Answer:
decrease, decrease
Explanation:
By using antimalarial drugs in order to prevent malaria, the frequency of the sickle cell allele decreases in both areas where malaria is endemic and the areas where no incidence of malaria occurs because there is no necessity of sickle cell allele in the population to prevent malarial disease. Sickle cells have high significance in prevention of malarial diseases so when there is no malaria happens in the population so there is no need for it and the allele slowly removed from the population and decrease occurs in its frequency.
How can humans use mutations to produce traits we want?
Answer:
mutations can affect an organism by changing its physical characteristics (or phenotype) or it can impact the way dna codes the genetic information (genotype). when mutations occur they can cause termination (death) of an organism or they can be partially lethal.
good luck :)
hopefully, this helps
have a great day !!
Come to this question for BIG POINTS!!!!! Hey this is a review but counts a lot of my average. NOT A TEST!!! On mastery connect genetics so if you have Mastery connect check on there. Ignore any answers on there NOT my real answer just a random one. No links(I am prepared to sue) No unhelpful answers ( Prepared to email) only answer if you think you are 100% right.
what are atoms and what is the connection between atoms, elements and matter?
Answer:
Atoms are the smallest indivisible part of an element that can neither be created nor destroyed in a chemical reaction.
Answer:
an atom the part of an element. a particular element is composed of only one type of atom. Atoms are further composed of subatomic particles called electrons, protons, and neutrons. elements can combine with each other to form molecules via chemical.
Explanation:
The production of egg and sperm cells follows a certain sequence of events.
Which example lists those events in the correct order?
fertilization, meiosis, cell differentiation
meiosis, cell differentiation, mature gametes
sexual reproduction, cell differentiation, mitosis
cell differentiation, meiosis, sexual reproduction
HELP I'LL GIVE BRAINLIEST DUE BY 11:59!!!!!!!
I FELL BEHIND AND I NEED TO GET THIS DONE!!!!!!
ACCESS 2021 AP BIOLOGY
If purple flowers are dominant to white flowers, and a heterozygous purple flower is crossed with a white flower, what is the probability that an offspring will be white? (Hint: draw a Punnett Square). Rr x rr *
50%
25%
100%
75%
which one^
when the phenotype is2:2 the 50%is white
The correct answer to the given quested about Heterozygous genotype is 50 percent.
How to solve this question?Considering a hybrid of two plants that are heterozygous for purple blooms as the are dominant to white flowers.Purple Heterozygote (Pp) X Purple Heterozygote (Pp)Each plant will generate two different types of gametes, with 50% of them having the (P) allele and 50% bearing the (p) allele.Check the alleles and demonstrate the genetic cross when the purple flower is crossed with the full one.Thus the conclusion is that there is a chance that when two plants with heterozygous purple flowers are crossed, 50% of the offsprings will have purple flowers and 50% will have white flowers.
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what would you make if you added CO2, water and energy
Answer:
You can react it with water to produce energy-rich hydrogen gas, or with hydrogen to produce useful chemicals, such as hydrocarbons or alcohols. If there were a sustainable, cost-efficient route to transform CO2 to CO, it would benefit society greatly.
Explanation:
How are DNA and chromosomes related?
A chromosone is a long DNA molecule
Why can even small oil spills have a serious impact
Oil spills frequently kill marine mammals such as whales, dolphins, seals, and sea otters. ... Oil coats fur of otters and seals, leaving them vulnerable to hypothermia. Even when marine mammals escape the immediate effects, an oil spill can contaminate their food supply.
Answer:
in the simplest terms possible, a small oil spill can drip into stormdrains and then it flows to rivers and bays/oceans then contaminating what water and poisoning the wildlife and plants there
Consider the evidence that explains how physical separation of two populations of a species can cause speciation. What effect does physical separation have on organisms that might result in speciation?
Answer:
Interruption in the genetic flow between separated groupsThe emergence of new mutations in each of the groups, and their accumulation in time. Slow and gradual differentiation between populations. Genetic divergence by natural selection and reproductive isolation Prezigotic isolation mechanismsExplanation:
Allopatric speciation consists of the geographic separation of a continuous genetic background that can give place to two or more new geographically isolated populations. These separations might be due to migration, extinction of geographically intermediate populations, or geological events. In this speciation, some barriers impede genetic interchange, or genetic flux, as the two new groups that are separated can not get together and mate anymore. These barriers might be geographical or ecological.
The process of allopatric speciation involves different steps that affect organisms:
The emergence of the barrier. Interruption in the genetic interchangeThe occurrence of new mutations and their accumulation in time in each population. Slow and gradual differentiation. Genetic divergence by natural selection and reproductive isolation makes it impossible for the two groups to mate even if the barrier disappears. Prezigotic isolation mechanisms will be favored by selection if occurs a secondary contact between the new species in formation.Hi anyone know what is ___________________
Answer:
___________ what is this?
Explanation:
HELP PLEASE THIS IS DUE TODAY.
BIOLOGY
Given that s ⊥ t and r ⊥ t, what conclusion can be made?
s ∥ r
s ∥ t
t ∥ r
r ⊥ s
Answer:
s ∥ r
Explanation:
Which of the following is NOT part of the cell theory?
a. All living things are made up of cells
b. All cells must have a cell membrane, cytoplasm, DNA, and ribosomes
c. The cell is the basic unit of Structure and Function in living things
d. All new cell must come from preexisting cells
Answer:
B. All cells must have a cell membrane, cytoplasm, DNA, and ribosomes. I hope it helps :)
the name of the layer in witch earths weather occurs
Answer:
Earth's crust :))))))))))
match the following
(i) Stem tuber (a) minerals
(ii) Conditioned Reflex (b) Blue green algae
(iii) Blood Circulation (c) potato
(iv) Pancreas (d) chlorosis
(v) Autotrophs (e) Pavlov's Experiment
(vi) Active transport (f) Insulin
(g) William Harvey
Answer:
Stem tuber ---- Potato
Conditioned reflex ---- Pavlov's experiment
Blood circulation ---- William harvey
Pancreas ---- Insulin
Autotrophs ------ Blue green algae
Active transport ---- Minerals
Note: Chlorosis has no matching item in the list. Explanation is given below.
Explanation:
Stem tubers are plants which store their food in their stems. Potatoes are stem tubers.
Conditioned reflex is a reflex is acquired gradually by training in association with specific repeated external stimuli. For example, the Russian psychologist Ivan Pavlov's performed experiments on conditioned reflex using a dog. He demonstrated that a dog will salivate on the sound of a bell even if there is no food given to it if the ringing of the bell preceded every feeding session of the dog.
William Harvey discovered the circulation of blood and the function of the heart .
The islets of Langerhans found in the Pancreas secretes the hormone, insulin.
Autotrophs are organisms which are able to manufacture their own food, Blue green algae are examples of autotrophs.
Active transport is transport which requires expenditure of energy and occurs against the concentration gradient of the substance being transported. Because the concentration of minerals in the soil are in very low concentration, active transport is used by the root hair cells carrier proteins to move mineral ions across the membrane into the cell against the concentration gradient. ATP hydrolysis provides the energy for this process.
Chlorosis is a disease which appears as the yellowing of leaves in plants and in human a green tinging of the skin which is caused by the deficiency of minerals especially iron and manganese.
PLSS HELP!!
What type of succession starts with some soil but then goes through the 10p
steps of succession?
A. Primary Succession
B. Secondary Succession
C. Climax Community
Explanation:
Ecological succession is the process of change in the species structure of an ecological community over time. The time scale can be decades (for example, after a wildfire), or even millions of years after a mass extinction.[1]
Succession after disturbance: a boreal forest one year (left) and two years (right) after a wildfire.
The community begins with relatively few pioneering plants and animals and develops through increasing complexity until it becomes stable or self-perpetuating as a climax community. The "engine" of succession, the cause of ecosystem change, is the impact of established organisms upon their own environments. A consequence of living is the sometimes subtle and sometimes overt alteration of one's own environment.[2]
It is a phenomenon or process by which an ecological community undergoes more or less orderly and predictable changes following a disturbance or the initial colonization of a new habitat. Succession may be initiated either by formation of new, unoccupied habitat, such as from a lava flow or a severe landslide, or by some form of disturbance of a community, such as from a fire, severe windthrow, or logging. Succession that begins in new habitats, uninfluenced by pre-existing communities is called primary succession, whereas succession that follows disruption of a pre-existing community is called secondary succession.
Succession was among the first theories advanced in ecology. Ecological succession was first documented in the Indiana Dunes of Northwest Indiana and remains at the core of much ecological science.[3]
Which of these statements about budding is FALSE?
PLEASE HELP I WILL GIVE BRAINLIEST
A: The new cell is the same size as the parent cell when it breaks away.
B: Yeast is an example of an organism that reproduces through budding.
C: The nucleus of the parent cell divides, providing an identical nucleus to the new cell.
D: It is a form of asexual reproduction.
Answer:
A is false
Explanation:
Cells typically respond to DNA damage in three ways: by ceasing to grow and divide until the damage is repaired, by permanently ceasing to grow and divide, or by dying. In 2010 a group of scientists reported that a certain kind of immune reaction can cause DNA damage that leads to a fourth response. DNA damage can turn off genes involved in cell-signaling pathways. Turning off these genes can cause less-mature cells to divide too rapidly, often leading to the development of- a. tumors c. hemophilia b. allergies d. cardiovascular disease
It can lead to the development of A. Tumors
Turning off these genes can cause less-mature cells to divide too rapidly, often leading to the development of (A) tumors.
What is the most common cause of tumor?
When cells reach their end of life cycle or get damaged, they pass away and are replaced by new ones. This normally well-regulated process can, on occasion, become disorganized, allowing aberrant or damaged cells to proliferate and reproduce when they should not. These cells have the potential to develop tumors, which are mass accumulations of tissue.
There are primarily three different kinds of tumors:
Benign: These tumors do not have any cancer-causing properties. They do not penetrate the tissue that is close by and they do not spread to other areas of the body.Tumors that are premalignant have cells that are not currently cancerous but have the capability of developing into cancerous cells in the future.Malignant: Malignant tumors are malignant.Learn more about tumors, here:
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How is binary fission in prokaryotic organisms similar to and different from mitosis and cytokinesis in single-celled eukaryotic organisms?
Plzz Help so confused. due today !!!!
Answer:
In binary fission the organism divides itself into two through the nucleus and in mitosis, the parent cell divides into two daughter cells
Your best friend is concerned about a mole on her arm. Knowing that you are taking a biology class she comes to you and asks for your opinion. You take a sample of her mole and view it under a microscope. While counting a selection of 300 cells, you notice that 87 cells are actively undergoing mitosis. Should your friend be concerned?
Answer:
She should consult a dermatologist immediately.
Explanation:
When doing preemptive diagnosis of a mole, one should compute the Mitotic Rate (MR) - and the MR reported in the question is way above the highest category "greater than 4 per square millimeter" (to compare. there's around 2000 cells per sqmm of skin, so we're at over 500 per square millimeter).
A biology teacher asks students to give examples of genetic variations that support the idea that changes in a population’s environment affect genetic variation. Which is the least supportive example?
A. changes in genetics in human populations
B. antibiotic resistance in bacteria populations
C. pesticide resistance in garden insects
D. changes in the color of the peppered moth population in England
SOMEONE PLEASE HELP ME WITH THIS ILL GIVE YOU BRAINLY IF U GET IT RIGHT ALSO EXPLAIN HOW U GOT THE ANSWER PLEASE!!!!!
Answer:
D. A mutualism relationship, because the fungus and algae both benefit from the relationship
Explanation:
The reason it's D is because a mutualism relationship means that both organisisms benefit from the relationship. Explained in the question, the fungus obtains the resources that the algae uses to make them both food.
cohesion is a property water.Which of the following is NOT an example of cohesion
a.water is attracted to the sides of a glass cylinder
b.water strider can walk on water
c.water forming a drop on a penny
d.water molecules are attracted to each other
Answer:
A po kasi nga kapag ang tubig ay naisalin sa isang baso minsan ang tubig ay dumidikit sa baso tama diba kaya naman ang sagot ay A baka naman brainliest naman jan:)
Water is attracted to the sides of a glass cylinder is an example of cohesion.
What do you mean by cohesion?Cohesion means sticking together. If your group of friends heads to the lunchroom as a team and sits all together, you're demonstrating strong cohesion.
Cohesion allows for the development of surface tension, the capacity of a substance to withstand being ruptured when placed under tension or stress.
Cohesion refers to the attraction of molecules for other molecules of the same kind, and water molecules have strong cohesive forces thanks to their ability to form hydrogen bonds with one another.
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Please don't post invalid question please..!!
What is Science??
Answer:
please mark me as brainliest
Answer: Good Morning
Science is the intellectual and practical activity encompassing the systematic study of the structure and behaviour of the physical and natural world through observation and experiment.The three main types of science are: physical science, Earth science, and life science. Physical science is the study of inanimate natural objects and the laws that govern them. It includes physics, chemistry and astronomy
Explanation:
Hope it helps! Have a good day
Why are enzymes important for chemical
reactions?
Answer:
Enzymes greatly increase the reaction rate, or catalyze them.
Explanation:
Without them, many of us would not be alive, because the reactions wouldn't be fast enough!
If a forest has many large trees with lots of leaves, what will most likely be found on the ground?
A. Very few small plants, because the trees block all the sunlight.
B. Lots of small plants, because the big trees provide more oxygen.
C. Very few small plants. because the trees use up all the oxygen.
D. Lots of small plants, because the trees provide enough water.
(I'm in 5th grade btw, and I have a big test coming up so this could really help)
Answer:
A.....
Explanation:
,.............
If a forest has many large trees with lots of leaves, the likely thing that could be found on the ground is very few small plants, because the trees block all the sunlight. Thus, the correct option for this question is A.
Why do plants that live on the forest floor have big leaves?The forest floor gets almost no light at all. Leaves in these environments have adapted to low light and lots of water. Large leaves are arranged horizontally to absorb the most light possible. This is because these plants have plenty of access to water, and they can keep large leaves alive.
The plants that live on the floor of the forest have bigger leaves so that they can absorb the little light that comes through rather the plants that live in hot sunny conditions don't need to store as much sunlight. Cacti are plants that live in extremely dry environments.
Therefore, if a forest has many large trees with lots of leaves, very few small plants would be found on the ground because all the trees block the sunlight. Thus, the correct option for this question is A.
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Explain how the structure of a plant allows it to obtain and keep water.
Answer:
Most plants absorb water through the roots. Land plants get almost all the water they need from the soil. The amount of water available in the soil varies according to its porosity and its degree of desiccation. A large proportion of water is retained by cohesion forces between the particles. When the water is in the roots it moves inside the plant through the xylem. The xylem is the transport system that carries water to the entire plant.
Explanation:
The xylem connects all parts of the plants (from the roots to the stems and from there to the leaves). The water in the xylem creates a gigantic chain of molecules that adhere to each other, just like they adhere to the xylem. For plants to transport water from roots to leaves and use it in other functions, other structures called stomata are required. Stomata are small pores in leaves that plants can open and close as needed. If they open, the water moves out of the stomata and evaporates into the air. This occurs because the water molecules diffuse, from the humid air inside the leaf, to the much drier air surrounding the leaf. The loss of water through the stomata together with the high cohesion of the water particles and the resistance of the root "stress" the water column. This causes the water potential of the roots to decrease and the surrounding water enters the plant.Each stoma is made up of two occlusive cells. When these cells are turgid, a hole opens between them; when the cells relax, the hole disappears. The turgor pressure depends directly on the inlet or outlet of the water. This movement, in turn, depends on the concentration of solutes within the cell.
Which of the following best explains what happens to the water that is expelled by photosynthesis?
The water is a toxic waste product and is usually accidentally consumed by animals.
The water remains on the plant until it is consumed or converted into a different form.
The water stays inside the plant and is used as energy to rehydrate the plant.
The water gets released into the soil and is broken down in hydrogen and oxygen.
Answer:
The water stays inside the plant and is used to rehydrate the plant
Explanation:
Which statement best describes the function of the human body system in the above diagram?
a
Produces and secretes hormones which regulate metabolism, growth, and development
b
Provides support and movement for the body
c
Breaks down food into nutrients and wastes
d
Supplies oxygen to blood and removes carbon dioxide from blood
Suministra oxígeno a la sangre y elimina el dióxido de carbono de la sangre