Based on the information in the graph, what is the best conclusion to draw
about Africa?
World Population Growth
20,000
10,000
World
5,000
Asia
2,000
Africa
1,000
Europe
WANIA
500
200
100
United States,
Canada, and Greenland
Mexico,
Central America, Caribbean Islands,
and South America
Oceania (Australia and
nearby islands in the Pacific)
50
20
10
1950
1960
1970
A. The fertility rate is very low.
1980
1990
2000
2010
2020
2030
2040
2050
B. It has reached its carrying capacity.
C. The birthrate is higher than the death rate.
oc
D. It has few resources.

Answer:

Isaac Newton

Explanation:

Isaac Newton discovered that white light is a spectrum of seven colour rays.

Answer:

Ethylene is a plant hormone that is released in the form of gas. It stimulates plant cells degradation making the fruits softer and sweeter. As a result, high ethylene levels may cause fruits over-ripening and abscission.

Explanation:

Answer: Birds are exposed to insecticides through ingestion by mistaking, they ingest pesticide residues when they trim their feathers with their beaks or may drink or bathe in contaminated water. The effects can range from death due to poisoning to a variety of effects such as weakening of eggshells, deformation and slow growth of chicks, lack of appetite, weight loss, immune system damage, hormonal disruption. In addition, insect-eating birds are at a loss when insecticides cause a drop in the number of insects available, especially when they have chicks to feed.

Explanation:

Insects are a class of invertebrate animals characterized by having one pair of antennae, three pairs of legs and two pairs of wings (which, however, may be reduced or missing). They comprise the most diverse group of animals on Earth with an estimated thirty million undescribed species, potentially representing more than 90% of the life forms on the planet. Moreover, they can be found in almost every environment on the planet, so they are not only highly diverse, but also incredibly abundant.

Like any species on the planet, insects play a vital role in the ecosystem, so that a change in the population can compromise the survival of everything around them. On the other hand, insects called "pests" are those insects observed in systems and whose populations cause damage to crops. Although both beneficial insects and pest insects are part of any ecosystem and are also present in human-managed systems. Humans combat these pests using insecticides, which are chemical compounds used to kill insects. They are usually very specific since the product only affects the organism it damages, leaving the rest of living beings and the environment unharmed. And they have low toxicity to humans and animals.

The most common way in which birds are exposed to insecticides is through ingestion by mistaking, for example, a pesticide granule for a seed, or indirectly, by consuming contaminated prey (insects). Birds may also ingest pesticide residues when they trim their feathers with their beaks or may drink or bathe in contaminated water. It should be noted that it also depends on the toxicity of the chemicals, the magnitude and duration of exposure. The effects can range from death due to poisoning to a variety of effects such as weakening of eggshells, deformation and slow growth of chicks, lack of appetite, weight loss, immune system damage, hormonal disruption. In addition, insect-eating birds are at a loss when insecticides cause a drop in the number of insects available, especially when they have chicks to feed.

Cystic fibrosis is an autosomal recessive condition caused by a mutation in the CFTR gene that alters Cl- and Na+ transport, leading to excesive mucus accumulation in aerial and digestive tracts.

Cystic fibrosis is an autosomal recessive condition in which the mutation of a diallelic CFTR gene that codes for the channel CFTR  protein (cystic fibrosis transmembrane conductance regulator) is responsible for the affection.

The CFTR protein expresses in the luminal portion of the secretory and absorptive epithelial membranes, and it is involved in Cl- and Na+ transport.

Given that defects in the CFTR protein take to a defective regulation in the Na+ channel, cystic fibrosis characterizes by alterations in electrolytes secretions and absorption. There are two significant physiopathological mechanisms:

1) altered Cl- secretion in submucous glands,

2) increased Na+ absorption and consequent electrolytes hyperabsorption in the superficial epithelium.

Patients with cystic fibrosis are incapable of increasing their secretory transport. On the contrary, the increased epithelial Na+ conductance and the altered permeability to Cl- and water lead to hyperabsorption in the patient epitheliums.

The superficial liquid layer in the aerial vias decreases, mucus is not released from mucous glands, and the mucociliary clearance is strongly altered in aerial vias. Mucus accumulates in the lungs, digestive tract, and other areas.

Most people have two copies of the normal allele (h0m0zyg0us dominant genotype)and produce the functional CFTR protein form.

Patients with cystic fibrosis have two copies of the mutated allele (h0m0zyg0us recessive genotype), producing the protein's mutated and dysfunctional form.

Heter0zyg0us people possess only one normal CFTR allele and a mutated form of the same gene. These alleles are codominant, meaning that noth of them are expressed. They can produce a normal protein and a mutated protein.

Given that the normal allele produces enough functional CFTR protein, these individuals do not have any adverse effects, and the mutated allele is recessive at a physiological level.

To sum up, Cystic fibrosis is an autosomal recessive condition -not sex-linked- that causes the unfunctional form of the CFTR protein,  and alters Cl- and Na+ transport. Consequently, there is an accumulation of mucus in the respiratory and digestive tract, among other organs, that might be lethal.

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convention is your answer

Answer:

The answer is Cccc Latex

the answer is bbbbb grass

Answer:

Mendel was interested in the offspring of two different parent plants, so he had to prevent self-pollination. He removed the anthers from the flowers of some of the plants in his experiments. Then he pollinated them by hand with pollen from other parent plants of his choice.

Mendel controlled which plants were being pollinated by using artificial cross-pollination. Details about Mendel experiment can be found below.

Gregor Mendel is referred to as the Father or Genetics because of his immense role in inheritance.

Gregor Mendel performed series of experiment using pea plants where he crossed them to observe the inheritance of several traits.

However, Gregor Mendel was able to control the process of self-pollination among the pea plants he used by employing artificial cross pollination.

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Answer:

According to the U.S. Department of Agriculture, you should consume the highest proportion of your foods from the grain group. However, you should consume almost as many portions from the vegetable group; fill your plate a little over one-fourth full with grains and add almost the same amount of vegetables.

Explanation:

Answer: I have no idea

Explanation: This question does not have enough information for me to answer it.

Answer: C. Histologist

Explanation:

A cell biologist refers to a person who studies cells and their functions and their interactions with the biological organisms.

A taxonomist refers to a biologist who classifies organisms into their categories.

A histologist, can also be called a histotechnician, and this is someone who prepares tissue samples for the pathologist to study. A histologist cut samples from organs which are used for microscopic tissue analysis.

Palaeontologist is a person who studies fossils in order to get information regarding life on Earth.

Answer:

because it helps alot

Explanation:

1.it protect you from sicks and diseases

2. it helps one feel comfortable

Answer:

basophils

Explanation:

Basophils are a class of white blood cells known as granulocyte, which also include neutrophils, eosinophils, and mast cells. These cells (basophils) are generated in the bone marrow as other white blood cells. When stimulated, basophils degranulate to release histamine, proteoglycans, and proteolytic enzymes and thus mediate immune responses. This process of degranulation occurs when a specific antigen binds to the IgE receptor on the basophil. Moreover, basophils may also be activated by inflammatory mediators (e.g., complement factors such as C5a and C3a, chemokines, etc).

Answer:

B Edge 2021

Explanation:

I just took the test

When a sperm fertilizes an egg, the fertilized egg, also known as a zygote, will travel from the fallopian tube to the uterus, where it will implant and grow into a fetus. Therefore, the correct option is B.

A fertilized egg is also known as a zygote. It is a single cell that results from the union of a sperm and an egg during fertilization. Fertilization typically occurs in the fallopian tube of a female reproductive system when a sperm successfully penetrates and merges with the egg.

The egg is released from the ovary and travels through the fallopian tubes towards the uterus. It is in the fallopian tubes where the egg can be fertilized by a sperm, forming a zygote.

The zygote will then continue to travel through the fallopian tube towards the uterus. As it approaches the uterus, the zygote will undergo several cell divisions, forming a ball of cells known as a blastocyst.

The blastocyst will then implant into the lining of the uterus, where it will continue to grow and develop into a fetus. The cervix, which is the lower part of the uterus, plays a role in pregnancy by keeping the fetus inside the uterus during gestation and then opening to allow for delivery during childbirth.

Therefore, option B) the fallopian tubes and uterus is correct.

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Answer:

Acute diseases refer to the medical condition that occurs suddenly and lasts for a shorter period of time. Chronic diseases develop slowly in our body and may last for a lifetime. Chronic diseases are sometimes fatal.

Answer:

Well, here is your answer...

Explanation:

I am really sorry because I have to search other website for answering this question because I am not in the same grade which you are in... SORRY DEAR !!!

Answer:

is expressed roughly equally in both sporulating and nonsporulating yeast

Explanation:

A DNA microarray (also called DNA chip) is a microchip-based testing platform which can be used to analyze and compare gene expression profiles between samples. A DNA microarray contains microscopic DNA spots attached to a solid surface, where each spot corresponds to thousands of copies of a specific DNA sequence (i.e., probes). Subsequently, cDNA 'target' molecules obtained by reverse transcription from RNA are then hybridized to a microarray. This process of hybridization can be quantified by using fluorophore-labeled targets that determine the level of the expressed gene (transcript) in the target sample. In a DNA microarray, the intensity and types of color in each spot indicate the presence and level of each specific transcribed gene in the samples. In consequence, the presence of yellow spots in the DNA microarray indicates approximately equal expression levels of the corresponding gene in both yeast samples.

Answer:

This is because predators will find the easiest meals to snack on, even if that includes hunting down endangered or vulnerable species they're supposed to protect.

Explanation:

An example would be the Hawaiian mongoose case. If you don't know, mongoose are very popular due to their brave and aggressive nature, where they'll hunt pests down from rats eating on crop fields to even giant snakes in India that would other wise kill humans in a single venomous bite. This brought up the idea of bringing mongoose to Hawaii, since some rats were being a problem with their agriculture. So they brought 72 of them and started breeding them.

This immediately backfired as they caused many native birds and other native animals trouble as they were eating its eggs. There were so few mongoose hunting down the rats that it was rather better for them to not bring it in the first place. This is why today, Hawaii is very strict on what animal you choose to bring, even your own dog!

Another example would be the Australian dingoes. Except, this was unintentional. A few thousand years ago, their once-domesticated dog ancestors were actually abandoned by their owners from some Southeast Asian area and came down to Australia. They outcompeted existing predators such as the Tasmanian devils on Australia. They simply could produce and maintain more offspring than the Tasmanian devils. This caused the extinction of the last Tasmanian devils in the last couple of decades.

Although the dingoes aren't as bad as the mongoose, who ate everything they could find, as they hunted feral pigs as well as rare hunts on feral cats, they also eat the threatened native species they're meant to protect.

Last and very good example would be New Zealand, home to the most vulnerable birds: Kiwis and Kakapos. Although the taxonomy shows that they have individually evolved flightlessness, they both are vulnerable species. This is because, similar to the dodos, they didn't have predators to begin with. And you can't have a predator to attack the existing invasive species since they'll just snack up on the flightless birds as they're an easier snack anyways.

The more an ecosystem has been isolated, the harder it is to restore balance once invasive species have been introduced. Predators will not hesitate to try new food, such as kiwis. Think about it, if you walk into a pastry and see a new type of cake on display, you might as well give it a go. Predators are just too unpredictable that it's best to leave an ecosystem alone.

Answer:

1.5mm

Explanation:

According to this question, Mary is trying to view 5 pollen grains under her microscope. She found out that the 5 pollen grains each with a diameter of 0.3mm could fit along the diameter of the field of view of her microscope.

This means that the diameter of the field of view of Mary's microscope can be calculated as follows:

Diameter of each pollen × no. of pollen that fit in

= 0.3mm × 5

= 1.5mm

Hence, the diameter of the field of view of Mary's microscope is 1.5mm.

Hello user,

The answer is Protein Energy Malnutrition ( PEM )

hope it helps you ...

Answer:ribosome uses the sequence of codons in mRNA to assemble amino acids into a polypeptide chain

Explanation:

Answer:

i dont know

Explanation:

because i hane never see that question

Answer:

k

Explanation:

Answer:

I think option (A) is right answer

Answer:

sry I don't know but need more points

Explanation:

I surely answer yr next question

Answer:

cc) cristae respond to angular acceleration and deceleration.

Explanation:

The vestibular system is the sensory apparatus of the inner ear that acts to maintain body equilibrium, as well as to coordinate the position of the head and eye movement. The vestibular system consists of five distinct sensory organs: three semicircular canals (i.e., anterior, posterior, and lateral) which are involved in dynamic equilibrium; and the two otoliths (i.e., utricle and saccule), involved in static equilibrium. The crista ampullary (​plural: cristae) is the sensory organ located in the semicircular canals of the inner ear of vertebrates, which act to detect angular acceleration and deceleration. The cristae of the semicircular canals respond to the rotational movement and are responsible for dynamic equilibrium.

Answer: it is b

Explanation:I DID THIS TEST

Answer:

A. local signaling

Explanation:

Answer:

algae. I just looked it up. algae are autotrophs meaning they make their own food. I hope this helps!

Answer:

algae is your answer

Explanation:

hope help yiu

Complete Question:

1. Organisms don’t all reproduce the same way. However, by comparing the ____ of these organisms, many similarities between them are ____

2. of these organisms, many similarities between them are revealed. These similarities suggest that they’re ___ linked. This type of study is called developmental biology.

Group of answer choices.

A) Cells B) Embryos C) Mode of reproduction D) Evolutionarily. E). Revealed.

Answer:

embryo; revealed; evolutionarily.

Explanation:

Reproduction can be defined as a biological process which typically involves living organisms producing an offspring.

Basically, there are two (2) methods of reproduction and these are;

I. Asexual reproduction: it involves the cloning of a living organism to produce an offspring because there is only a single parent.

II. Sexual reproduction: it involves the combination of the genome (gamete) of a male and female living organism during fertilization.

It's a fact that all living organisms do not reproduce the same way.

However, by comparing the embryo of these organisms, many similarities between them are revealed. These similarities suggest that they’re evolutionarily linked.

Hence, we refer to this type of study as developmental biology