Answer: The correct option is D(Some produce toxic agents in the water).
Explanation:
Dinoflagellates are found in the phylum Dinoflagellata which are single celled organisms. They are mostly found in the ocean while few of them can live in streams, freshwater ponds and rivers. The following characteristics can be used to identify a Dinoflagellates, these include:
--> they are golden brown
--> they possess assimilative cell with indented waist.
--> they possess large nucleus with visible chromosomes.
It has been reported that many dinoflagellate species can produce various natural toxins. These toxins can be extremely toxic and many of them are effective at far lower dosages than conventional chemical agents. Therefore the option, Some produce toxic agents in the water, is a correct statement.
1. Why is the nitrogen cycle important?
Answer:
Nitrogen is found in soils and plants, in the water we drink, and in the air we breathe. It is also essential to life: a key building block of DNA, which determines our genetics, is essential to plant growth, and therefore necessary for the food we grow.
Explanation:
Marke me a brainlistDescribe three different measures that can be obtained from a single age distribution graph comparing males and females of a given population.
A single age distribution graph comparing males and females of a given population can provide a wealth of information. Three of the most important measures that can be obtained from such a graph are the population size, the age structure, and the gender ratio.
What is the way to measure the population size ?The population size can be determined by adding the total number of males and females represented in the graph. This is an important measure of the overall population size, and can be used to compare the population size of different countries or regions.
The age structure of the population can be determined by looking at the distribution of males and females across different age groups. This is an important measure of the demographic makeup of a population, and can be used to identify trends in population growth or decline.
Finally, the gender ratio of the population can be determined by comparing the number of males and females in each age group. This is an important measure of the overall gender balance in a population, and can be used to identify areas where there is a need for greater gender equality.
In conclusion, a single age distribution graph comparing males and females of a given population can provide a wealth of information. Three of the most important measures that can be obtained from such a graph are the population size, the age structure, and the gender ratio.
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hi can u Help me in my hw, Define the following terms:1)Epicenter 2)Seismograph(don't answer if u don't know the answer plz)
Answer:
Epicenter is the point on Earth's surface directly above the focal point of the earth quake.
Actually it's above the hypocenter.
Seismograph: Is an instrument that records the seismic waves caused by action of earth quake effect.
Which process involves the body maintaining homeostasis? *
PLEASE HELP ASAP FAST
Answer:
B.UAA is correct answer
explain how typical cells are adapted to their function
Answer:
Many cells are specialized. They have structure that are adapted to their function. For eg : muscle cells bring parts of the body together. They contain protein fibres that can contract when energy is available, making the cells shorter.
Which type of energy refers to the sum of potential and kinetic energies in the particles of a substance?
Answer:
The answer is Internal energy
KE + PE = IE
Explanation:
The sum of potential and kinetic energy is refers to mechanical energy which is expressed by motion
Answer:C for edge (internal energy)
Explanation:
HELP ASAP I WILL GIVE BRAINLIST
The picture shows two containers filled with a gas, both initially at room temperature.
Which statement is correct?
The gas particles in both containers have the same average kinetic energy because they have equal number of particles.
The gas particles in both containers have the same average kinetic energy because they have the same volume.
The average kinetic energy of the gas particles is greater in container A because it has a lower temperature.
The average kinetic energy of the gas particles is greater in container B because its particles move faster.
Answer:
1) CO₂
2) 0.2551 g
Explanation:
The balanced reactions are:
CaCO₃ + 2HCl → CaCl₂ + H₂O + CO₂
MgCO₃ + 2HCl → MgCl₂ + H₂O + CO₂
1) The gas produced is CO₂.
2) Calculate mass of CaCO₃:
(0.5236 g) (0.4230) = 0.2215 g CaCO₃
Convert to moles:
(0.2215 g CaCO₃) (1 mol / 100.1 g) = 0.002213 mol CaCO₃
Find moles of CaCO₃:
(0.002213 mol CaCO₃) (1 mol CO₂ / mol CaCO₃) = 0.002213 mol CO₂
Convert to mass:
(0.002213 mol CO₂) (44.01 g / mol) = 0.09738 g CO₂
Calculate mass of MgCO₃:
(0.5236 g) (0.5770) = 0.3021 g MgCO₃
Convert to moles:
(0.3021 g MgCO₃) (1 mol / 84.31 g) = 0.003583 mol MgCO₃
Find moles of MgCO₃:
(0.003583 mol MgCO₃) (1 mol CO₂ / mol MgCO₃) = 0.003583 mol CO₂
Convert to mass:
(0.003583 mol CO₂) (44.01 g / mol) = 0.1577 g CO₂
Total mass of CO₂:
0.09738 g CO₂ + 0.1577 g CO₂ = 0.2551 g CO₂
Answer:
The average kinetic energy of the gas particles is greater in container B because its particles move faster.
Explanation:
Which of the following controls the involuntary actions in the body
1. Sensation is to as perception is to a. vision, olfaction b. conscious, unconscious c. awareness, interpretation d. taste, vision.
Answer:
opt (c)
Explanation:
Raw materials required in the autotrophic mode of nutrition involve:
Answer:
Water,mineral salts and carbon dioxide
All parts of a nonvascular
plant must be near a
because it doesn't have
long roots.
A. water source
B. heat source
C. food source
D. air source
Answer:
a.water source
Explanation:
Which of the following iS a possible future milestone in environmental policy?
a.
water pollution policy
b. implementation of a cap and
dividend policy
C.
mandatory environmental assessments
d environmental impact statements
Answer:
a. water pollution policy
In a mob, all it takes is one dominant and electric individual to convince people to act through the
effect.
Answer:
Yes.
Explanation:
Yes, In a mob, one dominant and electric individual has the ability to convince people to act through the effect. This individual is the person who bring these people to fight for their rights and all the people of the mob obeys his orders and he is the only person who can stop these people from causing trouble and violence. All the people in the mob considered him their leaders and follow him in every decision.
Which part of plant carries water and minerals from roots to other parts of the plant
Answer: The xylem distributes water and dissolved minerals upward through the plant, from the roots to the leaves. The phloem carries food downward from the leaves to the roots. Xylem cells constitute the major part of a mature woody stem or root.
7. Which substances are produced by the hydrolysis of an
oil?
(1) water and nucleic acids
(2) amino acids and dipeptides
(3) fatty acids and glycerol
(4) glucose and water
Answer:
3) Fatty acids and Glycerol
What. Is black i will mark as brinelist
simple. black. Is a color and it is dark
What allows humans to have different traits from each other?
A. They store DNA in different places.
B. They have different genes.
C. They have different haploidnumbers.
gling
D. They have different number
Ichromosomes.
SUBMIT
Answer:
B. They have different genes.
Explanation:
QI the father
13. A father and mother claim they have been given the wrong baby at the hospital. Both parents are
blood type A. The baby they have been given is blood type o. Does the genetic evidence support
their claim?
No, the claim is not based on scientific evidence because to heterozygous parents with genotype AO may have offspring with O phenotype and therefore OO genotype (proportion 1/4 of descendence).
What is the ABO blood type?The ABO blood type is a group of phenotypes controlled by a single locus, which is based on the alleles that encode surface antigens in red blood cells. The O phenotype is due to the recessive allele, while the A allele is dominant and therefore masks the O allele in heterozygous individuals.
Therefore, we can conclude that parents having the AO genotype may produce offspring with OO genotype
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Which is a compound that allows plants to get nitrogen from the nitrogen cycle?
Answer:
Plants can use ammonia as a nitrogen source. After ammonium fixation, the ammonia and ammonium that is formed will be transferred further, during the nitrification process. Aerobic bacteria use oxygen to convert these compounds.
The period of female fertility during each Month is short For fextilization to take place intercouce must occur each
a) A few hours before ovalation up to 4-5 days after avulation
b) Around 24 hours before ovulation up to around. 24 hours after ovulation
C) Sometimes between 2-3 days before ovulation upto 2-3 days after ovulation
d) Around 4-5 days before ovulation upto a few hours after ovulation
E) Around 4-5 days before ovulation upto 4-5. after ovulation.
Answer:
The so called fertility window is the days in the menstrual cycle when conception is ... Ovulation usually occurs 14 days prior to your period starting.
Explanation:
It isn't any of your selections but I hope it helped for the choices to decide which one would go to the paragraph I have given
What is the best description of the word 'Variation' in biology?
O A. Differences between individuals of a species, and between different species.
OB. A large group of completely different items.
C. The differences between different parts of the same organism.
D. Change over time of a species.
Variation in biology is best delineate because the variations between people of a species, and between completely different species.
What is Variation?Variation refers to the variations or deviations from the recognized norm or commonplace. it's going to be a modification in structure, type or operate in associate degree organism, deviating from alternative organisms of identical species or cluster.
In genetic science, variation refers to a personal that possesses characteristics completely different from the others of identical kind. Genetic variation sometimes arises as a mutation sequence that encodes a super molecule or an polymer.
Variations is also mirrored within the composition of the individual, e.g. a distinction in size, color or pattern, or is also detectable solely by deoxyribonucleic acid or super molecule sequencing.
A given variant is also the results of changes during a single sequence, or the consequence of interactions among multiple genes. Populations of identical species living in several components of the globe is also characterized by specific sets of variations.
Variation will, therefore, be measured at the individual level, i.e. variations between individual individuals during a family or population, or at the population level, i.e. variations between populations living in several regions.
The different kinds of variations are:
Environmental factors - Composition variation known as environmental variation.
Inherited factors- The variation passed on from oldsters to offspring, via genes, throughout copy is named heritable variation.
What is Specie?A species is that the basic unit of classification associate degreed a assortment rank of an organism, furthermore as a unit of variety.
A species is outlined because the largest cluster of organisms within which any 2 people of the suitable sexes or sex activity sorts will turn out fertile offspring, usually by amphimixis.
Other ways in which of shaping species embody
- makeup,
- desoxyribonucleic acid sequence,
- Morphology,
- Behavior or condition.
In addition, paleontologists use the idea of the chrono species since fossil copy can not be examined
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The photic zone Select one: a. has the most nutrients closer to land. b. is an area with sufficient light for photosynthesis. c. has an abundance of photosynthetic organisms. d. is very shallow. e. All of the answer choices are correct.
the answer for this would be E
The photic zone has the most nutrients closer to land, an area with sufficient light for photosynthesis, has an abundance of photosynthetic organisms, and is very shallow, Thus, the correct option for this question is E, i.e. all of the following.
Where is the photic zone present in the aquatic ecosystem?The photic zone present in the surface layer of the aquatic ecosystem significantly receives sunlight for photosynthesis. It is the topmost layer that receives sunlight. Hence, this zone is also known as the Sunlight zone.
According to the question, due to the sufficient availability of sunlight, this area performs a good rate of photosynthesis and occupies an abundance of photosynthetic organisms. Phytoplanktons are the characteristic members of this region. As this region has sufficient availability of light, the concentration of nutrients is highly rich.
Therefore, according to the photic zone, the correct option for this question is E, i.e. all of the following.
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The large number of alveoli in lungs improve gas exchange by ________. increasing the surface area for diffusion decreasing the distance for diffusion changing the diffusion constant increasing the concentration difference
Answer:
Explanation:
The large number of alveoli in lungs improve gas exchange by . increasing the surface area for diffusion
What is the correct chronological order of the steps leading to protein synthesis?
rRNA, mRNA, DNA, protein
mRNA, DNA, rRNA , protein
DNA, mRNA, rRNA, protein
rRNA, DNA, mRNA, protein
Answer:
the third option is the right one.
Explanation:
m RNA gets its information from DNA and then sends it to rRNA which will later turn the message into a protein.
In butterflies, having red antennas (denoted by “R”) is dominant to having white antennas (denoted by “r”). If both parents are heterozygous for red antennas, what are the predicted Phenotypic outcomes of their offspring? (hint: a punnett square will help you determine this).
In butterflies, having red antennas (denoted by “R”) is dominant to having white antennas (denoted by “r”). If both parents are heterozygous for red antennas, what are the predicted Genotypic outcomes of their offspring? (hint: a punnett square will help you determine this).
All the offspring of a cross between a black-eyed mendelien and an orange-eyed mendelien have black eyes. What is the expected F2 phenotypic ratio of a cross between two F1 black-eyed mendeliens?
A) 1 black-eyed:1 orange-eyed
B) 3 black-eyed:1 orange-eyed
C) 1 black-eyed:3 orange-eyed
D) 1 black-eyed:0 orange-eyed
The phenotypic ratio of the cross is as follows: 3 red antennas: 1 white antenna
For question 2, the phenotypic ratio of the F2 generation is: 3 black-eyed: 1 orange-eyed
QUESTION 1
According to the first question, a gene coding for antenna color in butterflies is involved. Red antennas (“R”) is dominant to white antennas (“r”). Hence, a butterfly with genotype "Rr" will be phenotypically red.
According to this question, If both parents are heterozygous for red antennas i.e. Rr (red antenna) × Rr (red antenna), the following gametes will be produced: R and r. Using these gametes in a punnet square (see attached image), the following phenotypic ratio of offspring is produced:
3 RED ANTENNAS (RR, Rr, Rr) : 1 WHITE ANTENNA (rr)
2. In the second question, all the offspring of a cross between a black-eyed mendelien (BB) and an orange-eyed mendelien (bb) have black eyes (Bb). In a cross between two F1 black-eyed mendeliens i.e. Bb × Bb, the following proportion of offspring is produced:
BB, Bb, Bb, bb
Hence, a phenotypic ratio of 3 black-eyed: 1 orange-eyed
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Which of the following is a type of adaptation that animals can have?
Physical characteristics
Behaviors
Life cycle differences
I and II
I and III
II and III
I, II, and III
Answer:
Second option
Explanation:
I and II
Name the organ of locomotion of englena and chlamydomonas
Answer:
Paramecium:The primary locomotory organ is cilia which is covers the whole body of paramecium. They also have flagella as its secondary locomotary organ. Euglena: They have flagella and they move by beating up the flagella. Chlamydomonas :A flagellum is a long, whip-like projection of a cell made up of microtubules.
The data table and the cladogram below provide information about the evolutionary history of several different species of animal. Using this information, which of the following is true of trout?
They are more closely related to salamanders than they are to birds.
They are more evolved than salamanders and lizards.
They evolved into a separate species due to the presence of lungs.
They have jaws and lungs but lack claws or nails, feathers, and mammary glands.
Answer:
They are more closely related to salamanders than they are to birds.
Explanation:
According to the data, trout are more closely related to salamanders than birds.
The first data table shows how the salamander only has one extra trait that the trout does not have (lungs).
On the other hand, birds have three extra traits that the trout doesn't have (claws/nails, feathers, and lungs).
The cladogram further shows how trout are more closely related to salamanders compared to birds.
Trout and the salamander are closer together on the cladogram, while the bird is further away. This means they are more related on the evolutionary timeline.
So, the correct answer is that They are more closely related to salamanders than they are to birds.
The statement which is true about Trout is as follows:
They are more closely related to salamanders than they are to birds.Thus, the correct option is A.
What is Cladogram?A Cladogram may be defined as a type of family tree or classification tree which is based on evolutionary relationships. It is also known as a phylogenetic tree.
Trout and the salamander are positioned closer to one another on the cladogram while the bird is being far away. The presence of lungs is marked from the salamander, so trout do not have lungs.
Trouts evolved from Hagfish but not from salamanders and lizards. Trouts only have jaws but lungs, claws or nails, feathers, and mammary glands.
Therefore, the correct option for this question is A.
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Question 12 of 20
When a substance changes from a solid to a liquid, what happens to the
motion of its particles?
A. They move more slowly and become fixed in position.
B. They move at the same speed but in random directions.
C. They move more quickly and independently.
O D. They move more quickly and begin to move past one another.
SUBMIT
Answer:
Option C
(You could visualise ice to water for an example)
