Answer:
Test answers? Huh-?
Please help ASAP
Which of these is NOT an example of an environmental factor that can affect an organism's growth?
Inheriting the gene for purple flower petals
or
Limited or no shelter/space to nurture offspring
or
inadequate sunlight
or
insufficient access to water or nutrients
 HURRY I HAVE A TIME LIMIT!
Humans, cats, whales, and bats all have similar arm bones. What piece of evidence for common ancestry does this describe?
-homology
-embryology
-fossil record
-amino acids sequences
Answer: that they all have the bones used to make their movements so they can live and survive on there own.
Explanation:
What are the 3C’s that plant cells have, but animal cells lack?
Answer:
Cell wall, Chloroplasts, Central vacuole
Explanation:
Answer: cell wall, chloroplast, central vacuole,
Explanation:
Which drug may also cause the spread of a AIDS and Hepatitis
Answer:
heroin
Explanation:
hope this helps
in peas, both male and female sex cells -blank- are in the same flower
What is potential energy?
Answer:
the energy possessed by a body by virtue of its position relative to others, stresses within itself, electric charge, and other factors.
Answer: electric possesed by the body or electric charge
POV : i actually learned this
Explanation:
What type of veterinarian should I be?
how do the two sets of muscles work together to make air enter the lungs
Answer:
Here you go
Explanation:
downward toward the abdomen, and the rib muscles pull the ribs upward and outward. This makes the chest cavity bigger and pulls air through the nose or mouth into the lungs.
Which of the following is a form of ethnic segregation that persists in the
United States?
A. Immigrants are required to live together until they have become
naturalized citizens.
B. A federal law requires ethnic groups to live together until they
learn to speak English.
OC. Many American Indians still live on reservations where their tribes
had been relocated by force.
O D. Strong leaders encourage their followers to live together so that
they can control them more easily.
Answer:
C. Many American Indians still live on reservations where their tribes had been relocated by force.
Explanation:
Given that ethnic segregation has to do with the artificial separation of various people of different socio-cultural backgrounds.
Hence, the ethnic segregation that persists in the United States can be attributed to "Many American Indians still live on reservations where their tribes had been relocated by force."
Answer:
C. Many American Indians still live on reservations where their tribes
had been relocated by force.
Explanation:
b) What is one reason that a virus that spends a long time in the lysogenic cycle could be more
dangerous to humans than a virus that does not? (3 points)
I
Answer:
because it takes longer to process so it would stay longer so it's more dangerous
help please 30 points will give brainliest
Plants release the waste ___________ during cellular respiration and ____________ during photosynthesis.
fill in the blanks
Plants release the waste carbon dioxide during cellular respiration and oxygen during photosynthesis.
20 point quick, brainly too
Answer:
b
Explanation:
nervous and circulatory
Answer:
lol
Explanation:
3. Which type(s) of cells have genetic material that is contained in a nucleus?
A. bacterial
B. plants only
C. animals only
D. both plant and animal cells
Answer:
D. Both plant and animal cells
Explanation:
The explanation is that animal and plant cells are eukaryotic cells which means they have a nucleus which contains and protects the genetic material. Bacteria is a prokaryotic cell which means it does have genetic material but doesn't have a nucleus.
Graded for correctness: In humans, the ability to digest lactose beyond childhood is determined by a single gene on chromosome 1. L denotes the allele that gives the ability to digest lactose and l denotes the inability to digest lactose. On chromosome 3 is the gene for widows peak. A denotes the allele for no widows peak and a denotes a widows peak. A woman volunteers to be a participant in a genetic research study. Her genotype is LlAa. A doctor harvests a single egg from her body. The genotype of her egg is LA. How did her chromosomes line up at the metaphase plate during meiosis
Answer:
Metaphase I:
Homologous chromosomes are placed in the equatorial planeChromosomes carrying the dominant alleles, L and A, face one of the polesThe homologous chromosomes, carrying the recessive alleles, l and a, face the opposite pole.Metaphase II:
Chromosomes carrying the dominant alleles, L and A, are placed in the equatorial planeOne of the chromatid sisters of each chromosome faces one of the polesThe other chromatid sisters of each chromosome face the opposite pole.You will find the image in the attached files.
Explanation:
During metaphase I, homologous pairs migrate to the equatorial plane. They randomly aline with their kinetochores facing opposite poles. The random arrangement of tetrads is different in every cell going through the meiosis process. There is no equal alinement between two cells. When tetrads aline in the equatorial plane, there is no predetermined order for each of the homologous chromosomes of each tetrad to face one of the poles and then migrate to it while separating. Each of the chromosomes has two possibilities for orientation at the plane. When the new haploid cells are formed, the number of variations in each cell is also different and depends on the chromosomes that form that cell. This random order in the equatorial plane is what introduces variation into the gametes. It is almost impossible that two gametes resulting from meiosis will get the same genetic charge.
During metaphase II, fibers of the spindle apparatus take chromosomes toward the equatorial cell plane, where they line up. Sister chromatids are holden together until they reach the Anaphase, during which specialized enzymes break the bonds between chromatids and separate them. Each chromatid migrates to one of the poles. In telophase, the new chromosomes are already in the corresponding poles, and the nuclear membrane forms again. Finally, cytokinesis occurs.
In this example, we will assume no crossing-over in the prophase. I will propose the two metaphase stages.
Metaphase I: Pole 1
Chromosome 1 ---------L---- -----------A--------- Chromosome 3
----------L---- -----------A---------
Equatorial plane.....................................................................................................
Chromosome 1 ---------l---- -----------a--------- Chromosome 3
---------l---- -----------a---------
Pole 2
In this scheme of Metaphase I, homologous chromosomes are already aligned in the equatorial plane. Each homologous chromosome is facing a pole. So, in the superior part of the scheme, we have chromosomes 1 and 2 carrying the dominant alleles L and A. Both chromosomes are facing pole 1. Then, we can recognize the equatorial plane, and on the other side, we find the homologous chromosomes 1 and 2, facing pole 2, and carrying the recessive alleles, l and a.
During anaphase I, homologous chromosomes will separate and migrate to different poles. In this example, we are interested in chromosomes carrying the dominant alleles that migrate to pole 1. LL and AA.
Metaphase II: Pole 1
Chromatid 1 ---------L---- -----------A-------- Chromatid 3
Equatorial plane.....................................................................................................
Chromatid 1 ----------L---- -----------A--------- Chromatid 3
Pole 2
During metaphase II, each chromatid sister carrying the dominant alleles faces a different pole. During anaphase II they separate and migrate again.
The total result of meiosis in this particular cell is the formation of 4 haploid cells -gametes-: LA, LA, la, la
True or false cooler material in the asthenosphere faces towards lithosphere
Answer:
the answer is yes hope this helped
When a dog chases a rabbit, which combination of body systems work together to supply the animals' muscle cells with the materials they need for energy?
A.Excretory, nervous, digestive
B.Muscular, circulatory, immune
C.Integumentary, digestive, endocrine
D. Digestive, circulatory, respiratory
5) Describe crossing-over. When does crossing-over occur? What is the result?
Answer:
Crossing over occurs between prophase I and metaphase I and is the process where two homologous non-sister chromatids pair up with each other and exchange different segments of genetic material to form two recombinant chromosome sister chromatids.
Explanation:
please give me brainlist and follow
Read about invasive species. Then answer the questions provided. Wild Parsnip Describe the invasion of wild parsnip, including the harm it causes.
Answer: An invasive species is the one which compete for resources with the native species.
Explanation:
Wild Parsnip is an invasive species of plant in Europe and Asia. It grows on the roadside and the seeds of the plant disperse very easily by wind and water agents. It spreads easily and compete with native species for resources like soil nutrients, water, and others. It produces a chemical that causes rash in the human skin and the human skin becomes sensitive to sunlight resulting in development of blisters and rashes on the skin.
Answer:
came from Europe and Asia
invaded the entire state of Wisconsin
can burn your skin
reproduces rapidly
can be removed at root or with a powered brush cutter for large populations
Explanation:
How can fossils be used to determine the relative ages of rock layers?
Answer:
they use radiometric dating methods (find out what day it was formed)
Explanation:
based on the natural radioactive decay of certain elements such as potassium and carbon, as reliable clocks to date ancient events.
how it reacts to certain chemicals can determine how old it is
how to calculate the mass of sodium atom?
Answer:
22.989769
The relative atomic mass of sodium is calculated by dividing the atomic mass of sodium by the unified atomic mass unit, which is 1.66*10-27 kg. The number of 23 amu means that a normal, or stable, sodium atom weighs 23 unified atomic mass units.
Explanation:
Hope this helped Mark BRAINLIEST!!!
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1. A biologist was in a forest when he came across a family of squirrels hiding nuts for the winter. The biologist was interested in this behavior, so he stayed and watched the squirrels for a few hours. He recorded what he observed in a notebook. Which of the following explains why this type of research is NOT considered an experiment?
A. The biologist observed the squirrels and did not test variables.
B. The biologist came across the squirrels by chance and had no formal plan.
C. The biologist did not observe the squirrels for long enough to collect data.
D. The biologist did not collect valid data on the different species of squirrels present.
2. For pea plants, T represents a dominant allele for tall pea plants and t is the recessive allele for short pea plants. If two plants with the Tt genotype are crossed, what is the probability that offspring will exhibit the dominant trait?
A. 75%
B. 100%
C. 25%
D. 50%
3. Which statement is true about DNA?
A. DNA is an exact copy from parent to offspring
B. DNA contains genes that hold specific traits for an organism
C. DNA is not necessary for an organism to reproduce
D. Organisms create their own DNA sequence that is not like their parents
The biologist observed the squirrels and did not test variables. If two plants with the Tt genotype are crossed, 50% is the probability that offspring will exhibit the dominant trait. The correct options are A, D, and B respectively.
What is genetics?The study of genes, genetic variation, and heredity in organisms is known as genetics. It is an important branch of biology because heredity is essential to the evolution of organisms.
An experiment entails manipulating variables to see how they affect a dependent variable. In this case, the biologist observed and recorded what he saw rather than manipulating any variables.
Both plants in this scenario are heterozygous (Tt) for the tall trait, which means they each have one dominant allele (T) and one recessive allele (R) (t).
When they are crossed, each offspring has a 50% chance of inheriting the dominant T allele and displaying the dominant trait of tallness, as well as a 50% chance of inheriting the recessive T allele and displaying the recessive trait of shortness.
DNA (deoxyribonucleic acid) is a molecule that contains the genetic instructions for the development, function, growth, and reproduction of all living organisms.
Thus, the correct options are A, D, and B respectively.
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short note of all disease of
Bee farming
Answer:
American Foulbrood is a highly lethal and contagious disease of honey bees, caused by the spore-forming bacteria Bacillus larvae. The disease causes larvae to die after cells are capped. Worker bees have difficulty trying to remove the dead larvae, and often contaminate the hive with additional spores.
Inside a human stomach, hydrochloric acid is important in digestion. Which reason best explains why the enzymes found in other parts
of the body would not function well in the stomach?
a. The temperature is too high
b. There is not enough water
C. The pH is too acidic
d. There are not enough substrates
Answer:
C. The pH is too acidic
Explanation:
Many acids and bases in living things are secreted to provide the proper pH for enzymes to work properly. Enzymes are biological catalysts, such as pepsin, which is needed to digest protein in the stomach and requires an acidic environment.
A gardener performs experiments on her tomato plants. When graphing her data, which factor is an independent variable?
the number of fruit per plant
the amount of light each plant receives
the height of each plant
the average circumference of each plant’s fruit
Answer:
The answer is "the amount of light each plant receives
At the time of graphing the data, the factor that should be considered as the independent variable should be the light amount that each plant received.
What is the plant?The plant should be treated as a living thing that should be grown in the earth and contains the stem, leaves, and roots.
At the time when the gardener performed the experiments on the tomato plants so here, the factor should be the light amount that each plant received.
Therefore, the second option is correct.
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In the formation of pollen grains, the nucleus in the pollen will divide by mitosis to form two nuclei. Justify.
Answer:
The other two, the generative nuclei, can be thought of as non motile sperm cells. After reaching an ovule and breaking out of the pollen tube tip, one generative nucleus unites with the egg cell to form a diploid zygote.
Explanation:
This means that;
The fertilized egg with two complete sets of chromosomes, one from each parent. The zygote undergoes a limited number of divisions and gives rise to an embryo.
Which of the following effects is least likely to be as a result of deforestation?
A: A greater risk of flooding.
B: An increase in biodiversity.
C: An increase in soil erosion.
D: An increase in the level of carbon dioxide in the atmosphere.
The effect that is least likely to be a result of deforestation is an increase in biodiversity. That is option B.
Deforestation is a practice that encourages the clearing of forests for other purposes such as agricultural croplands, urbanization, or mining activities.
This practice needs to be avoided because:
posses a greater risk of flooding as deforestation erodes the soil.they provide a protective cover for the soil against the action of wind and rain thereby preventing soil erosion.the level of carbon dioxide in the atmosphere decreases as it is cleared by trees during photosynthesis.But deforestation leads to a decrease in biodiversity instead of an increase.
Deforestation can lead to biodiversity loss. This occurs when animal species that live in the trees no longer have their habitat, cannot relocate, and therefore become extinct.
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A scientist observes the cells of a newly discovered organism under a microscope. The organism has mitochondria, a cell wall, lysosomes, and ribosomes. Is this organism a plant or an animal, and how do you know? A. The organism is a plant, because it has lysosomes. B. The organism is an animal, because it has mitochondria. C. The organism is a plant, because it has a cell wall. D. The organism is an animal, because it has ribosomes.
Answer:
think the answer is:
C. The organism is a plant because it has a cell wall.
Explanation:
only plant cells have Cell Walls
How much time would it take to perform 3200 J of work with a power
output of 160 Watts
Explanation:
p =w/t
160=3200/t
t=3200/160
t =20second
A person with O type blood will have all of the following characteristics
except
Their genotype will be ii
There are no antigens on their blood cells
They can donate their blood to a person with AB blood
They can receive type A blood
Answer:
I'm O+
Explanation:
AB and A blood
O+ is universal so we can donate to anyone but only receive A and B blood
1
What theory explains how the plates of the Earth are continually moving?
A
The Continental Drift Theory
B
The Theory of Evolution
C
The Plate Tectonic Theory
D
The Big Bang Theory
Answer:
A
Explanation: