Which of the following is true about temperate forests?
They receive little rain throughout the year.
The temperate forest experiences seasonal changes.
The temperate deciduous forest has cold summers and warm winters.
They are barren and have few trees.
Answer:
Temperate forests typically have winters that often reach below freezing, however even this is not always true. The East Coast forests retain their deciduous nature largely due to the excessive freezing days each winter, as the leaves often freeze over and are only designed to live for one season.
The true statement about temperate forests is : The temperate forest experiences seasonal changes ( B )
The temperate forest regions experiences a high level of rainfall and humidity, it is characterized with a variety of trees ( deciduous ) whom shed their leaves during winter due to the decrease in rainfall and sunlight during winter season.
The shedding of leaves during the winter and the blossom of trees during summer shows that the forest experiences seasonal changes .
Hence we can conclude that the true statement about temperate forest is that the forest experiences seasonal changes.
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The kernel color in wheat is a continuous trait determined by two additive genes, each with two alleles, that equally contribute to kernel color determination. The red kernels are determined by two genes and two dominant alleles (R1R1R2R2), and white kernels are determined by two recessive alleles at the same two genes (r1r1r2r2). The duplicate dominant alleles R1 and R2 contribute equally to kernel color and cumulatively control the intensity of the red kernel phenotype. Both these alleles are dominant over the recessive white alleles r1 and r2.
1. A true breeding red plant and true breeding white plant are crossed, and the resulting F1 progeny are selfed. What is the expected phenotypic ratio of the kernel progeny of the F2 offspring?
a. 1:46:4:1.
b. 3:1
c. 9:3:3:1.
d. 27:9:9:9:3:3:3.
2. Determine which statement best describes the relationship between the phenotypes of the R1R1 R2r2 and R1r1 R2R2 genotypes.
A. The phenotype of the R1R1 R2r2 will be darker than the phenotype of R1r1 R2R2 because the alleles R1R1 R2r2 Rn have a stronger additive effect than those in R1r1 R2R2.
B. There is no way to predict the expected phenotype color from the genotypes because the trait is continuous and indiscrete.
C. The phenotypes of the R1R1 R2r2 and R1r1 R2R2 genotypes will be the same because the same number of dominant and recessive alleles are contributing in each genotype.
D. The genotype of the R1R1 R2r2 will be lighter than the phenotype of R1r1 R2R2 because the alleles R1R1 R2r2 have a stronger additive effect than those in R1r1 R2R2.
Answer:
1) Phenotypic ratio= 9:3:3:1
2) The correct statement is C. The phenotypes of the R1R1 R2r2 and R1r1 R2R2 genotypes will be the same because the same number of dominant and recessive alleles are contributing to each genotype.
Explanation:
Available data:
kernel color in wheat is a continuous trait determined by two additive genesBoth genes equally contribute to kernel color determinationRed kernels are determined by two genes and two dominant alleles (R1R1R2R2)White kernels are determined by two recessive alleles at the same two genes (r1r1r2r2)Dominant alleles R1 and R2 contribute equally to kernel color and cumulatively control the intensity of the red kernel phenotypeR1 and R2 are dominant over r1 and r21)
1st cross: A true-breeding red plant with true-breeding white plant
Parentals) R1R1R2R2 x r1r1r2r2
F1) 100% of the progeny will be R1r1 R2r2
2nd cross: Between two dihybrids
Parentals) R1r1R2r2 x R1r1R2r2
Phenotype) Red Red
Gametes) R1R2, R1r2, r1R2, r1r2
R1R2, R1r2, r1R2, r1r2
By using the forked-line method:
1/4 R1R1 x 1/4 R2R2 = 1/16 R1R1 R2R21/4 R1R1 x 2/4 R2r2 = 2/16 R1R1 R2r21/4 R1R1 x 1/4 r2r2 = 1/16 R1R1 r2r22/4 R1r1 x 1/4 R2R2 = 2/16 R1r1 R2R22/4 R1r1 x 2/4 R2r2 = 4/16 R1r1 R2r22/4 R1r1 x 1/4 r2r2 = 2/16 R1r1 r2r21/4 r1r1 x 1/4 R2R2 = 1/16 r1r1 R2R21/4 r1r1 x 2/4 R2r2 = 2/16 r1r1 R2r21/4 r1r1 x 1/4 r2r2 = 1/16 r1r1 r2r2F2)
9/16 R1 - R2-, red phenotype3/16 R1- r2r23/16 r1r1 R2-1/16 r1r1 r2r2, White phenotypeNote: The "-" symbol represents either a dominant or a recessive allele.
Phenotypic ratio: 9:3:3:1
2)
We know that both dominant alleles R1 and R2 contribute equally to kernel color and cumulatively control the intensity of the red kernel phenotype.
Genotypes R1R1 R2r2 and R1r1 R2R2 are carrying the same amount of dominant alleles, all of them are contributing equally to the phenotype, meaning that the cumulative effect is the same in both cases.
If we compare, for instance, R1R1 R2r2 and R1R1 r2r2, we can assume that the first genotype is darker than the second one, because it has 3 dominant alleles ( R1, R1, R2), while the second one only has 2 dominant alleles ( R1, R1).
Dominant alleles contribute equally, but they have cumulative effects, so the more dominant alleles the are in a genotype, the darker is the kernel color.
C. The phenotypes of the R1R1 R2r2 and R1r1 R2R2 genotypes will be the same because the same number of dominant and recessive alleles are contributing to each genotype.
You were with your younger cousin playing at the park and he has mixed up his legos in the sand.
Explain how you could separate this mixture.
Answer:
You can use a tea net to separate the Legos and the sand. When you scoop up the sand into the net, the sand will be sifted away because it is smaller than the holes in the tea net. But, the LEGOs are much bigger, so they will remain inside the net.
Read each of the sentences that describe a phase of meiosis. Place each sentence into the correct box.
Homologous chromosomes pair to form a tetrad.
Crossing-over may occur between the non-sister chromatids.
Homologous chromosomes line up at the center of the cell.
Homologous pairs separate and move towards opposite ends of the cell.
A nuclear membrane forms and cytokinesis follows.
The haploid number of duplicated chromosomes line up at the metaphase plate.
Sister chromatids separate and become daughter chromosomes that move to the poles.
Four haploid daughter cells are formed that are not genetically identical.
Prophase 1
Metaphase
Anaphase and Telophase !
Meiosis 11
Answer:
prophase 1(Homologous chromosomes pair to form a tetrad.
prophase 1(Crossing-over may occur between the non-sister chromatids).
Metaphase 1 (Homologous chromosomes line up at the center of the cell.)
Anaphase 1 (Homologous pairs separate and move towards opposite ends of the cell)
Telophase 1 (A nuclear membrane forms and cytokinesis follows).
Metaphase 2 ( The haploid number of duplicated chromosomes line up at the metaphase plate.
Anaphase 2 (Sister chromatids separate and become daughter chromosomes that move to the poles)
Meiosis 2: Four haploid daughter cells are formed that are not genetically identical.
Explanation:
Meiosis is a type of cell division that gives rise to gametes ( offsprings). This type of cell division occurs only in the reproductive organs. A diploid cell has two sets of chromosomes: one from the female parent and the other one from the male parent. When the diploid cell undergoes meiosis, the chromosome replicate once and the nucleus and cell duplicate twice giving rise to four haploid gamete cells.
The phases of meiosis occurs in two step divisions. Homologous pairs separate during the first round cell division which occurs in MEIOSIS 1 while the sister chromatids separate in the second nuclear division called MEIOSIS 2.
In each round of division, cells go through four stages: PROPHASE, METAPHASE, ANAPHASE, and TELOPHASE. The specific events that occur in these stages are already listed in the above answer.
Generally, at the start of meiosis, each member of a homologous pair of chromosomes, which are made up of two chromatids, moves to lie side by side. While they are thus paired, genetic material is exchanged between the chromatids. This is known as CROSSING OVER.
When the nucleus divides for the first time, the chromosomes in a given pair( not the chromatids) separate and move to opposite ends of the cell. This results in only half the number of chromosomes going to each daughter cell.
During the second nuclear division, the chromatids separate and move to opposite ends of each daughter cell giving rise to four gamete cells, each with a haploid number of chromosomes.
Meiosis is the process through which haploid gametes are formed from a diploid germ cell. It takes place in two phases of four steps each: prophase, metaphase, anaphase and telophase.
---------------------------------
Through Meiosis, a diploid cell (2n) produces four haploid daughter cells (n).
After DNA replication there are two meiotic phases.
The first one is a reductive phase, in which homologous chromosomes separate.
In the second phase, the cell suffers a new, not reductive division.
1. In the first phase, Meiosis I:
Prophase I: Chromosomes condensate and become visible. Occurs crossing-over between homologous chromosomes. Crossin-over makes the daughter cells to be genetically different from the original one. Metaphase I: Homologous chromosomes randomly align in the equatorial plane. Anaphase I: In this phase occurs the division and independent separation of homologous pairs. Each chromosome migrates to different poles. This separation generates different chromosomal combinations in the daughter cells. Telophase I: Chromosomes of homologous pairs are already in the corresponding poles, and the nuclear membrane forms again in each pole.2. In the second phase, Meiosis II:
Prophase II: Chromosomes condensate again and become visible. Metaphase II: Chromosomes join the spindle apparatus and migrate to the equatorial plane, where they randomly line up. Sister chromatids are holden together until they reach the Anaphase. Anaphase II: Centromeres divide, chromatids get separated, and each of them goes forward an opposite cellular pole. Telophase II: Once in the poles, the chromosomes become lax again, and the nuclear membrane forms again.Cytokinesis occurs at the end of Meiosis II. The final products are four haploid cells different from the original one.
According to this information, the correct order would be as follows
Prophase 1: Homologous chromosomes pair to form a tetrad.Prophase 1: Crossing-over may occur between the non-sister chromatids.Metaphase 1: Homologous chromosomes line up at the center of the cell.
Anaphase 1: Homologous pairs separate and move towards opposite ends of the cell.Telophase 1: A nuclear membrane forms and cytokinesis follows.Metaphase 2: The haploid number of duplicated chromosomes line up at the metaphase plate.
Anaphase 2: Sister chromatids separate and become daughter chromosomes that move to the poles.Meiosis 2: Four haploid daughter cells are formed that are not genetically identical.
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Using PCR to type DNA requires a much bigger sample that one used for RFLP.
True
False
List all six stages of the sensory pathway when an animal responds to information about its environment.
Explanation:
There basically four stages of sensory pathway when an animal responds to information about its environment.
and these stages of pathway are Reception, transduction, transmission, and perception.
The sensory receptors are commonly described as specialised neurons found in sense organs that helps detect and respond to stimuli. The six stages of the sensory pathway which an animal responds to information about its environment are:
Reception: This falla under sensation. It is simply a type of sensory receptors detect that stimulus is present.Transduction: This also falls under sensation. It is a type of sensory receptors whose work is mainly to convert stimulus energy into electrochemical energy.Transmission: This falls under sensation. It is when neural impulses leave sensory organs and moves to the brain.selection: This falls under perception. It acts as detectors that filter the stimuli by responding to particular features of a stimulus while also ignoring the rest.Organisation: This falls under perception: It is known to organise the characteristics of sensory stimuli in a meaningful manner. Interpretation: This Fall also under perception. It is known to give meaning to sensory stimuli.Sensation is simply regarded as a physiological process that uses sensory receptors in detecting and responding to stimuli.
Perception is referred to as the mental work of organising and interpreting sensory stimuli, making it meaningful.
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The artery that will eventually subdivide to form the posterior cerebral arteries is the _____ artery.a) basilarb) external carotidc) maxillaryd) superficial temporale) nternal carotid
Answer:
a) basilar
Explanation:
The basilar artery is an artery whose function is to supply of blood to the brain and central nervous system, thereby transporting oxygenated blood to the brainstem, cerebellum, and occipital lobes for maintaining normal brain function. This artery is 3 to 4 mm in diameter. The basilar artery is formed from the confluence of two vertebral arteries inside the cranium at the level of the medulla. The posterior cerebral arteries are formed by the bifurcation of the basilar artery, and they supply oxygenated blood to the occipital lobes and posteromedial temporal lobes.
This inner planet takes 365 days to orbit the sun
Answer:
Earth is the inner planet that takes 365 days to orbit the sun.
Explanation:
Can someone plz help me
I need help with this!
bt bb bz bz bs bs db h bj bg
Explanation:
hajans
Plz help me I a, timed
Answer:
Your answer is A) precipitation.
Write extensively the 3 main constituent of DNA
Answer:
A single nucleotide is made up of three components: a nitrogen-containing base, a five-carbon sugar, and a phosphate group. The nitrogenous base is either a purine or a pyrimidine. The five-carbon sugar is either a ribose (in RNA) or a deoxyribose (in DNA) molecule.
Explanation:
What Macromolecules are found in cheese
Answer:
Lipid
Explanation:In this lab, we used milk and varying curdling agents to make our own cheese. We then tested it to learn more about the macromolecules (lipids/fats, proteins, carbohydrates, nucleic acids). During the first part of our lab, we made cheese with the curdling agents: Chymosin FPC, Chymosin NBC, buttermilk, and water.
Where do plants access the nutrients they need?
WARNING: This answer is NOT technical! ⚠
Plants can get their nutrients from the ground and dirt. But they grow using the carbon around them (Like the carbon dixiode we breathe out).
people make clothing using fibers that come from natural materials and from synthetic materials. How do these materials differ from one another?
What happens if the cells in clean meat are not balanced (will give Brainlyest)
A student is performing experiments on a particular substance. Which
statement is an observation of a chemical property of the substance?
O A. It melts.
O B. It burns.
O C. It floats.
O D. Electricity cannot pass through it.
Will give brainly if it’s correct but if ur gonna guess don’t answer
Answer:
of what substance??
Explanation:
Answer: it burns
Explanation: a p e x
explain why excessive bleeding can lead to death
Answer:
If blood flow is cut off for more than a few minutes, the cells in your brain start to die. This impairs the parts of the body that the brain cells control. A stroke can cause lasting brain damage, long-term disability, paralysis (an inability to move), or death.
Explanation:
die from having lost too much blood The man almost bled to death.
After death the blood generally clots slowly and remains clotted for several days. In some cases, however, fibrin and fibrinogen disappears from blood in a comparatively short time and the blood is found to be fluid and incoagulable soon after death.
Excessive Bleeding Means Loosing Blood.
This Means Your Body’s Organs Are Unable To Receive The Blood They Need In Order To Survive. If You Loose Too Much Blood, You Will Perish.
se the information from the article to answer the question.
NEOs
When scientists discuss objects that might hit Earth, what term do they use to describe them as a group?
near-Earth objects
asteroids and comets
Shoemaker-Levy 9
celestial bodies
Answer:
A. near-Earth objects.
Explanation:
Science can be defined as a branch of intellectual and practical study which systematically observe a body of fact in relation to the structure and behavior of non-living and living organisms (animals, plants and humans) in the natural world through experiments.
When scientists discuss objects that might hit Earth, the term which they use to describe them as a group is near-Earth objects.
A near-Earth objects can be defined as a small solar system body such as comets and asteroids whose orbit draws it close or in proximity to the earth's orbit due to the gravitational force of attraction of nearby planetary bodies.
Basically, if the closest approach of a planetary body to the Sun is less than 1.3 AU it is considered to be a near-Earth objects.
Hence, near-Earth objects may pose a collision danger to planet earth.
Answer: A Near Earth objects
Explanation:
Use the information from the article to answer the question.
NEOs
When scientists discuss objects that might hit Earth, what term do they use to describe them as a group?
near-Earth objects
asteroids and comets
Shoemaker-Levy 9
celestial bodies
Which of the following are characteristics of Ascomycota? Check all that appply. PLEASE HELP!!
Answer:
2.spores produced in the ascus
4.important in the food industry
6.can cause disease in plants
Explanation:
Answer:
spores produced in the ascus
important in the food industry
important in the digestion of animals (leafcutter ants for one)
can cause disease in plants (dutch elm disease)
can cause disease in animals (candidiasis for one)
Explanation:
Ecosystem
Organism
Biome
Biosphere
Abiotic
Biotic
Community
.
1. Living part of the environment _____
2 Collection of abiotic and biotic factors in an environment______
3. A single living thing that can breed/produce fertile offspring______
4. Ecosystem with same climate and similar communities______
5 Individuals of the same species that live in the same area______
6. Earth with all the ecosystems_____
7 Different interacting populations that live together in an area______
8. Nonliving part of the environment______
Answer:
1 organism
8 abiotic
this is the answers I know
please help me asap!
Answer:
3,4,5
Explanation:
let me know if that helps
The grouping of rocks as igneous, sedimentary, and metamorphic is based primarily upon
differences in what
Answer:
The correct answer is - texture and composition.
Explanation:
The classification of the three types of rocks as igneous, sedimentary, and metamorphic rocks is primarily based upon the components and the texture. The sizes and shapes of grains of the mineral and other components and how they interact are present are known as texture.
Igneous rocks - melted rock deep inside the Earth.
Sedimentary rocks - layers of sand, silt, dead plants, and decomposed organism and their skeletons.
Metamorphic rocks - changed by heat and pressure underground
Which of the following describes the effect of global climate change on biodiversity: Rising ocean water temperatures have increased the populations of krill and Antarctic silverfish thus increasing Adelie penguin populations for whom these are food sources. Warm temperatures and more frequent dry periods have stressed frog species such as the coqui making them more vulnerable to a lethal fungal infection thus reducing their populations. The warming of ocean waters in conjunction with increased carbon dioxide dissolving into ocean has resulted in boon for coral reefs which are thriving. Mountain ecosystems are not too vulnerable to global climate change because only very hardy species live at high altitude.
Answer:
Warm temperatures and more frequent dry periods have stressed frog species such as the coqui making them more vulnerable to a lethal fungal infection thus reducing their populations.
Explanation:
Rise in temperature, flooding as well as drought affect biodiversity. As climate changes, there is usually an alteration of temperature as well as weather patterns, the impact is felt by
plant and animal life. According to
Scientists, there is an expectation that
number and range of species, which are regarded as biodiversity will experience declination with greatly increase in temperatures
Our Sun will eventually become which of the following?"
Brown Dwarf star
Red Giant star
Red Super Giant star
Blue Giant star
Answer:
Red Giant
Explanation:
trust me bro
Why does milk have to be kept in refrigerator? Choices:
1-The reactions that cause milk to spoil are slower at lower temps
2- Physical changes that cause milk to spoil are slower at lower temps
3- no chemical or physical changes can occur at lower temps
The following is an example of a renewable source of energy:
A.
petroleum
B.
geothermal energy
C.
nuclear energy
D.
coal
When you compare the percent similarity between nucleotide sequences for GAPDH with the percent similarity between protein sequences for GAPDH, what outcome would you predict?
a. Percent similarity of nucleotides will be identical to percent similarity of protein.
b. Percent similarity of nucleotides will be less than percent similarity of protein.
c. Percent similarity of nucleotides will be greater than percent similarity of protein.
Answer:
a. Percent similarity of nucleotides will be identical to percent similarity of protein.
Explanation:
In accordance to the central dogma of biology, PROTEINS are formed from the instructions contained in the nucleotide sequences of GENES. In other words, genes contain nucleotide sequences that holds information needed to produce proteins. This means that every protein is encoded by the nucleotides of a gene.
According to this question, nucleotide sequences of GAPDH will undergo gene expression to form protein sequences of GAPDH. Since GAPDH nucleotide sequences form GAPDH protein sequences, the percent similarity of nucleotides will be identical to percent similarity of protein.
If a person has a type A blood type, which antibodies would they have to have?
Answer:
B antibodies
Explanation:
The WBCs in the blood of that person would have A markers to identify the A antigens on the RBCs. So they would produce defense cells with B antibodies
Flying foxes are actually tree-dwelling bats.true or false
Answer:
TRUE!
Explanation:
Little red flying foxes are tree-dwelling bats. In daytime they can be seen roosting in giant camps that may include as many as a million individuals. The bats are indeed efficient fliers, as their name suggests, but time in the trees has also made them excellent climbers.
Answer:
True!!
Explanation:
Little red flying foxes are tree-dwelling bats. In daytime they can be seen roosting in giant camps that may include as many as a million individuals. The bats are indeed efficient fliers, as their name suggests, but time in the trees has also made them excellent climbers.
Many of us have been impacted by outbreaks of disease in our lifetimes. Throughout history, humans have battled outbreaks of disease; many have lost their lives to diseases before treatments and cures were discovered. Modern science and medicine have become efficient in developing vaccines and medications to control and treat outbreaks, but whether the diseases will ever truly be eradicated is in question. Considering how many of these infectious diseases exist and how easily they spread, it is important to remember safety issues to reduce and prevent transmission.
reflect over the past decade and recall a news-breaking infectious outbreak of a disease that made an impact on you. Please include a link to a news article or video related to your outbreak in your initial post. Include the following in your post:
Disease name
Infectious agent (is the disease bacterial, viral, or fungal? List the specific organism (genus species)
Mode of transmission
Signs and symptoms of the disease
Treatment (or treatments) available
Try not to duplicate another classmate’s topic (make your subject line is your disease so it is easy to check)
Explain how that story changed the way you interacted with people, family, or friends.
Answer:
ok
Explanation:
