Answer:
B. New predators move into the ecosystem.
Explanation:
A, C, and D are all abiotic (nonliving) factors that could limit a community in an ecosystem.
What are reactants of cellular respiration
which is true regarding the process of meiosis I?
A) chromosome Number is reduced from diploid to haploid
B) sister chromatids in a cell undergoing are always identical
C) Most homologue pairs do not have any crossovers during prophase I
D) sister chromatids separate to opposite ends of the cell
Answer: The correct option is A (chromosome Number is reduced from diploid to haploid)
Explanation:
In sexual reproduction, offspring are produced by fusion of two different sex cells which usually come from two different parents. These sex cells are know as gametes.
Meiosis is a type of cell division that gives rise to gametes in which the chromosome number is halved. Thus, the gamete cell is said to contain a haploid number (n) of chromosomes.
A diploid cell has two sets of chromosomes: one from the male parent and the other from the female parent. When a diploid cell undergoes meiosis the following occurs:
--> the chromosomes replicate once and
--> the nucleus and cell duplicate ( divide equally) twice.
As a result, the diploid parent cell gives rise to four haploid gamete cells. Therefore the statement "chromosome Number is reduced from diploid to haploid ' is true concerning meiosis I.
The "ribopart in the name deoxyribonucleic acid refers to the a. Rungs of the spiral ladder b. Bonds that hold two strands together C. Sugar component of DNA d. Type of helical arrangement
What tells cells how to make proteins
Answer:
The DNA of the cell tells the cell how to make proteins
Explanation:
PLEASE HELP!!! Q AQ
What type of system is required to maintain the amount of sugar in the blood at a certain level, making sure it does not rise too high or fall too low?
A. one negative and one positive feedback loop
B. two negative feedback loops
C. two positive feedback loops
D. one negative feedback loop
Answer and i will give brainly
In the cross Bb x Bb (two heterozygous mice), what percentage of the offspring would you predict to have the same phenotype as the parents? 0% 25% 50% 75% 100%
Answer:
75%
Explanation:
A phenotype refers to observable traits of an individual, such as eye color, height, and blood type. Some traits are also determined by environmental factors.
A phenotype refers to the physical characteristics of an organism.
In the cross Bb x Bb (two heterozygous mice), 75% of the offspring would you predict to have the same phenotype as the parents.
Answer:
75%
Explanation:
If you found a cell of unknown origin with a cell membrane, ribosomes and DNA, can the cell be PROKARYOTIC?
Answer:
Yes. both prokaryotic cells and eukaryotic cells have ribosomes, DNA and a cell membrane.
HELP ME PLEASE I WILL GIVE BRAINLIEST IF CORRECT AND EXTRA POINTS I CANNOT FAIL THIS SCIENCE TEST.
Which statement describes the amount of energy passed to the hawk in the energy pyramid above
A. The hawk has 50 percent of the energy available to it.
B. The hawk has the least amount of energy available to it.
C. The hawk has the most amount of energy available to it.
D. The hawk has no energy available to it.
I took this before the answer is B
Answer:
the answer is B
Explanation:
this is sooooooooooo easy
NEED IT ASAP ! ! ! What type of deposition would create sand dunes? Earth/Environmental Science
Answer:
Earth deposition, wind would blow the sand and have it pile up
Explanation:
fill in the blanks with the word that best completes the analogy
10. DNA is to T as RNA is to ___
11. DNA is to deoxyribose as RNA is to___
PLEASE HELP ME!!
These notes were taken during a class about biological evolution, but the subject title is missing.
-results from immigration
-new genes brought into a population
-variation in a population increases
What do the notes describe?
gene flow
natural selection
genetic drift
mutation
Answer:
gene flow
Explanation: you can call gene flow migration as long as it involves fertile individuals or gametes
PLEASE I NEED HELP ASAP!! WILL GIVE BRAINLIEST AND 100 POINTS!!! When you cross two heterozygous organisms, what is the probability that the offspring will show the dominant phenotype? (HINT: You may want to draw a Punnett Square on a separate piece of paper to help.)
A. 100
B. 75
C. 50
D. 25
E. 0
Answer
75% chance
Explanation:
The dominant and recessive are the terms used to explain the phenotypic traits and genetic makeup of an organism. The cross between a heterozygous species will result in a 75% chance of the species expressing a dominant phenotype.
The correct answer is:
Option B. 75%
The heterozygous condition refers to the one dominant and one recessive allele, whereas purebred is the condition in which both alleles are either recessive or dominant.
The dominant alleles are always expressed in purebred and heterozygous conditions.
The recessive alleles are expressed in purebred conditions only.
In the given attachment, consider the cross between round shaped-seeds in heterozygous conditions.
Thus, the chance of progeny will have round-shaped seeds is 75%.
To know more about monohybrid cross, refer to the following link:
https://brainly.com/question/1185199
Which state does not have a National Park
Delaware
Rhode Island
North Dakota
All states have a National Park
Answer:
I think it's Delaware...
Explanation:
But it's not the only state without a national park.......
what does a heterotroph mean?
Answer:
An animal that cannot make its own food.
Explanation:
A heterotroph is an animal or life source that cannot make its own food, so it depends on others things, such as plants or other animals. These types of listings can be as followed :
Carnivores
Herbivores
Omnivores
Movement of the particles across the membrane stops when the concentration gradient no longer exists, the particles will continue to diffuse due to random motion
Answer:
Once the concentration gradient no longer exists, particles will continue to diffuse due to random motion.
Explanation:
When there is a permeable membrane between two solutions with different concentrations, the concentration gradient will go from the compartment with more particles to the one with fewer particles to valance the concentrations on both sides of the membrane. Once the concentrations are equal, particles will still randomly move from one side to the other, but the number of particles that move to one side is almost the same as the number of particles that move to the other, so there is still valance and the same concentration in both sides.
What are two genotypes that could produce a dominant phenotype?
Answer:
A homo-zygous dominant genotype and a heterozygous genotype
Explanation:
A homo-zygous dominant genotype refers to a genotype that contains two copies of the dominant gene variant, i.e., two dominant alleles at its locus, thereby individuals carrying this genotype will show a dominant phenotype. Moreover, a heterozygous genotype is a genotype that contains both dominant and recessive alleles at its locus. In a heterozygous genotype, the dominant allele is always expressed and masks the recessive allele, thereby showing a dominant phenotype.
The total amount of all energy in the universe is...
O slightly increasing
O slightly decreasing
O always the same
O always zero
Answer:
Always the same
Explanation:
The first law of thermodynamics, also known as Law of Conservation of Energy, states that energy can neither be created nor destroyed; energy can only be transferred or changed from one form to another. ... In other words, energy cannot be created or destroyed.
PLEASE HELP ASAP ILL GIVE BRAINIEST
Do you place an item in the autoclave before or after washing it?
Answer:
Wash it first to remove obvious soil or residue.
Then put it into the autoclave to sterilize it.
We live in the troposphere.
True or false
Which layer of the rainforest usually receives the most direct sunlight?
the understory
A. the canopy layer
B. the forest floor
C. the emergent layer
D. the understory
Answer:
The emergent layer
Explanation:
This part of the forest has high tree tops
Answer:
The layer that get the most sunlight is the emergent layer.
Explanation:
the reason that is the awnser is the emergent layer is the highest part of the tree.
According to this diagram, which way would the molecules need to move in order for the figure above to represent active transport?
molecules inside and outside a cell, with more molecules outside of the cell than in
Molecules inside the cell move outside the cell.
Molecules outside the cell move inside the cell.
The molecules will not move.
Molecules will move into and out of the cell at the same time.
Answer:
Molecules inside the cell move outside the cell.
Explanation:
Is it varration , overpopulation or adaption On average, sea turtles lay about 110 eggs in a clutch. However, only a fraction of the baby turtles make it to the ocean. Then, an even smaller number have offspring of their own.
Answer: this is adaptation, but not in the way suggested in the question.
Explanation:
The question is suggesting that the 1% or so of turtle hatchlings that make it to maturity are the result of a variation that gives a selective advantage. This is not so. The only thing being selected for is sheer luck. The underlying adaptation is that all eggs hatch within a short period, so that predators are overwhelmed by numbers and some offspring by chance make it to the water, still dangerous, but less so than the sand. After the hatchlings reach the sea chance will still be a factor, but it is at this stage that natural selection may operate on advantageous variations.
There are two reproductive strategies, common to plants as well as animals. Turtles represent one of those strategies, which is to invest resources to produce large numbers of immediately self-sufficient offspring so that at least some will survive. The other strategy is to produce one or few offspring and invest resources in protecting and feeding it or them until self-sufficient and capable of surviving to maturity.
These are adaptations which are selected for because they confer advantage for the species concerned. One or the other may be the better solution depending on the species. Mammals, for example, invest in the latter strategy.
Which of the karyotypes shown is from a normal female?
A
B
C
D
Answer: c
Explanation:
Females have two X chromosomes and males have an x and a Y chromosome. The Y chromosome is significantly shorter because it doesn’t carry as many genes. C is the only option that has two X chromosomes
The karyotype of a normal female is in diagram c. The correct option is c.
What is a karyotype?A karyotype is an individual's complete set of chromosomes. The phrase might refer to an image created in a lab showing a person's chromosomes separated from each individual cell and organized in numerical order.
If a person has a mutation, the karyotype can tell whether they are a man or a mulcher. This is so because a person's chromosomes are represented by a karyotype.
A 23-pair karyotype, one of which is made up of sex chromosomes that are XY for males and XX for women, is required for a person to be considered to be mutation-free.
Males have an x and a Y chromosome, while females have two X chromosomes. The Y chromosome is considerably smaller because it contains fewer genes. The only choice with two X chromosomes is C.
Therefore, the correct option is C.
To learn more about karyotype, refer to the link:
https://brainly.com/question/21086814
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Name the hormone released when the blood glucose concentration is too low
Explanation:
Glucagon
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Answer:
Glucagon is released to stop blood sugar levels dropping too low (hypoglycaemia), while insulin is released to stop blood sugar levels rising too high (hyperglycaemia). The release of glucagon is stimulated by low blood glucose, protein-rich meals and adrenaline (another important hormone for combating low glucose).
Explanation:
hope this help
..mark as a brainlestIf 30% of a DNA sample is composed of thymine nucleotides, what percentage of the DNA sample would be composed of cytosine nucleotides?
Answer:
20%
Explanation:
Pairing do occur between a purine and a pyrimidine base or a pyrimidine and a purine base where Adenine pairs with Thymine and Guanine pairs with Cytosine.
DNA(deoxyribonucliec acid) sample is usually compose of 100% nucleotide base,
Since 30% of the sample section is compose of thymine then Adenine the base pair will also be 30% this is because adenine will always pair with thymine and each will occur in equal quantity. Together, adenine and thymine compose 60% of the segment.
While the remaining 40% of the section is composed of guanine and cytosine pairs and since the two bases will be equal in quantity, 20% of the DNA section will be cytosine nucleotide.
What is does the Law of Dominance state?
A. How do tropical rainforest ecosystems differ from other forest ecosystems?
They have less biodiversity and less light that reaches the forest floor than other forest ecosystems.
B. They receive more rainfall and have warmer average temperatures than other forest ecosystems.
C. They have warmer average summers and milder average winters than other forest ecosystems.
D. They have more limited areas along coastal areas than other forest ecosystems.
Answer:
C
Explanation:
Answer:
C
Explanation:
They have warmer average summers and milder average winters than other forest ecosystems.
Olivia was reading about the Earth's history. She grew interested in the Quaternary period in the Cenozoic era and studied it further. The Quaternary
period is best known for which two major events?
A. the rise of reptiles and flowering plants
O
B. the rise of mammals and swimming mammals
O
c. the ice ages and the rise of humans
O
D. the rise of dinosaurs and other reptiles
Answer:
oh yeah daddy
mink ,
Explanation:
Answer:
B
Explanation:
The Cenozoic era was known to be called the age of mammals, because the largest land animals have been mammals during that time. Meaning Mammals that swim would also be living during that time with land mammals.
Why might forensic scientists want to
compare DNA from different sources?
Answer:
to crose check to make shure they have the right sample.
Explanation:
Explanations? we don't need Explanations where were going.