Answers
Answer:
im pretty sure its meiosis
Related Questions
Trait X is dominant to x. if you cross a homozygous dominant parent with a heterozygous parent , what is the chance that the offspring will express the recessive trait?
Answers
Answer:
50% chances
Explanation:
Here trait X is dominant to x, so alleles of homozygous dominant parent will be XX and alleles for heterozygous parent will be Xx.
When homozygous dominant parent will be crossed with heterozygous parent, the result will be XX, XX, Xx and Xx. There are total four offspring out them two offspring express the recessive trait.
Hence, there are 50% chances that the offspring will express the recessive trait.
The apple tree receives 1000kJ of light from the Sun, but only uses 500kJ. Of this, only 250kJ are stored in the tree to be transferred through the food chain.
a) Calculate the efficiency of the tree (2)
b) State the ways in which the remaining energy has been transferred out the of the food chain (3)
Answers
a) 250/1000 × 100 = 25%
b) Respiration, decomposition
Autotrophic nutrition does NOT occur in
(A) moss
(B) zooplankton
(C) tomato plants
(D) blue-green algae
Answers
Answer:
(B) Zooplankton
Explanation:
Zooplankton are heterotropic plankton. They consume Phytoplankton which are autotrophic plankton.
Autotrophic mode of nutrition does not occur in zooplankton.
AUTOTROPHS:
Autotrophic mode of nutrition is a specific type of nutrition in which certain organisms synthesize their own food, hence, do not depend on other organisms. Organisms that perform autotrophy are called AUTOTROPHS. They include green plants, algae, lower plants like mosses etc. The two types of autotrophy are photosynthesis and chemosynthesis. Zooplankton is an animal-like protist and hence cannot undergo autotrophic mode of nutrition.Learn more at: https://brainly.com/question/21582881?referrer=searchResults
pleaseeeeeee help help nowwww please
The human respiratory system intakes oxygen which is transported to all parts of the body by the circulatory system. Then, the circulatory system returns deoxygenated blood to the respiratory system.
At what level of organization does this interaction occur?
A.
organism
B.
organelle
C.
organ
D.
cell
Answers
Answer:
The answer is A. organism
Which form of succession replaces
an
existing system after a calamity?
Answers
Answer:
Secondary succession
Explanation:
Ecological succession is the term used to describe any series of change in the composition of an ecosystem over a particular period of time. Ecological succession is made up of two types viz: primary succession and secondary succession.
Primary succession involves the formation of a brand new ecosystem by the colonization of a barren area of land e.g bare rock, where no life existed. Secondary succession, on the other hand, is the recolonization of an area by a new set of organisms because the previously existing organisms have been wiped out by certain disasters e.g fire outbreak, hurricanes etc. In secondary succession, there is soil, which makes it possible for new organisms to sprout quickly after the calamity.
Example of secondary succession is when a fire outbreak burns the organisms in a community, allowing the root of grasses to sprout after.
In human blood types, alleles A and B are codominant and are both dominant to allele i. Type O blood results from the genotype ii. What blood types are possible among the children of two parents with type O blood?
A and B only
A and O only
O only
Answers
Answer:
A and O only
Explanation:
because they are codominant
(CM.05] In the United States, tornadoes generally occur because of the
freezing of ocean water
underwater earthquakes
meeting of cool and warm air masses
shifting of warm and cool ocean currents
Answers
Huntington’s disease: Huntington’s disease is a disease in which certain parts of the brain waste away; symptoms usually begin later in life. In a community in Venezuela, an allele for Huntington’s disease (represented by the letter H) is completely dominant to the allele for no Huntington’s disease (represented by a lowercase h). The three possible parental genotypes are HH, Hh, and hh. There are six possible crossings that can be made between these genotypes (for example, HHxHH, HHxHh, etc.). Show the probabilities of the genotypes and phenotypes in the F1 generation from all six possible crossings. In real human families, would you see offspring in proportions equivalent to these probabilities? Why or why not?
Answers
Answer:
Regarding Huntington's disease, it can be said that it is an inherited disease with an autosomal dominant character, so it is enough that one of the children inherits one of these characters to manifest this neurodegenerative disease, it is considered that the pattern is usually 50% of the total of children of sick parents can suffer it, however if both parents are carriers the number rises leading to 100% of the children affected, on the contrary if no parent has the dominant gene and are homozygous recessive, neither your children will suffer the disease
The possibilities are the following:
Parent 1, inheritance pattern: Hh * hh, the possible gametes for this cross-linking are H, H, h, h, offspring; Hh, Hh, hh, hh 50% of the children could be sick
Parents 2, inheritance pattern: hh * hh, the possible gametes for this cross-linking are h, h, h, h. the offspring will be; hh, hh. no sick child
Parent 3, inheritance pattern: HH * HH, the possible gametes for this cross-linking are H, H, H, H, the offspring will be HH, HH, all children may be sick, 100%
parents 4, inheritance pattern: Hh * Hh, the possible gametes for this cross-linking are h, H, h, H. the descendants will be HH, Hh, Hh, hh 50% of sick children
Parents 5, inheritance pattern: Hh * hh, the possible gametes for this interbreeding are H, h ,, offspring will be Hh all sick children
Parent 6, inheritance pattern: Hh * Hh the possible gametes for this cross-linking are H, h, the descendants will be Hh, the heterozygous descendants will have the disease.
Stephanie F. is a 30-year-old professional woman in her first trimester of pregnancy. She and her husband entertain guests frequently and enjoy specialty cheeses on these occasions. They buy fresh produce, eggs, milk, and cheese from a local farmer’s market each week and limit their intake of packaged foods. She has no food aversions and eats a variety of foods. Stephanie wants to make sure her diet is nutritious and safe for pregnancy. She decides to evaluate her typical daily intake:
Breakfast:
Coffee with cream and sugar (2-3 cups)
Orange juice (1 cup)
Bagel with lox and cream cheese
Lunch:
Fresh vegetable salad with canned tuna or deli turkey
Cheese with fruit and crackers
Iced tea with sugar and lemon
Dinner:
Beef, pork, poultry, or fish
Pasta or rice
Fresh cooked vegetables
Snacks:
Cookies and milk
Fresh fruit
Questions:
1. During her pregnancy, what special considerations for food safety should Stephanie keep in mind when buying fresh produce, juice, and dairy foods at her local farmer’s market? Explain.
2. What changes could Stephanie make to her usual breakfast to meet the current dietary recommendations for pregnancy presented in this chapter? Explain your answer.
3. Due to their high content of mercury, what types of fish should Stephanie completely avoid during her pregnancy?
4. What precautions regarding meat, poultry, seafood, and eggs should Stephanie be aware of during her pregnancy? Why is it important for her to follow this advice?
Answers
Answer:
Explanation below
Explanation:
Stefanie should be aware that eating two much of food that is reach in fat during her pregnancy is very bad. This because the food substances will make the baby to be extraordinarily big and can results to a prolonged labor for the mother.
Therefore, according to present food intake procedure, Stephanie should avoid any food that can make the unborn child necessarily big.
Which phrase describes types of freshwater wetlands? Select three options
Answers
Answer:
There are four types of freshwater wetlands, which include, peat bogs, swamps, ponds and marshes. Some examples of wetland type of swamp include, sink, vernal pool, floodplains, mire, pocosin, mangrove forest, and carr. The location, depth of water and season they determine the climate of freshwater biome.
Complete the statement to describe the calcium concentration that must be maintained in human body cells. The calcium concentration must be greater the cell than the cell.
Answers
Answer:
outside the cell than inside the cell
Explanation:
Answer:
abovoe me is correct!
Explanation:
Which graduated cylinder would you use to measure exactly 15.0mL of water for an experiment?
Answers
Answer: i think it's a A 50-mL volumetric cylinder with 0.1-mL accuracy scale
Explanation:
Which of the following cells go through MEIOSIS?
a) skin cells
b)reproductive system
c)stomach cells
Answers
Answer:
Reproductive system is the answer to your question.
2 Points
How are organisms in the domain Eukarya different from those in the domain
Archaea?
Answers
Explanation:
Domain archaea holds micro-organisms that is bacteria that has cell wall consist up of peptidoglycan .The eukarya differ from the archea and bacteria in that cells are eukaryotic,meaning they consist up of a membrane enclosed nucleus and other membrane enclosed organelle
With age, somatic cells are thought to accumulate genomic "scars" as a result of the inaccurate repair of double-strand breaks by nonhomologous end-joining (NHEI). Estimates based on the frequency of breaks in primary human fibroblasts suggest that by age 70 each human somatic cell may carry some 2000 NHEl-induced mutations due to inaccurate repair. If these mutations were distributed randomly around the genome, how many genes would you expect to be affected? Would you expect cell function to be compromised?'vVhy or why not? (Assume that 2% of the genome-l.5% coding and 0'5% regulatory-is crucial information.)
Answers
Answer:
The size of the human genome is 3.3 * 10^9 bp, as mentioned the coding and regulatory sequences of DNA is 2 percent of the entire genome, that is, 3.3 * 10^9 bp * 2%, which will be equal to 6.6 * 10^7 bp.
Let us assume that there is equal distribution of the 2000 non-homologous end joining induced mutations. Thus, 1 NHEJ shall takes place after every 3.3 * 10^9 bp / 2000, which will be equal to 1.65 * 10^6 bp in genome.
Now, the number of NHEJ in the regulatory and coding region would be,
6.6 * 10^7 bp / 1.65 * 10^6 bp = 40
A maximum disruption of two genes, that is, one at each end can take place by each NHEJ. Thus, the number of genes getting affected by 40 NHEJ would be 80, that is, about 0.38 percent of the entire genes. About 21000 genes encodes protein in human genome.
Yes, the cell function would be compromised as there will be a loss of gene, and at the same time its products, that is, the regulatory RNAs and protein would drastically influence the activity of the cells.
The activity of an enzyme was examined in the laboratory as it catalyzed the formation of the product B, from the substrate A. This reaction was carried out in an aqueous solution consisting of water and copper sulfate at a pH of 7. While attempting to repeat the experiment, a biochemist uses a solution of pure distilled water (pH = 7) and observes that the rate of formation of B has decreased dramatically. Which is the most likely possible explanation for this result?A. The enzyme’s optimal activity is not at pH 7.B. Sulfate ions inhibit binding of A to the enzyme’s active site.C. The enzyme needs copper ions to act as cofactors for optimal enzyme activity.D. The enzyme needs the presence of a coenzyme to function.E. B is unstable and cannot be measured.
Answers
Answer:
The enzyme needs copper ions to act as cofactors for optimal enzyme activity.
Explanation:
Notch is a receptor protein displayed on the surface of certain cells in developing fruit fly embryos. Notch’s ligand is a membrane-bound protein called Delta that is displayed on the surface of adjacent cells. When Notch is activated by its ligand, the intracellular tail of the Notch protein becomes separated from the rest of the protein. This allows the intracellular tail to move to the cell’s nucleus and alter the expression of specific genes. Which of the following statements best explains Delta’s role in regulating cell communication through the Notch signaling pathway?
A) Delta transmits a chemical signal to all the cells of a developing embryo.
B) Delta allows the cells of a developing embryo to communicate without making direct contact.
C) Delta restricts cell communication to short distances within a developing embryo.
D) Delta determines which cells in a developing embryo express the gene that encodes the Notch protein.
Answers
Answer:
OPTION C- Delta restricts cell communication to short distances within a developing embryo
Explanation:
Notch is a receptor protein, which is displayed on the surface of certain cells. It is observed in the developing fruit fly embryos.
The correct answer is:
Option C. Delta restricts cell communication to short distances within a developing embryo
Delta-Notch signaling pathway in which notch is a receptor protein. Notch transduces the short-range signals by interacting with the ligands like Delta.
Delta restricts the short-range cell communication distances within a developing embryo of fruitflies.
Therefore, option C is correct.
To know more about Delta-Notch signaling, refer to the following link:
https://brainly.com/question/9639650
Why is there a border between light and dark on the moon
Answers
Answer:
As the Moon orbits around the Earth, we are able to see more or less of the half that is illuminated. ... There is a border between light and dark on the moon because the sun illuminates the half of the moon that is facing it. Leaving the other half dark.
Explanation:
Hope this helps!
The moon is the earth's only natural satellite and it gets its light from the sun. The moon changes its phases from a new moon to a full moon.
The terminator is the dividing line that is found between the moon's lighter and darker sides. It is sometimes known as the twilight zone. It can be seen during the rising and setting of the sun. The line is there so as to indicate the difference between night and day. The sun can illuminate only that part that is facing it. As the moon also rotates around the earth only that side is visible.Hence the sunlight travels in a straight path and can't reach the other side.
Learn more about the there border between light and dark on the moon.
brainly.com/question/21644751.
Gene Expression word bank! Help please!!
Answers
Answer:
(isn't copied, my own work from my own assiangment)
Explanation:
Gene expression starts in the DNA, which is located in the nucleus of a cell, an enzyme called RNA polymerase copies the gene’s DNA and creates an RNA sequence into an RNA transcript that complements the copied DNA. Then the RNA sequence is modified through a protein that will be splicing the RNA strand, this protein is called the spliceosome. The spliceosome takes out introns and pieces together exon a to create a mature messenger RNA(mRNA). Once the mRNA is created, it will transport to the cytoplasm of the cell. Then the ribosome protein and ribosomal RNA’s will translate the mRNA into amino acids, each amino acid is brought to the ribosome by an RNA called transfer RNA(tRNA), then it is added to a growing polypeptide chain. Once the polypeptide is complete, the chain is folded and made into a three-dimensional working protein.
HELP Using your knowledge of nonrenewable energy sources, choose the answer that BEST describes the environmental impact (s) associated with these energy sources.
Non renewable energy sources such as coal, oil and natural gas contribute to air pollution and cost more money.
Non renewable energy sources do not really have any major impacts on the environment.
Solar energy is the best type of energy for the environment.
Non renewable resources such as coal, oil and natural gas contribute to air pollution, water pollution and global warming.
Answers
Answer:
Non renewable resources such as coal, oil and natural gas contribute to air pollution, water pollution and global warming.
Explanation:
Non-renewable energy sources are the energy sources that do not naturally replenish themselves. At some points in the nearest future, their sources would be become depleted.
Non-renewable energy sources such as coal, crude oil and natural gas contribute to the pollution of the environment in varying degrees. They require burning and this process leads to the release of gases such as carbon dioxide, carbon monoxide, oxides of sulfur and nitrogen,methane, water vapor, etc.
The released gases often posses different threats to organisms in the environment at certain level, constituting what is known as environmental pollution. Some of them dissolve in rain water to cause acid rain, some are directly poisonous when inhaled by living organisms, while a host of the pollutants absorb radiation from the sun and cause the warming of the planet, a phenomenon known as global warming.
Crude oil spillage or that of the any of its derivatives cause various environmental problems. They are poisonous to aquatic lives and render water useless for humans.
Earthquakes can occur along
___________ lines at __________
boundarie
Answers
Answer:
Earthquakes can occur along fault lines. The second part is on the tip of my tongue but can't remember it.
Explanation:
Answer:
Fault lines, plate bounderies?
Explanation:
i believe it is-
Earthquakes can occur along Fault Lines at Plate boundarieswhat is the kingsnakes closest relative
dog
stick insect
goldfish
Answers
Answer:
goldfish
Explanation:
There are many organism which shows some relative character with other organisms.
Kingsnakes and goldfish has some similarities that makes them closest relative. They both are cold blooded and have common phylum that is Chordata. They both are vertebrates and their spinal cord is enclosed and protected by series of bones.
some species of kingsnakes such as Mexican milk snake and red milk snake and goldfish have posses coloration and patterning which protect them from invasion of other organisms. They both have scales in their body, though the scales are not homologous.
Hence, the correct option is goldfish.
What rocks will likely weather the least
Answers
Answer:
Rocks are in dry climate
Explanation:
Several types of rock , like granite, are very repellent to weathering. Moreover, igneous rocks serve to heat slowly because it is difficult for water to penetrate into them.
Why could’nt solid ice have been merged into the Earth when it was created?
a. Ice wasn’t made yet
b. All the ice that formed went to Mars
c. Ice could only form on comets
d. It was too hot in the inner solar system at the time of its formation
Answers
Answer: Option B.
All the ice that formed went to Mars
Explanation:
Ice is the solid part of water i.e frozen water. It appear transparent. It is abundant and close to the sun. It is abundant on Earth surface, particularly the polar regions.Frozen water also lies beneath the surface.
All ice that formed went to the Mars because Mars is closer to the Earth.
Two species a cactus and a Venus fly-trap, have a water intake system that’s similar in function but not in structure. What type of structure is this
Answers
Answer:Are there answer options?
Explanation:
A bald man marries someone who is not bald but whose father was bald. What is the % chance of a child who will eventually be bald?
1/4 chance of a girl and
2/4 chance of boy with baldness all will be bald
1/4 chance of a girl and 1/4 chance of a boy of all the children
2/4 girls bald and 2/4 boys bald
Answers
Answer:
The girl.
Explanation:
Water filters down through the surface and enters groundwater or aquifers, by ________ A percolation B precipitation C condensation PLEASE HURRY IN A TEST!!!!!!!
Answers
Answer:
A. percolation
Explanation:
Which of these produces the cell's chemical energy?
A. Endoplasmic reticulum
B. Membrane
C. Mitochondria
D. Nucleus
Answers
Hope that helps! :)
Answer:
C
Explanation:
what are the three parts of a DNA molecule
Answers
Answer:
A phosphate group, a sugar group, and one of four types of nitrogen bases
Explanation:
DNA is made of chemical building blocks called nucleotides. These building blocks are made of three parts: a phosphate group, a sugar group, and one of four types of nitrogen bases. To form a strand of DNA, nucleotides are linked into chains, with the phosphate and sugar groups alternating.
Select statements that accurately describe receptor tyrosine kinases (RTKs).
a) The intracellular domain has phosphatase domains.
b) Some RTKs are dimeric in the presence of a ligand.
c) Ligand binding is required for autophosphorylation (cross‑phosphorylation).
d) The structure includes a transmembrane helix.
e) The α subunit contains seven α helices that span the membrane.
f) A ligand binds to the extracellular domain.
Answers
Answer: B,C,D,F
Explanation:
Of the given propositions it is correct that:
B. RTKs are generally (but not always) monomeric in the absence of ligand.
The observed structure of most RTKs are monomeric, thus their structure will adapt to the needs of the organism
C. A ligand binds to the extracellular domain.
When the cell can express extracellular domains, many of the ligands that circulate through the medium will be able to find their targets and trigger reactions.
D. Ligand binding is required for autophosphorylation (cross phosphorylation).
After the ligand finds its domain, the union will generate conformational changes, including autophosphorylation. which will produce chain reaction
F. The structure includes a transmembrane helix.
it is true that the membrane has a propeller that allows its conformation