Answer: Vagovagal reflex control circuits in the dorsal vagal complex of the brain stem provide overall coordination of gastric, small intestinal, and pancreatic digestive functions.
Explanation:
Several types of ___________ live in our mouth and are part of a sticky substance called plaque. Improper brushing causes plaque build-up, or tartar, and will eventually cause tooth decay.
Answer:
Germs
Explanation:
Plague is a type of germ, therefore the word would best fit the blank
hope this helps :)
What is the advantage for birds of not having a bladder?
Answer:
Explanation:
The urinary bladder is a flexible sac that can expand and contract and that holds urine.
Urea is excreted mainly by birds and it happens to be the main chemical in urine, without the water in it, the birds excrete just solid droppings instead of as a liquid.
Now, birds physiology is such that they have only one opening to get rid of their (solid) waste and they do not have a bladder.
What are the 5 main sinks of carbon
Answer:
bio, pedosphere, litho, hydro, a t m o
Explanation:
sphere
2 Paragraph summery on how Anna Garcia died
Answer:
skvnewv
Explanation:
hbcjabvjkabhsAnswer:
skvnewv
Explanation:
hbcjabvjkabhsAnswer:
skvnewv
Explanation:
hbcjabvjkabhsAnswer:
skvnewv
Explanation:
hbcjabvjkabhsAnswer:
skvnewv
Explanation:
hbcjabvjkabhsAnswer:
skvnewv
Explanation:
hbcjabvjkabhsAnswer:
skvnewv
Explanation:
hbcjabvjkabhs
Which of the following occurs during artificial cross pollination? A. A different plant species is used to pollinate another plant. B. The plants reproduce sexually by self pollination. C. The scientist completely controls the transfer of pollen from one flower to the stigma of another.
Answer:
c
Explanation:
its artificial= done by humans
During artificial cross-pollination, the scientist completely controls the transfer of pollen from one flower to the stigma of another.
What do you mean by Cross-pollination?Cross-pollination may be defined as a type of pollination in which sperm-laden pollen grains are transferred from the cones or flowers of one plant to egg-bearing cones or flowers of another.
Any artificial thing requires the interference of human activity. This activity by human increase the chance of those who give better productivity in every aspect.
Therefore, during artificial cross-pollination, the scientist completely controls the transfer of pollen from one flower to the stigma of another.
To learn more about artificial cross-pollination, refer to the link:
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22. A plant geneticist is investigating the inheritance of genes for bitter taste (Su) and explosive rind (e) in watermelon (Citrullus lanatus). The explosive rind is recessive and causes watermelons to burst when cut. Non-bitter watermelons are a result of the recessive genotype (susu). The geneticist wishes to determine if the genes assort independently. She performs a testcross between a bitter/nonexplosive hybrid and a plant homozygous recessive for both traits. The following offspring are produced:
Bitter/nonexplosive 88
Bitter/explosive 62
Non-bitter/non-explosive 62
Non-bitter/explosive 81
Calculate the chi-square value and also the chi-square of independence for the null hypothesis that the two genes assort independently. Calculate using a chi-square test and the chi-square test of independence. Give your answer to the nearest tenth.
Answer:
See the answer below
Explanation:
Using the formula for calculating Chi square ([tex]X^2[/tex]):
[tex]X^2[/tex] = [tex]\frac{(O - E)^2}{E}[/tex] where O = observed frequency and E = expected frequency.
The observed frequencies for the four phenotypes are 88, 62, 62, and 81 respectively.
For the expected frequency, the phenotypes are supposed to assort in 9:3:3:1 according to Mendel ratio.
Hence, expected frequencies are calculated as:
phenotype (1) = 9/16 x 293 = 164.81
phenotype (2) = 3/16 x 293 = 54.94
phenotype (3) = 3/16 x 293 = 54.94
phenotype (4) = 1/16 x 293 = 18.31
The [tex]X^2[/tex] is calculated thus:
Phenotype O E [tex]X^2[/tex]
1 88 164.81 [tex]\frac{(88 - 164.81)^2}{164.81}[/tex] = 35.80
2 62 54.94 [tex]\frac{(62 - 54.94)^2}{54.94}[/tex] = 0.91
3 62 54.94 [tex]\frac{(62 - 54.94)^2}{54.94}[/tex] = 0.91
4 81 18.31 [tex]\frac{(81 - 18.31)^2}{18.31}[/tex] = 214.64
Total [tex]X^2[/tex] = 35.80 + 0.91 + 0.91 + 214.64 = 252.26
To the nearest tenth = 252
Degree of freedom = n - 1 = 4- 1 = 3
[tex]X^2[/tex] tabulated = 7.815
The calculated [tex]X^2[/tex] exceeds the critical value, hence, the null hypothesis is rejected. The two genes did not assort independently.
Which of these are characteristics of reptiles? Check all that apply.
They undergo internal fertilization.
Their urine is concentrated.
They use their skin for gas exchange.
They have two-chambered hearts.
They are covered in scales.
the answer is a,b and e
Reptiles are a class of vertebrates made up mostly of snakes, turtles, lizards, and crocodilians. The options (A), (B) and (E) are correct.
What are the characteristics of reptiles?Reptiles, as most commonly defined are the animals in the class Reptilia, a paraphyletic grouping comprising all sauropsids except birds. Living reptiles comprise turtles, crocodilians, squamates and rhynchocephalians.
Moreover, the major groups of living reptiles—the turtles (order Testudines), tuatara (order Rhynchocephalia [Sphenodontida]), lizards and snakes (order Squamata), and crocodiles (order Crocodylia, or Crocodilia)—account for over 8,700 species.
Therefore, the name "reptile" comes from Latin and means "one who creeps". All living reptile species are cold blooded, have scaly skin, and lay cleidoic eggs. They excrete uric acid (instead of urea), and have a cloaca. A cloaca is a shared opening for the anus, urinary tract and reproductive ducts.
Learn more about reptiles:
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If a water well is actively pumped, the water table will *
O be raised around the well
O stay at the same level as before pumping
O be depressed around the well
O be recharged
Which word or phrase below is defined by the following:
A relationship between two organisms in which one organism hunts the other.
Consumer
Predation
Producer
Decomposer
Answer
Predator
Explanation:
Answer: Predation
Explanation:
In predation, one organism, the predator, kills and eats another organism. (Predators hunt)
Which of the following is an old-world of evolution and no longer valid?
Answer:
Where are the answers?
Explanation:
). You are studying an allele T that governs parasite resistance in a large population of gazelles. You observe that different combinations of T and t produce phenotypes that have different fitnesses due to differences in parasite resistance. The fitness of TT is 0.30, the fitness of Tt is 0.32, while the fitness of tt is 0.34. The T allele starts at a frequency of 0.70, while t starts at a frequency of 0.3. i. Assuming Hardy-Weinberg equilibrium except for selection, what will the frequency of T be in the next generation
Answer:
The New Allelic frequency of the T allele in the next generation is 0.6865
Explanation:
In the attached file you will find the resolved problem.
You will probably need the definitions of the following terms:
Initial allelic frequency: (number of homozygote individuals + half number of heterozygote individuals) / Total number of individuals Relative contribution of each genotype: Zygote frequency x Relative aptitude Average aptitude W: It is the sum of relative contribution of each genotype to the next generation.WTT x p2 + WTt x 2 x p x q + Wtt x q2
Population Genotype frequency: Relative contribution of each genotype / Average aptitude Allelic frequency: Homozygote population genotype frequency + half heterozygote population genotype frequencyA front refers to?HURRY
Answer:
A. Where to air masses meet
Explanation:
Answer:
A. the location where two air masses meet.
Explanation:
What is the term for a plant that produces a seed without a protective cover
Gymnosperms are a more primitive, smaller category of plants that generate "bare seeds" (seeds that are not protected by a fruit). On Earth, there are still more than a thousand different types of gymnosperms.
What are the feature of gymnosperm?Several shrub species are also found, and these are often medium to large trees. Gymnosperms, which include some of the tallest tree species, including the sequoia.
The leaves, stem, and roots are the three distinct parts of the plant's body. Similar to conifers, the leaves have a thick cuticle, needle-like shape, and depressed stomata. This characteristic reduces water loss from transpiration.
The taproot system is the type of root system seen in gymnosperms. In some plants, these roots have a relationship with fungus and produce mycorrhiza, e.g. Pinus. While in certain other species, such as the Cycas plant, the roots take the shape of specialized roots known as coralloid roots and are linked to cyanobacteria that fix nitrogen.
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what is the relationship between peripheral resistance and blood pressure ? between blood viscosity and blood pressure
Answer:
Peripheral vascular resistance (systemic vascular resistance, SVR) is the resistance in the circulatory system that is used to create blood pressure, the flow of blood and is also a component of cardiac function. When blood vessels constrict (vasoconstriction) this leads to an increase in SVR.
The relationship between BP and viscosity is such that, given a constant systolic BP, if blood viscosity increases, then the total peripheral resistance (TPR) will necessarily increase, thereby reducing blood flow. Conversely, when viscosity decreases, blood flow and perfusion will increase.
Felis concolor is a species of cat that expresses incomplete dominance in fur color. RR= white fur, rr= black fur, and Rr= grey fur. If you crossed a homozygous dominant male with a homozygous recessive female, what would the resulting genotype and phenotype be?
Answer:
Explanation:
genotype-
100% Rr
phenotype-
100% grey
A fertilized egg, or a
is formed from the fusion of egg and sperm.
vagina
uterus
zygote
ovary
Answer:
Zygote
Explanation:
A zygote is a fertilized egg.
Answer:
zygote
Explanation:
they're correct !
4. Does simple diffusion require an input of energy?
Answer:
no
Explanation:
Simple diffusion does not require energy or need the assistance of a transport protein. Other larger or charged molecules that diffuse across a membrane may need assistance from a protein.
Genes are responsible for:
A.
all preferences of an organism.
B.
no traits of an organism.
C.
all traits of an organism.
D.
all inherited traits of an organism.
PLEASE HELP
Answer:
C. All traits of an organism
Suppose a goat has a homozygous dominant individual (AA) is crossed with an individual
that is heterozygous for the same trait (Aa). What are the possible genotypes of the offspring, and what percentage of the offspring is likely to show the dominant phenotype?
Answer:
100%
Explanation:
I found this answer by using a Punnet square.
Which of the following statements is true about the role of water in celular respiration?
It reacts with glucose.
It reacts with oxygen
It is one of the beginning compounds.
It is one of the ending compounds.
Answer:
it is one of the ending compounds
Explanation:
Answer:
This one is D Have a good day
Explanation:
How dose natural selection lead to evolution
Answer:
Naturally selected organisms will survive and reproduce better adapted to the environment. This indicates that this model organism's beneficial allles are passed to offspring. The selection cycle contributes to adaptation for several years.
Explanation:
Hope this helps.
How can diversity be determined by the environment?
Answer:
Emy if you are new here let me tell you u can't a descriptive questionnn for 10 points u need to shoot it to 100
Answer:
Broadly speaking, the diversity of an ecosystem is dependent on the physical characteristics of the environment, the diversity of species present, and the interactions that the species have with each other and with the environment
Explanation:
-. What are the two steps involved in the creation of proteins? Define
each. Which step is the job of the ribosomes?
Answer:
Explanation:
Protein synthesis is the process in which cells make proteins. It occurs in two stages: transcription and translation. Transcription is the transfer of genetic instructions in DNA to mRNA in the nucleus. In eukaryotic cells, transcription takes place in the nucleus.
I hope this helps! <3
(googles words, not mine)
Do most organisms contain the same condons true or false ?
Answer:
this is true. can u give me the brainliest answer
To support the ecosystem in the previous question, botanical gardens are propagating these trees for sale. Although seeds have been collected, the commercially available plants are from cuttings and tissue culture. Based on the life cycle of conifers, why is it not practical to reproduce Wollemi pines from seed or even to sell the seeds?
Answer:
A tree that possesses scale or needle-like leaves and cones that remains green throughout the year is known as a conifer. Some of the examples of conifers are cedars, junipers, redwoods, pines, etc. These trees have great economic importance as they are the prime sources of turpentine and resins, and are also a great source of softwood.
It is not practical to cultivate the Wollemi pines from their seeds, as the majority of the seeds that fall from the cones of Wollemi are not viable, and their cultivation may even consume many months. The species mentioned is also considered as endangered, therefore, it will not be feasible to cultivate them via the help of seeds.
If I put a plant under Greenlight it would be able to photosynthesize true or false
Answer:
false
Explanation:
chlorophyll does NOT absorb green or blue light strongly
Answer:
yes it's true, photosynthesis will occur
Which of the following categories includes all of the others?
Species
Population
Community
Ecosystem
Answer: population
Explanation: because is the major factor and the more important to order al species
When do the respiratory and circulatory systems work together?
O A. To promote digestion
O B. To stop bleeding
C. To fight infections
O D. To supply nutrients
SUBMIT
imaginary essay
Exchange place with best friend
4. Is predation a density-dependent or density-independent factor?
Answer:
The correct answer is density-dependent factor.
Explanation:
The factors whose influences on the growth or size of the population changes with the density of the population are known as the density-dependent factors. The availability of food, disease, predation, and migration are some types of density-dependent limiting factors.
One of the density-dependent factors in nature is predation, predation confines various populations. The population of the prey and the predator encircle towards each other, with the population of the predator somewhat lagging behind the population of the prey.
With the increase in the population of the prey, the predator gets more to eat, and thus the population of the predator increases. With the increase in the predator population, pressure imparts on the prey population and it starts to decline. The decline in the availability of the food eventually makes the population of the predator to decline. Therefore, it can be seen that both the population of the prey and the predator are affected by predation, that is, a density-dependent factor.
