Answer:
Explanation:
.
The Barton Springs salamander is an endangered species found only in a single spring in the city of Austin, Texas. There is growing concern that a chemical spill on a nearby freeway could pollute the spring and wipe out the species. To provide a source of salamanders to repopulate the spring in the event of such a catastrophe, a proposal has been made to establish a captive breeding population of the salamander in a local zoo. The zoo was asked to provide a plan for establishing this captive breeding population, with the goal of maintaining as much of the genetic variation of the species as possible in the captive population.
What factors are likely to lead to a loss of genetic variation in the captive population?
a. increased rate of mutation
b. a founder effect
c. reduced genetic drift over time
d. a lack of inbreeding
What strategy would likely be effective in mitigating the loss of genetic variation in the captive population?
a. keeping the sex ratio as close to 50:50 as possible
b. stopping gene flow to and from the captive population
c. regularly mating individuals that are related
d. keeping the captive population as small as possible
Answer:
1) Option b is correct. a founder effect
2) Option a is correct. keeping the sex ratio as close to 50:50 as possible
Explanation:
The exposed situation is an example of an ex-situ conservation program. These programs are planned to keep and restore the population of species that are in danger of extinction. There are many challenges associated with captivity, and one of them is related to maintaining genetic diversity in the population.
1) Introducing a few animals of an endangered species into the zoo might be considered an example of the founder effect. Just a pregnant female is enough for it to occur. And the most significant problem associated with this event is the loss the genetic diversity or variability. When breeding animals in captivity there is a high risk of losing some genes and fixating others, due to inbreeding.
Genetic drift is the random change that occurs in the allelic frequency of a population through generations. The magnitude of this change is inversely related to the size of the original population. These changes produced by genetic drift accumulate in time. Eventually, some alleles get lost, while some others might set. Genetic drift affects a population and reduces its size dramatically due to a disaster or pressure-bottleneck effect- or because of a population split -founder effect-. In founder effect, a new population originates when a few individuals, coming from a bigger-sized population and carrying their genes, settle down in a new area and reproduce. This small population might or might not be genetically representative of the original one. Some rare alleles might be exceeded or might be lost by complete. Consequently, when the small population increases in size, it will have a genetically different composition from the original one. In these situations, genetic variability is reduced, and there exists the possibility of developing a peculiar allelic composition. When the number of individuals that originated the new population is low, the founder effect will be very extreme because the genetic drift effects are inversely proportional to the original number of individuals.
2) When selecting the animals that are being kept in captivity, it is significant to consider a few aspects concerning genetic diversity maintenance. The main objective is to prioritize the original genetic material.
To get founder individuals that get to represent the maximum genetic variability of the population, or among population if possible. The sex proportion of the founder individuals should always be 1:1 or 50:50. This ratio is important to keep genetic variability, especially because many males in captivity might have reproductive problems. To keep diversity, females need to mate with different males, and not just a few of them. Animals should be subadults reaching their sexual maturity.When mating animals, they should be as different as possible to decrease the possibility of a common ancestor among the couple.which two statements best describes the position of a coastal area during a high tide?
a. it is parallel to earths axis
b. it faces directly toward or away from the moon
c. it is parallel to earths orbit plane
d. it is perpendicular to the moon
The two statements that best describes the position of a coastal area during a high tide is that it is perpendicular to the moon which is therefore denoted as option D.
What is a Tide?This is referred to the are very long-period waves that move through the ocean in response to the forces exerted by the moon and sun an there are two types which are high and low tide.
The position of coastal ares during high tide is that it is perpendicular to the moon which is why the side of the Earth closest to the Moon experiences the Moon's pull the strongest, and this causes the seas to rise, creating high tides.
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Answer:
The answer would be B
Explanation:
multiple choice question
Answer:
C) Sodium ions
The products of the glycolysis of one molecule of glucose can drive the citric acid cycle
Answer:
Since glycolysis of one glucose molecule generates two acetyl CoA molecules, the reactions in the glycolytic pathway and citric acid cycle produce six CO2 molecules, 10 NADH molecules, and two FADH2 molecules per glucose molecule
The products of glycolysis alone are not sufficient to directly drive the citric acid cycle (also known as the Krebs cycle or the tricarboxylic acid cycle).
However, the output of glycolysis, specifically pyruvate, is a crucial substrate that enters the mitochondria, where it undergoes further processing before entering the citric acid cycle.
The energy carriers, specifically NADH and FADH2, play a crucial role in driving the electron transport chain, the final step of cellular respiration.
The electron transport chain uses the energy from NADH and FADH2 to generate a large amount of ATP through oxidative phosphorylation.
Thus, while the products of glycolysis do not directly drive the citric acid cycle, they contribute to the overall energy production and supply the necessary substrates, such as acetyl-CoA, which is essential for the initiation of the citric acid cycle.
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23. Which is NOT an electromagnetic wave?
A. sound
C. infrared wave
B. microwave
D. ultraviolet ray
Answer:
sound
Explanation:
electromagnetic waves travel at the speed of light, for example when there is a thunder storm the lightening is seen before the thunder is heard
The main types of molecules in your body are water and carbon-containing organic molecules. To continue to live, you need to consume organic molecules in your food. What does your body use these organic molecules for?
Answer:
for production of energy
Explanation:
to enable the action of heart beat, keeping the body warm, to build body tissues, etc, while facilitates ones living
Classify each trait as favorable or non-favorable for different organisms
living in a jungle
Favorable trait
Non favorable trait
A thick layer of fot to help
keep the organism warmin
the cold
Green fouthers to help
Camouflage
Long strong limbs to help
climb trees
Answer:
A thick layer of fat to help keep the organism warm in the cold - non-favourable trait because jungles aren't usually very cold
Green feathers to help camouflage - favourable trait because the environment is mostly green
Long, strong limbs to help climb trees - favourable trait because jungles have many trees
Explain how fish and sharks breathe. what are some differences?
It is also possible to extract DNA from your human cells. Would a cell in your liver contain the same chromosomes as a cheek cell? Explain.
Answer:
Yes
Explanation:
The genomic DNA found in all nonreproductive cells is the same, no matter what tissue the cells come from.
The genomic DNA determined in all nonreproductive cells is identical, regardless of what tissue the cells come from.
To get the DNA from a molecular, scientists normally rely upon certainly considered one among many DNA extraction kits to be had from biotechnology companies.
What is DNA extraction?During a DNA extraction, a detergent will purpose the molecular to pop open or lyse, in order that the DNA is launched into solution. Then alcohol is introduced to the answer reasons the DNA to precipitate out.DNA extraction is an ordinary system used to isolate DNA from the nucleus of cells.
Thus it is clear that yes we can extract DNA from your human cells.
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Which system of astronomical coordinates does not have its point of origin at the
Vernal Equinox?
Equatorial
Ecliptic
Celestial
Galactic
Answer:
Celestial ecliptic
Explanation:
In space seience , the ecliptic is really the conformance that represents the Sun's visible movement from around stars and planets over the span of a year; from some other perspective, it is the reflection on the celestial equator of Earth's orbit around the Sun. The constellation stars and planets are distributed around the ecliptic.
Answer:
Galactic
Explanation:
The origin of the galactic coordinate system points towards the center of the galaxy rather than towards the vernal equinox. The celestial and ecliptic coordinate systems have their point of origin towards the Vernal Equinox. The equatorial coordinate system doesn't exist.
Help me please omggg I need help I am begging y’all
Answer:
the answer is D
Explanation:
it is better explain and it could pullout water
Please help! I will give brainliest!⚠️⚠️
Name the characteristic of living organism illustrated by each if activities described below.
Dressing heavily.
Bursting of the sporangium in Rhizopus.
Bending of the plant shoot towards light.
A monkey putting a yellow banana in it's mouth
Answer:
This question relates to the qualities that help us differentiate between living and non-living things. In this question, some activities have been described. As indicated below, such activities regardless of how it is exhibited must fall under a certain trait for which living organisms are known. Hence the answer to the question is as follows:
A: Dressing heavily can be characterized as ADAPTATION
B: Bursting of the Sporangium in Rhizopus is a process that is critical to its REPRODUCTION
C: Bending of the plant shoot towards light speaks to MOVEMENT. For them, light is critical to growth so they must move towards it and away from the shade.
D: A monkey putting a yellow banana in its mouth is called NUTRITION. Every living organism must absorb nutrients in order to remain alive and grow.
Explanation:
There are other characteristics that help to differentiate living from non-living organisms. They are best memoriZed using the following acronym:
MR. NIGER A.D.
M: Movement
R: Respiration
N: Nutrition
I: Irritability
G: Growth
E: Excretion
R: Reproduction
A: Adaptation
D: Death
There are other qualities such as
possession of Cells and DNA (a living thing may be unicellular or multicellular)ability to Metabolize, that is, ingest and convert and absorb nutrients Homeostasis: This is the ability of an organism to regulate its internal environment Interaction with living and non-living things
All the above make it easy to distinguish between matter that has life and that which doesn't.
Cheers
what is chromosomes
Answer:
a chrosome is made up of proteins and DNA organized into genes each cell normally contains 23 pairs of chrosomes.
Chromosomes are structures formed by a DNA molecule associated with protein molecules. In prokaryotic cells, we observe a circular chromosome; in eukaryotes, chromosomes are linear and located inside the nucleus.
A CBC specimen was rejected for testing by the hematology department. The tube was filled completely and labeled properly. What might have been the reason for rejection?
Answer:
Explanation:
The only thing I can think of is that if you are testing blood for a CBC, you are sometimes required to reject the 1st sample. Perhaps the technician forgot to take a sample that is just meant to be pitched or it was improperly labeled. I get my blood checked every other week, and the people who take it out are scrupulously careful in making sure that the first tube is labelled as waste. No one has every made the mistake of not doing it, but I can see it happening.
The question says it was properly labeled. I didn't see that. The only other thing I can think of is that the machine improperly recorded what the blood cells were and the numbers were all out of kilter.
5'-AUGGGUAACGGCGUG-3' is an mRNA sequence.
After translation, how many amino acids would this sequence contain in the protein?
Answer:
3???
Explanation:
Why does the water condense in the first tank when the oxygen and nitrogen do not?
the molecules in those gases have very little kinetic energy to push molecules apart. Because of this, the attraction between the molecules pulls them together and condenses the gases into a liquid, just like the water in the first tank. ... When the nitrogen evaporates, the liquid left behind is mostly oxygen.
On the planet Kermit, in the Muppet population, there are two autosomal loci of interest. The first locus has alleles A and a, and the second locus has alleles B and b. A and B are the dominant alleles at the respective loci. The loci act in an epistatic manner, identical to the way two genes interact to produce coat color in labradors. The phenotype here is muppet hair color. We have the following results:
Muppet hair color as a function of two-locus genotypes
Two-locus genotype Muppet hair color
A_B_ Cookie monster blue
aaB_ Elmo red
__bb Janice blonde
If two doubly-heterozygous Cookie-monster blue-haired muppets mate, and produce 1000 children, which of the follow values most closely represents the expected number of Janice blonde-haired offspring?
a. 12.
b. 260.
c. 252.
d. 512.
e. 240.
Answer:
The values that most closely represent the expected number of Janice blonde-haired offspring is 252 individuals, option C.
Explanation:
Available data:
Two diallelic genes acting in a recessive epistatic manner to express hair colorAllele A is dominant over the allele aAllele B is dominant over the allele bA_B_ Cookie monster blue aaB_ Elmo red __bb Janice blondeWhen talking about epistasis, we are referring to an interruption. These are interactions between genes located in different loci in the same chromosome. An epistatic gene can alter, influence, or suppress the expression of a hypostatic gene. When the epistatic gene is recessive, the interaction is known as recessive epistasis.
Observing the altered phenotype proportions of the offspring can reveal which interaction is operating in the trait determination.
In recessive epistasis, the proportion is 9:3:4.
Cross: Between two doubly-heterozygous
Parentals) AaBb x AaBb
Phenotype) Cookie-monster blue-haired individuals
Gametes) AB, Ab, aB, ab
AB, Ab, aB, ab
Punnett square) AB Ab aB ab
AB AABB AABb AaBB AaBB
Ab AABb AAbb AaBb Aabb
aB AaBB AaBb aaBB aaBb
ab AaBb Aabb aaBb aabb
F1) 1000 individuals
9/16 individuals are expected to be Cookie-monster blue-haired, A-B-
3/16 individuals are expected to be Elmo Red, aaB-
4/16 individuals are expected to be Janice blond, A-bb + aabb
16 ------------------------------------------- 1000 individuals
4 Janice blond individuals ---------- X = 250 individuals
So, 250 individuals are expected to be Janice blonde. The observed number might vary a little bit from this value. The values that most closely represent the expected number of Janice blonde-haired offspring is c = 252 individuals
7. Photosynthesis is impossible at a depth of 1000 m because: A it is too hot B only blue light penetrates this far C no light penetrates this far D it is too cold 8. Which of the following is not true about the viscosity of water? A if it were more viscous the heart would not be able to move the blood through the blood vessels B if it were less viscous the organelles would not be suspended in the cytoplasm C if it were less viscous the heart would not be able to move blood through the blood vessels D if it were more viscous the organelles would be damaged in the cytoplasm 9. The high surface tension of water is due to: A unbalanced hydrogen bonding in the body of the water B balanced hydrogen bonding in the body of the water C balanced hydrogen bonding at the surface of the water D unbalanced hydrogen bonding at the surface of the water 10. One benefit of ice being less dense than water is: A water freezes from the top down and water is insulated under the ice B water freezes from the top down and the water under the ice is cooled more quickly C water freezes from the bottom up and the remaining water cools more slowly D water freezes from the bottom up and the remaining water cools more quickly
Answer:
bh
Explanation:
Answer: The answer for 7 is C no light penetrates that far
8 d
9 D
10 A
Explanation:
Carbon dioxide moves through the plasma membrane through the process of
A. osmosis
B. active transport
C. diffusion
D. facilitated diffusion
E. both diffusion and osmosis
What is the probability of tossing a coin and getting heads three times in a row?
What is the chance that the next toss will be heads? What is the chance that the next toss will be tails?
12.5, 8.125,91.875
just do the math, 50/4 then 8 and then subtract
what is a non example of crystallization
Answer:
Microscopically, a single crystal has atoms in a near-perfect periodic arrangement; a polycrystal is composed of many microscopic crystals (called "crystallites" or "grains"), and an amorphous solid (such as glass) has no periodic arrangement even microscopically.
Most inorganic solids are not crystals but polycrystals, i.e. many microscopic crystals fused together into a single solid. ... The third category of solids is amorphous solids, where the atoms have no periodic structure whatsoever. Examples of amorphous solids include glass, wax, and many plastics.
In condensed matter physics and materials science, an amorphous (from the Greek a, without, morphé, shape, form) or non-crystalline solid is a solid that lacks the long-range order that is characteristic of a crystal. In some older books, the term has been used synonymously with glass.
Explanation:
This chapter highlights mesocrystals as an interesting example of particle‐mediated, non‐classical crystallization processes. Mesocrystals — the shortened name for mesoscopically structured crystals — are superstructures composed of nanoparticles, being arranged three‐dimensionally in crystallographic register. Mesocrystals are often only intermediate structures in a non‐classical crystallization pathway leading to a final single crystal by nanoparticle fusion. Therefore, they are difficult to detect. Although mesocrystals were initially described for synthetic systems, recent investigations have revealed an increasing number of bio‐mineral systems which appear to be mesocrystals, but which so far have been considered to be single crystalline, including nacre and sea urchin spines. This chapter briefly defines non‐classical crystallization processes, provides some examples of synthetic mesocrystals and mesocrystals in biomineralization, and attempts to provide some insight into their formation mechanisms, despite their being as yet largely unexplored.
Question 4 of 29
Which of the following contains chemical energy?
A. Plants
B. Light
C. Height
D. Winds
Can anyone answer this science question? No links please
Which constellation is found at approximately -15° declination and 4 hours 40
minutes right ascension?
Lepus
Canis Major
Eridanus
Taurus
Answer:
Eridanus.
Explanation:
Eridanus is a constellation recorded in antiquity by Ptolemy and is one of the 88 official constellations established by the International Astronomical Union.
It is located south of the zodiac constellations Aries and Taurus, and includes about 126 stars visible to the naked eye from 1st to 6th magnitude. It is considered the longest of the constellations: it starts from the celestial equator and ends at the 60th southern celestial parallel.
Which statement BEST describes parasitism?
A.
The parasite is able to live on the host while providing benefits to the host.
B.
The host is the one who benefits at the expense of the parasite.
C.
The parasite is the one who benefits at the expense of the host.
D.
The parasite and host mutually benefit from the relationship.
C. The parasite is the one who benefits at the expense of the host.
State what is lost at each trophic level of a food chain and describe what this is used for.
Answer:
energy is lost at each trophic level and the energy is used for warmth and digestion
Explanation:
when we eat we get energy and so do animals. like an ant will eat grass and gain energy then a anteater would eat the ants and gain energy to use for digestion then a bigger animal eats the ant eater and gains its energy and so on but everytime something is eaten energy is lost
Could someone pls help me
Living things are shielded from harmful UV radiation by ozone inside the upper atmosphere, which keeps the sun's rays from reaching the planet's surface.
What really is ozone?The colorless, odorless reactive atmosphere known as ozone is created when three oxygen atoms combine. It can be found in nature blocking UV radiation that can damage the planet's life in the troposphere of the atmosphere.
Why does ozone so important?The atmospheric ozone layer in the stratosphere absorbs some of the solar radiation, preventing it from reaching the planet's surface. The main UVB energy that it absorbs is this kind of UV light. Numerous harmful effects are associated with UVB, a kind of ultraviolet rays emitted by the sun including sunlamps.
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Please help
Given the original DNA strand and the Mutated strand,
identify the type of Mutation.
Original DNA: ATC GGC TAA CGC TTA
Mutated Strand:
ATC CGC TAA CGCTTA
O Point Mutation or Subsitution
O Deletion
O Insertion
O Inversion
O Duplication
You may assume the Sickle Cell locus is in Hardy Weinberg equilibrium. Also, the term carrier implies that the person has a particular allele in his/her genotype, but is not affected with the condition. If the proportion of an African population that are susceptible to Malaria is 0.688, what proportion of the population are carriers for the Sickle Cell allele (HbS)
Answer:
The frequency of the population that are carriers is 0.284 or 28.4%
Explanation:
According to Hardy-Weinberg equilibrium equation, p² + q² + 2pq = 1
Also, the sum of the allele frequencies for all the alleles at the locus, p + q = 1.
Where where p is the frequency of the dominant allele and q is the frequency of the recessive allele in the population.
p² = dominant h0m0zygous genotype frequency
2pq = heterozygous genotype frequency
q² = recessive h0m0zygous genotype frequency
From the given data; the dominant h0m0zygous genotype, i.e., the proportion of an African population that are susceptible to Malaria, p² = 0.688
p = √0.6880 = 0.829
But p + q = 1; q = 1 - p
Since p = 0.829, q = 1 - 0.829
q = 0.171
Frequency carriers for Sickle Cell allele, i.e., the heterozygous genotype = 2pq
Frequency of carriers = 2 × 0.829 × 0.171 = 0.284
Therefore, the frequency of the population that are carriers is 0.284 or 28.4%
minerals___.
- can’t be compounds
- are the same as rocks
- can be gases
- must be inorganic
Answer:
minerals must be inorganic