genetic sequences with only a few nucleotide differences.
These variations might be the previous step for sympatric speciation.
Which statement is true based on the data in the table?
A. The United States uses more land to grow crops than to maintain forests
B. The United States uses more land for parks and wildlife than for forests
C. The United States uses more land for parks and forests than for urban areas.
D. The United States uses more land for urban areas than for grasslands and ranges
Answer:
C. The United States uses more land for parks and forests than for urban areas.
Explanation:
According to the given data, the size of land used for parks and forests in United States is 313 million acres. The land used for urban areas is 61 million acres. This data here presents a comparative detail of the size of land and the purpose it is used for.
The maximum land used by United States is for forest area and grass range. This depicts that more stress is levied on keeping the land green.
Answer:
C.
Explanation:
Person above is right.
11. Liquid methane has a heat of vaporization of 122 calories per gram (cal/g). Compare the
effectiveness of liquid methane and water for evaporative cooling.
Answer:
Water is more effective for evaporative cooling than liquid methane since, it would result in a higher temperature drop for the same mass of liquid methane.
Explanation:
Since the heat of vaporization of water is 540 calories per gram and that of liquid methane is 122 calories per gram, for each gram of the water evaporated, 540 calories is lost while for each gram of liquid methane evaporated, 122 calories is lost.
Since a higher heat loss would result in a higher temperature drop, water is more effective for evaporative cooling than liquid methane since, it would result in a higher temperature drop for the same mass of liquid methane.
10. The Northeast region of the US is working on harnessing tidal power.
A. true
B. false
Answer:
I think false is your answer ☺️☺️. If I'm right so,
Please mark me as brainliest. thanks!!!
Answer:
true
Explanation:
22)
The Master answered, "Never fail to comply."
Fan Ch'ih was driving. The Master told him about the interview, saying, "Meng-sun asked me about being filial. I answered,
"Never fail to comply."
Fan Ch'in asked, What does that mean?
The Master said, When your parents are alive, comply with the rites in serving them; when they die, comply with the rites in
burying them; comply with the rites in sacrificing to them.'
Analects II, 5
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Which principle of Confucianism does this support?
A)
Virtue
B)
Social Order
Mandate of Heaven
D)
Ancestor Veneration
23)
The start of the Korean War in 195
Answer:
D
Explanation:
Relate Cause and Effect Suppose all the alleles on the left and right
chromosomes switched places but kept the same order. Would the
organism be different? Why or why not?
Type your answer here!
Answer:
no i think because chromosomes are remaining same i m 1n 8 th so dont know much but got 17th place in biology competetion
Explanation: