Answer:
A
Explanation:
A
NEED BIO HELP ASAP 30 POINTS !!!!!!!!!!!!!!!!!!!!!!
1. Cell starts into mitosis phase of the cell cycle.
2. Helicase begins to break the hydrogen bonds between the nitrogen bases. (The double helix has to be unwound in order to expose the nucleotides)
3. DNA polymerase attach the free-floating nucleotides to the exposed nitrogen bases. (this allows a new DNA strand to be made on the existing one)
4. Free floating nucleotides pair up with exposed nitrogen bases (this is what really builds the new strand, based around the template strand)
5. Two new molecules of DNA are created
Statements:
Adenine
Cytosine (Car in the Garage, Apple in a Tree is a good trick to know how they pair)
DNA
Replication
Double helix
Inbreeding involves what?
A. breeding one species with another to bring in a characteristic.
B. breeding unrelated dogs to increase genetic diversity.
C. breeding for less desirable characteristics.
D. breeding closely-related dogs with similar characteristics.
Answer:
a or d not sure which
Explanation:
Color-blindness results from both the expression of a single recessive sex-linked allele (b.)
Which of the following is a genotype of a colorblind male?
XbY
XBXB
XBY
XbXb
Answer:
XbY
Explanation:
because the question asks genotype of a male, the chromosomes would be XY, so XBX and XbXb can be eliminated leaving only XBY and XbY. XBY is incorrect because the question states that colorblindness is represented by lowercase b, so the correct answer is XbY.
Determine if each factor is biotic or abiotic
Answer:
Grasshopper: Biotic
Pond water: Abiotic
Dead tree: Abiotic
Soil: Has both but it is better to say Abiotic
Fungus: Biotic
Temperature: Abiotic
Answer:
Biotic Factors: grasshopper, dead tree, fungus
Abiotic Factors: Pond water, soil, temperature
A student is observing plant cells and animal cells under a microscope.
Which of the cell structures would be found in both the plant and the animal cells when listed in the chart above?
A. nucleus
B. cell wall
C. chloroplast
D. large central vacuole
PLSS I WILL GIVE YOU BRAINLYEST!!
Give a written example of a habitat starting at
primary succession and ending up in a climax
community.
Explanation:
WRITTEN BY
The Editors of Encyclopaedia Britannica
Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree....
See Article History
Alternative Title: primary plant succession
Primary succession, type of ecological succession (the evolution of a biological community’s ecological structure) in which plants and animals first colonize a barren, lifeless habitat. Species that arrive first in the newly created environment are called pioneer species, and through their interactions they build a simple initial biological community. This community becomes more complex as new species arrive. Primary succession is distinguished from secondary succession, which is the recovery of an existing biological community after a disturbance sets back the community’s ecological structure to an earlier stage.
Primary succession
Primary succession
Primary succession begins in barren areas, such as on bare rock exposed by a retreating glacier. The first inhabitants are lichens or plants—those that can survive in such an environment. Over hundreds of years these “pioneer species” convert the rock into soil that can support simple plants such as grasses. These grasses further modify the soil, which is then colonized by other types of plants. Each successive stage modifies the habitat by altering the amount of shade and the composition of the soil. The final stage of succession is a climax community, which is a very stable stage that can endure for hundreds of years.
Encyclopædia Britannica, Inc.
Primary succession
QUICK FACTS
RELATED TOPICS
Ecological succession
Pioneer species
Lava-sterilized landscapes, newly formed sand dunes, and rocks either deposited or scoured by retreating glaciers are examples of settings in which primary succession often occurs, because these places either lack soil or their soil cannot sustain life. On newly created volcanic islands, for example, after the rock cools, seeds blown by the wind may lodge in crevices, germinate, and take root. Often these first colonizing plants are weedy species, such as fast-growing grasses and lichens, that do not grow tall but do reproduce quickly. After these plants germinate and grow, they die and decompose, and their remains create pockets of soil in which other plants, as well as fungi, can become established. Over time, such fast-growing vegetation covers more and more of the island, and seeds from other, hardier, taller-growing plants arrive on the wind or are transported by birds that begin to use the island as a stopover during migration.
Surtsey
Surtsey
Surtsey, a volcanic island off the southern coast of Iceland, emerged from the Atlantic Ocean in a fiery eruption in November 1963. Shortly thereafter plants such as sea rocket (Cakile arctica), sand ryegrass (Leymus arenarius), oysterleaf (Mertensia maritima), and seaside sandplant (Honckenya peploides) colonized the island. Much of Surtsey's vegetation is composed of lichens and mosses. However, some higher plants such as the dwarf willow (Salix herbacea) and tea-leaved willow (S. phylicifolia) have grown on the island since the 1990s.
ARCTIC IMAGES/Alamy
These new arrivals shade out sun-loving grasses, shrubs, and other pioneer species, and their cast-off parts decay and add to the soil, altering it by mixing with soil particles left by the decay of earlier plants. More plants and animals arrive (the latter rafting over on flotsam or flying from nearby islands or the mainland), and some become established on the island. The ecosystem changes with each new arrival. Over several decades, the biological community transitions from collections of pioneer and intermediate species to a climax community—that is, a relatively balanced ecological stage whose ecological structure and species composition are far less volatile than those of earlier stages.
The Editors of Encyclopaedia Britannica
This article was most recently revised and updated by John P. Rafferty, Editor.
LEARN MORE in these related Britannica articles:
Weeping willow (Salix babylonica).
plant: Succession and zonation
…plants has long been called primary succession. In this case the succession was in response to...…
energy transfer and heat loss along a food chain
community ecology: Types of succession
Two different types of succession, primary and secondary, have been distinguished. Primary succession...…
ecological disturbance caused by forest fire
ecological disturbance: Disturbance intensity and the pace of recovery
Primary succession occurs in a landscape that previously was devoid of life. For example, following the...…
HELP!! I WILL MARK BRANLIEDT!! HERES A PIC ITS ABOUT NATURAL AND SELECTIVE BREEDING:)
Answer:
Natural Selection
- The process happens due to environmental activity
- It takes a relatively long period of time.
- Excessive warmer temperatures in a region have caused rabbits with longer fur to slowly disappear.
Selective Breeding
- Organisms do not choose to thrive but are selected because they are best adapted to the environment.
- A Labradoodle is created by scientists to be hypoallergenic but still look like a Labrador.
- It takes place over a relatively short period of time.
- Humans have a decision in the outcome of the offspring.
- Apples have gotten much larger over the last 30 years due to customer demand
Explanation:
From the above, I have been able to place them in their respective categories.
Natural selection simply has to do with nature. It is a process in nature that leads to the better adaptation of organisms to survive and reproduce in their environment. This type has to do with the natural environment. As nature plays out, it can take longer time and the environment can affect survival rate. Natural selection can lead to speciation.
Selective breeding can also be referred to as artificial selection. This process has to do with the input of man in developing new organisms that possess desirable characteristics and that can adapt to a specific environment. In other words, humans control and decide the outcome of the species that are reproduced. Such breeding process take relatively short time.
9. What is a larger threat to the people who live in Hawaii, lava flows or a tsunami? Explain
your choice.
In a solution, salt is considered the
solute
solvent
Answer:
Solvent
Explanation:
For hundreds of years the island of Jamaica has warm tropical weather.
A. weather
B. climate
C. climate change
Develop a scenario with a Punnett Square and discuss how the offspring outcomes change if the gene
expression is governed by:
o Dominant/recessive genes
o Codominance
o Incomplete Dominance
Answer:
o Dominant/recessive genes
Cross: Rr x Rr (two round-seeded plants)
F1) 25% RR, 50% Rr, 25% rr
75% Rounded seeds, 25% elongated seeds
o Codominance
Cross: BB x WW (black chicken with white chicken)
F1) 100% BW
100% speckled chickens
o Incomplete Dominance
Cross: RR x rr (Red-flowered plant with white-flowered plant)
F1) 100% Rr
100% Pink-flowered plants
Explanation:
Due to technical problems, you will find the complete answer and explanation in the attached files
What is one cause of long-lasting climate change?
A. Volcanic activity
B. Earth’s elliptical orbit
C. Earth’s rotation
D. The Sun’s elliptical orbit
Answer:
b
Explanation:
_____________ can change based on the force of gravity on an object.
A. Mass
B. Weight
C. Matter
Answer:
A mass
Explanation:
I learned it in 8th grade.
a. mass
explanation:
a. What is likely to happen to coral reefs if atmospheric carbon dioxide
concentrations continue to rise? What will be the consequences for the biosphere?
Answer:
Coral reefs are under threat if atmospheric carbon dioxide levels continue to rise, new research has shown. When CO2 dissolves in the ocean, it raises the water's acidity level. This prevents a build up of calcium carbonate, which corals draw from seawater to build their skeleton
Explanation:
If atmospheric carbon dioxide continues to rise it creates a threat condition to coral reefs to their skeletons.
What are coral reefs?According to recent research, coral reefs are in danger if atmospheric carbon dioxide levels keep rising. The ocean's water becomes more acidic as a result of CO₂ dissolving there.
This hinders the buildup of calcium carbonate, which corals use to create their skeleton from saltwater. More CO₂ is absorbed by the seas when CO₂ emissions rise.
The water is getting warmer as a result of increased greenhouse gas emissions. In water that is too much warmer or colder than 26–27 degrees celsius, coral cannot survive.
Therefore, as a result, coral has a tougher time developing its shells since the water becomes more acidic.
Learn more about coral reefs, here:
https://brainly.com/question/15808522
#SPJ2
Epistasis, such as albinism, is a result of ______. polygenic inheritance. multiple alleles. incomplete dominance. . codominance.
what is the powerhouse of the cell
Answer: mitochondria
Explanation: ur welcome
Female New Zealand mud snails are able to produce viable offspring that develop into mature adults from unfertilized eggs.
Answer:
It is called parthenogenesis
Explanation:
This is because parthenogenesis is a type of reproduction where the female produced egg develop into offspring without fertilization from the sperm of the male parent. It is a type of asexual reproduction in which unfertilized egg from the female develop into offsprings either both sexes or male only or female only.
What happens to food and air when they enter the body?
21. The graphs show the results from an investigation of relative enzymatic activity of four different enzymes in acidic and basic environments.
Which enzyme would most likely function well in the stomach?
Pepsin
Papain
Chymotrypsin
Cholinesterase
Which of the four factors that affect evolution apply to the finches that the Grants studied? Use
evidence from your research to support your answer. (15 points)
Answer:
Natural Selection in Real Time
"When we made the comparison between the size of the offspring generation and the population before selection, we found a measured, evolutionary response had taken place and it was almost identical to what we had predicted."
-Peter Grant
Darwin thought that evolution took place over hundreds or thousands of years and was impossible to witness in a human lifetime. Peter and Rosemary Grant have seen evolution happen over the course of just two years.
The Grants study the evolution of Darwin's finches on the Galapagos Islands. The birds have been named for Darwin, in part, because he later theorized that the 13 distinct species were all descendants of a common ancestor. Each species eats a different type of food and has unique characteristics developed through evolution. For example, the cactus finch has a long beak that reaches into blossoms, the ground finch has a short beak adapted for eating seeds buried under the soil, and the tree finch has a parrot-shaped beak suited for stripping bark to find insects.
The Grants have focused their research on the medium ground finch, Geospiza fortis, on the small island of Daphne Major. Daphne Major serves as an ideal site for research because the finches have few predators or competitors. (The only other finch on the island is the cactus finch.) The major factor influencing survival of the medium ground finch is the weather, and thus the availability of food. The medium ground finch has a stubby beak and eats mostly seeds. Medium ground finches are variable in size and shape, which makes them a good subject for a study of evolution.
The first event that the Grants saw affect the food supply was a drought that occurred in 1977. For 551 days the islands received no rain. Plants withered and finches grew hungry. The tiny seeds the medium ground finches were accustomed to eating grew scarce. Medium ground finches with larger beaks could take advantage of alternate food sources because they could crack open larger seeds. The smaller-beaked birds couldn't do this, so they died of starvation.
In 1978 the Grants returned to Daphne Major to document the effect of the drought on the next generation of medium ground finches. They measured the offspring and compared their beak size to that of the previous (pre-drought) generations. They found the offsprings' beaks to be 3 to 4% larger than their grandparents'. The Grants had documented natural selection in action.
While beak size is clearly related to feeding strategies, it is also related to reproduction. Female finches tend to mate with males that have the same size beaks. These factors together can add to the development of new species.
The Grants return each year to Daphne Major to observe and measure finches. They have been collecting data on the finches for over 25 years and have witnessed natural selection operating in different ways under different circumstances.
While taking a nature walk with their class, students observe many mushrooms growing among the fallen leaves on the forest floor.
– What is the role of mushrooms in the forest ecosystem?
– What other type of organism performs a similar role in the forest ecosystem?
This is for a writing thing can u guys write about it I really need help thank u
Answer:
The mushrooms act as decomposers, there are many other species that also does this such as worms
What is the role of acid in our stomach ?
Answer:
Hydrochloric acid helps your body to break down, digest, and absorb nutrients such as protein. The hydrochloric acid found in the stomach facilitates digestion by disintegrating complex large food molecules into simpler molecules. The acid activates the pepsinogen enzyme required to digest proteins.
19. During which phase of the cell cycle does the chromosome number increase to 4n?
A)Gap 2
B)synthesis
C)Interphase
D)mitosis
Answer:
I believe it's gap 2
Explanation:
i hope this helps if not im sorry
Please help. This model shows a strand of DNA. Identify how information for specifying the traits of an organism is carried in the DNA.
A)
DNA codes for the sequence of nucleotides in RNA.
B)
The nitrogen bases in DNA code for the sequence of amino acids that make
up a protein
C)
The nitrogen bases in DNA code for the sequence of nucleic acids that
make up a protein.
D)
The sugar molecules found in the backbone of a DNA molecule code for
the RNA nucleotides.
Answer:B
Explanation: I just did it
Answer:
the answer is B)
Explanation:
DNA is made of nucleotide nitrogen bases, witch turn into Amino Acids, and then finally into protein
can anyone answere this question please
Answer:
Missense
Explanation:
A missense mutation is a mistake in the DNA which results in the wrong amino acid.
The fluidity of the cell membrane is maintained by?
Answer:
Unsaturated fatty acids.
Explanation:
HOPE THIS HELPED
When is the carbon stored in plants released?
a. during cellular respiration
b. during photosynthesis
C. when they die
d. none of the above
Answer:
Helloooo
C. When they die
Explanation:
thanks ☺️
Importance of plants from an economic, nutritional, environmental and medicinal point of view
Please be correct answer, and if you do not know not with this!
Answer:
Plants are extremely important in the lives of people throughout the world. People depend upon plants to satisfy such basic human needs as food, clothing, shelter, and health care. These needs are growing rapidly because of a growing world population, increasing incomes, and urbanization .
Plants provide food directly, of course, and also feed livestock that is then consumed itself. In addition, plants provide the raw materials for many types of pharmaceuticals, as well as tobacco, coffee, alcohol, and other drugs. The fiber industry depends heavily on the products of cotton, and the lumber products industry relies on wood from a wide variety of trees (wood fuel is used primarily in rural areas). Approximately 2.5 billion people in the world still rely on subsistence farming to satisfy their basic needs, while the rest are tied into increasingly complex production and distribution systems to provide food, fiber, fuel, and other plant-derived commodities .
Medicinal plants have been used in healthcare since time immemorial. Studies have been carried out globally to verify their efficacy and some of the findings have led to the production of plant-based medicines. The global market value of medicinal plant products exceeds $100 billion per annum. This paper discusses the role, contributions and usefulness of medicinal plants in tackling the diseases of public health importance, with particular emphasis on the current strategic approaches to disease prevention. A comparison is drawn between the ‘whole population’ and ‘high-risk’ strategies. The usefulness of the common-factor approach as a method of engaging other health promoters in propagating the ideals of medicinal plants is highlighted.
Can you guys help me?
Answer:
first one is active transport sorry cant help with the rest
Explanation:
SCIENCE
Why is the nervous system in the human body a system?
A. It is made of tissues that can conduct electricity, a required function in a system.
B. Like all systems, the nervous system is contained within a living organism.
C. It is made of several components that act interdependently to perform a function as a whole.
D. The nervous system acts together with other systems to control a larger organism
Answer:
The nervous system acts together with other systems to control a larger organism.
Explanation:
Moreover, it is formed by organs which are also formed by specific tissues.
Answer: C ( it is made of several components that act interdependently to perform a function as a whole)
Explanation: It's C because I took it for summer school and I got it correct (score: 3/3) : )