Dolphins, porpoises, and whales all are in the group of marine animals known as cetaceans. Scientists saw many close similarities in the DNA sequences of whales and dolphins. This observation is proof of whales and dolphins both evolved from a relatively recent common ancestor.
What is cetaceans?Cetacean are members of an aquatic group of mammals commonly known as whales, dolphins, and porpoises.
The ancient Greeks stated that cetaceans can breathe air, give birth to live young, produce milk, and have hair. These are all features of mammals.
As the scientist observed the close similarities in the DNA sequences of both the whales and the dolphins. This shows the proof that whales and dolphins both evolved from a relatively recent common ancestor.
Thus, this is the evidence to reveal the reason behind the similarities in DNA sequences in whale and dolphin.
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How is a scientific theory developed?
Answer:
It is developed by a scientific method with observation and research
Which of the following is NOT a dosage form?
Answer:
No c Inglés
Explanation:
Tengo 4 años looooool
The figure describes what kind of evolution method?
A. Natural selection
B. Gene flow
C. Genetic Drift
D. non-random mating
Answer:
gene flow
Explanation:
canicas y piedras son homogéneas o heterogéneas
por
favor
es
para
oy
ayúdenme
Answer:
Heterogéneas.
Explanation:
Se denomina "heterogénea" a toda aquella cosa que, por sus características particulares, no puede ser asimilada a otras sino que posee una individualidad particular que impide dicha asimilación. Así, por ejemplo, una piedra y una canica son heterogéneas entre sí, en tanto no poseen las mismas características y por lo tanto son claramente diferenciables.
State the names of two substances produced by photosynthesis.
Answer:
During photosynthesis, plants produce glucose from simple inorganic molecules - carbon dioxide and water - using light.
Explanation:
Examples of photosynthetic organisms include:
Plants.
Algae (Diatoms, Phytoplankton, Green Algae)
Euglena.
Bacteria (Cyanobacteria and Anoxygenic Photosynthetic Bacteria)
what do biopsies do you believe showed normal cells? how are these cells different from the cancerous cells?
Answer:
Biopsies are done to detect cancerous cells.
In biopsy, a piece of suspected tissue cut in thin sections is stained and examined under microscope.
Normal cells shows the property of contact inhibition
Whereas cancerous cells appears to have lost this property. And they multiply rapidly giving rise to masses of cells called tumour cells.
Complete each sentence regarding the bones of the lower extremity. Then place the sentences in order, based on the bones, from proximal to distal .
tarsals
15
14
6
humerus
5
patella
femur
phalanges
tibia
7
8
fibula
metatarsals
i. There are 2 bones in the lower leg. The________ is more medial, and the________ is more lateral
ii. There are________ small bones of the toes that are called the__________
iii. There are ________irregular shaped bones in the foot known as the _________
iv. The ________is also known knee cap
v. There are __________small, long bones found in the top of the foot called _________
vi. The __________is found in the thigh .
i. There are 2 bones in the lower leg. The fibula is more lateral and the tibia is more medial.
ii. There are 5 small, long bones present in the top of the foot that are metatarsals.
iii. There are 7 irregular-shaped bones in the foot known as the tarsals.
iv. The patella is also called a knee cap.
v. There are 14 small bones of the toes that are called the phalanges.
vi. The femur is present in the thigh.
Genotypes are the genes of an organism with alleles represented by letters of the alphabet. Phenotypes are an organism's observable inherited characteristics.
True or False?
Answer:
True
Explanation:
This is correct for both Genotypes and Phenotypes.
Answer:
True
Explanation:
Genotype is been represented by the letters of a certain gene
and Phenotype is the physical look of an organism
When the ATP synthase molecules are open, the hydrogen ions move out of
the thylakoid. How does the cell use the kinetic energy of the moving ions?
Answer:
the cell uses the kinetic energy of the moving ions by cleating throughout the origin.
Explanation:
Answer:
To combine ADP with a phosphate group to produce ATP
Explanation:
During electron transport, energy is used.
About how much energy would be transferred to tertiary
consumers if the producers begin with 25,000 kcal?
Answer:
B. 25 kcal
Explanation:
I will give you Brainliest if you answer this problem!
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Answer:
Complete the following problems using the equation:
Students are not required to memorize this formula but must know the meaning of the symbols:
D = diversity index
N = total number of organisms of all species found
Σ = the sum of
n = number of individuals of a particular species
D is a measure of species richness. A high value of D suggests a stable and ancient site, and a low value of D could suggest pollution, recent colonization or agricultural management. The index is normally used in studies of vegetation but can also be applied to comparisons of animal (or even all species) diversity.
Example: A lake contains 934 brown trout, 733 smallmouth bass, 34 catfish, 2003 carp,
234 steelheads, and 32 northern pikes.
Fish
Number (n)
n(n-1)
Brown Trout
934
934 x (934-1) = 871422
Smallmouth Bass
733
733 x (732) = 536556
Catfish
34
34 x (33) = 1122
Carp
2003
2003 x (2002)=4010006
Steelheads
234
234 x (233)=54522
Northern Pike
32
32 x (31)=992
Total (N)
3970
= 5 474 620
= 3970 x 3969 = 15 756 930
D = = 2.88
Simpson’s Diversity Index – Practice Problems
When comparing two or more samples, the location with the larger D has a greater amount of diversity. Note that a higher total population does not indicate higher diversity.
An area of the Black Forest in Germany contains 134 pitch pines, 24 douglas firs, and 53 red pines.
A meadow contains 1532 chestnut oaks, 342 black cherry trees, 12 white ash trees, and 1022 yellow birches.
Your backyard contains 12 fleas, 34 aphids, 84 ants, 93 beetles, and 1 butterfly.
An African National Park contains 15 lions, 94 giraffes, 1000 wildebeests, 50 elephants, and 5 hyenas.
Mindo (a city in Ecuador) has 832 toucans, 392 red headed barbets, 3 golden headed quetzals, 500 tanagers, 899 parrots, and 50 white capped dippers.
Answer the following questions in your workbook:
Calculate Simpson’s diversity index for each location. Include the table in your workbook.
Distinguish the differences in diversity between two locations listed above.
Explain what may lead to those differences.
Outline the significance of the Simpson’s Diversity Index. You may refer to the following online resource and your textbook to help outline your ideas - http://www.countrysideinfo.co.uk/simpsons.htm
A map that shows the distribution of white tailed deer in the northeastern US would be a(n)
map.
A. ordnance survey
OB. geologic
OC. environmental
OD. biogeographic
Reset Selection
Answer:
Biogeographic
Explanation:
The analysis of the geographic distribution of species, creatures, and other living things is known as biogeography. It's not only about habitation variations; it's also about the variables that cause differences in distribution.
Distribution of white tailed deer is an example of biogeography or Biogeographic research.
QUESTION 5
Diffusion involves the movement of particles from a region of
А,
low concentration to a region of high concentration through a partially permeable
membrane
B
c.
high concentration to a region of low concentration through a partially permeable
membrane
low concentration to a region of high concentration with or without passing through
partially permeable membrane
high concentration to a region of low concentration with or without passing through
partially permeable membrane
Answer:
High concentration to low concentration with or without a partially permeable membrane
Explanation:
Diffusion is the movement of particles from a region of high concentration (where there is alot of the particle) to a region of low concentration (where there is less of the particle) until it is evenly distributed.
The definition didn't state whether or not a partially permeable membrane was required.
It doesn't have to pass through a membrane. for e.g. spraying perfume at one side of the room and it is smelt on the other side. Meaning it diffused through the room. There was no membrane present.
It can also pass through a membrane for e.g diffusion of oxygen gas into cells (cells have membranes therefore the oxygen diffused through the membrane.)
la energía fotovoltaica emite gases de efecto invernadero?
Answer:
La energía solar fotovoltaica no emite gases tóxicos ni contaminantes, no produce residuos ni tampoco contamina el agua, por lo que su utilización para generar electricidad contribuye de forma efectiva para reducir el calentamiento global.
Do you think landowners should be compensated for their loss by the federal government for habitat conservation of endangered species?
Answer:
Yes
Explanation:
Unless they have a permit to inhabit endangered species. They shouldn't be caring for a endangered species, because they could be doing something to hurt it even if they don't mean to. By law they do confiscate them unless you have a permit.
a) In how many cases in the genetic code would you fail to know the amino acid specified by a codon if you knew only the first two nucleotides of the codon?
b) In how many cases would you fail to know the first two nucleotides of the codon if you knew which amino acid is specified by it?
Answer:
a) 28 cases
b) 3 cases
Explanation:
a) From the table of genetic codes, there are 28 codons that specify more than one amino acid assuming only the first two nucleotides are considered. In these cases, one cannot outrightly specify the amino acid the genetic codes are coding for without knowing the last nucleotide of the codes. For example, UU can be for Phenylalanine or Leucine, CA can be for Histidine or Glutamine, etc.
b) From the table of genetic codes, the first two nucleotides of Arginine can be either of CG or AG, that of Serine can be either of UC or AG while that Leucine can be either of CU or UU. Only in these 3 cases would one fail to know which are the first two nucleotides assuming the name of the amino acids are given.
See the attached image for the genetic code.
write a story about how warmer weather changes the biome you live in
B is dominant for black fur over b for white fur. Cross two rabbits, heterozygous for fur color.
Answer:
Parental cross: Bb x Bb
F1:
- Expected phenotypic ratio: 3/4 black fur (B_); 1/4 white fur (bb) >> 3:1
- Expected genotypic ratio: 1/4 BB; 1/2 Bb; 1/4 bb >> 1:2:1
Explanation:
A gene variant or 'allele' is dominant when it completely masks the presence of the other allele called recessive in individuals that are heterozygous for that gene. In this case, the allele 'B' associated with the black fur phenotype exhibits complete dominance on the allele 'b' associated with the white fur phenotype. In consequence, the mating between two heterozygous (Bb) parents will produce an F1 generation with an expected phenotypic ratio for the fur trait of 3:1, i.e., 3 black fur individuals (B_ genotype) and 1 white fur individual (bb genotype), and an expected genotypic ratio of 1:2:1 among BB, Bb and bb genotypes.
*Which of the following are all direct methods of flood contro
a. soil conservation, dams, artificial levees
b. dams, artificial levees, overflow channels
C. floodplains, artificial levees, dams
d. dams, overflow channels, soil conservation
What is the average for the following set of measurements?
3.1 ml, 2.7 mL, 4.6 mL, 1.9 mL, 8.7 ml?
Answer:
The average is 4.2
Explanation:
science
the imaginary lines which divide the earth into areas of 15º are called
[tex]\huge\colorbox{purple}A\colorbox{blue}n\colorbox{purple}s\colorbox{blue}w\colorbox{purple}e\colorbox{blue}r [/tex]
[tex]\color{red}{⚠TheQueenNoNeedAKing⚠} [/tex]
[tex]\color{Violet}\rm{Answer:}[/tex]
longitude lines
longitude lines. Imaginary lines, also called meridians, running vertically around the globe. Unlike latitude lines, longitude lines are not parallel. Meridians meet at the poles and are widest apart at the equator. Zero degrees longitude (0) is called the prime meridian.[tex]\color{Violet}\rm{☘︎Hopeithelps!}[/tex]
__________________________________
“But you, my Lord, are a God of compassion and mercy; you are very patient and full of faithful love.” — Psalm 86:15 ❤__________________________________
which of the following hypotheses can be tested with experiments? select all that apply
1.) a diet low in sugar reduces the risk for heart disease
2.) coffee increases subject performance on intelligence tests
3.) people that brush their teeth live longer than those who don't brush their teeth
4.) scientists will find a cure for cancer before the year 2020
I know that 4 isn't the answer so I selected the other three and it said I was wrong. isn't a hypotheses something that can be experimented on so can't all of the three have experiments If I'm making sense
Options 1 and 2 can be tested through experimental procedures.
A hypothesis is an explanation for a given phenomenon from the real world.A testable hypothesis is a plausible explanation that can be proved (or rejected) by an experimental and/or observational procedure. A well-designed experiment should have into account the following characteristics: randomization, replication and local control.Manipulation indicates that one variable (dependent variable) is purposefully changed by the scientist in the environment.The controls must be used to prevent non-controlled factors which might be influencing the outcomes of the experiment.Option 3: it is not possible to carry out an experiment to test this hypothesis.Option 4: it is not a hypothesis and a false anachronic statement (cancer is a multifactorial disease that currently still has not been cured).In conclusion, only Options 1 and 2 can be tested through experimental procedures.
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EXPERIMENT 2: Suppose starch would eventually be converted to simple sugars in the absence of amylase. Approximately how long would your experiment have taken if you did not use amylase
Answer: 5years
Explanation: Breaking down of starch into simple sugar without the deployment of amylase to act on it will take a long period of time (as long as 5years).
Enzyme Amylase saves us a lot of time in converting starch into simple sugars. Instead of taking up to years, Amylase only requires about 10minutes to get the job done. It does this by hydrolyzing starch into maltose, glucose, shorter polysaccharides, and dextrins.
AL COMPRAR UN PRODUCTO NOS REBAJAN UN 8% PAGUE 48.000 EUROS . ¿CUÁL ERA EL PRECIO ORIGINAL?
Answer:
V.O = 52.174.
Explanation:
¡Hola!
En este caso, considerando la información dada, es posible para nosotros inferir que al haber una rebaja del 8%, pagamos solamente el 92% del valor original del producto, esto quiere decir que debemos dividir el valor pagado, €48.000, por 0.92 con el fin de conocer dicho precio original:
[tex]V.O=\frac{48.000}{0.92}\\\\V.O=52.174[/tex]
¡Saludos!
15
MULTIPLE CHOICE QUESTIONS
PART A:
Choose the correct answer to each question from the alternatives A, B, C or D. Write +
of your choice in the box provided.
QUESTION 1
isted below are some characteristics of surface areas for gas exchange. Which one of
ecessary for effective gas exchange?
B.
Soft
Thin
D.
Surrounded by ca
Moist
Answer:
thin
Explanation:
so there is faster diffusion rate and also there will be short diffusion distance which therfore will lead to effective exchange:)
Question 9 of 30
Which of the following statements most accurately describes how water
moves through Earth and its atmosphere?
A. Liquid water falls to Earth as rain.
B. Gaseous water moves from the atmosphere to Earth's rivers and
oceans.
C. Liquid water enters the atmosphere from Earth's rivers and
oceans.
O D. Gaseous water falls to Earth from the clouds.
SUBMIT
Answer:
option A
Explanation:
liquid water falls to the earth as rain
Most of earths water______.
Answer:
contains salt
Explanation:
Describe an example of the scientific method. Include any limitations this method has.
The brain is formed by a variety of nervous tissues and connective tissues. The tissues are highly organized and work together to complete a variety of tasks.
How is the brain classified?
Answer:
the answer should be B.organ! but if not then it might be organ system
hope this helps!
Explanation:
(meow) <3
which body system makes red blood cells?
A. single celled
B. multi celled
C. plant cell
D. animal cell
E. tissue
F. respiratory
G. transport system
H. nervous
I. digestive
J. muscular
K. skeletal
L. circulatory
M. cells
N. specialized
O. nutrients
P. grow
Q. respire
Answer:
In the human adult, the bone marrow produces all of the red blood cells, 60–70 percent of the white cells (i.e., the granulocytes), and all of the platelets. The lymphatic tissues, particularly the thymus, the spleen, and the lymph nodes, produce the lymphocytes (comprising 20–30 percent of the white cells).
Answer:
E
Explanation:
Red blood cells, most white blood cells, and platelets are produced in the bone marrow, the soft fatty tissue inside bone cavities. Two types of white blood cells, T and B cells (lymphocytes), are also produced in the lymph nodes and spleen, and T cells are produced and mature in the thymus gland.