Answer:
the lactose Expresses as long as it is present. when all lactose is converted into glucose and galactose, the reaction stops
how does the kidney help with excretion
Answer:
kidneys filter about a half cup of blood every minute, removing wastes and extra water to make urine
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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If the velocity of a can increases from 30 ms-1 to 90 ms -1, the kinetic energy
increases by
a. 8 times
b. 9 times
c. 7 times
d. 6 times
Give three reasons why you might have a situation in which bacterial colonies were found on the first section of a streak plate, but not on sections two and three.
Hi. You have not shown the sections this question refers to, nor have you provided more information about those sections. This makes it difficult for your question to be answered. However, I will try to help you as best I can.
Generally speaking, we can consider that there was no growth of bacterial colonies in sections 2 and 3, because, for some reason, the bacteria was not inoculated in sections 2 and 3. What could also have happened, is that the bacteria in the sections 2 and 3 were eliminated, but the bacteria from section 1 managed to survive and form colonies.
Another possibility is that after inoculating the bacteria in section 1, you didn't handle the bacteria correctly in the other sections, leaving that bacteria to dry out and die.
Finally, the culture media in sections 2 and 3 could be inappropriate for bacteria to develop and form colonies.
Given that the growing opinion root tip has 16 chromosomes in each cell ( normally). During the cell cycle, while the cell is growing and dividing, specify how many chromosomes will the cell have at the G1 phase? and how many chromosomes will it have after the S phase? Explain your answer with a reason/evidence statement
Answer:
16
It is given that the number of chromosomes present in each onion root tip cell is 16. Hence, the number of chromosomes in the cell will be 16 at G1 phase, after S phase and after M phase
Which of these is true for a fertilized egg?
O
A. It has DNA from both parents.
O B. It has a haploid number of chromosomes. .
O C. It has DNA but no chromosomes.
O D. It has too many chromosomes until it splits.
1. Which of the following lists includes cellular structures found
in both plant and animal cells?
A. Chloroplasts, cell wall, cell membrane, cytoplasm
B. Vacuoles, cell membrane, nucleus, mitochondria
C. Cell membrane, cytoplasm, nucleus, cell wall
D. Chloroplasts, vacuoles, cell wall, cytoplasm
Answer:
C. Cell membrane, cytoplasm, nucleus, cell wall
Explanation:The plant cell and the animal cell can be differentiated by the presence of organelles in them.although both are classified as eukaryotes, the presence of the cell wall, vacuoles, and chloroplasts are the most remarkable and distinguishing components of the plant cells which are absent in the animal cells.
How much of the world's population is infected with the tuberculosis bacterium?
A. 1/10
B. 1/3
C. 1/2
D. 1/5
E. 1/20
Answer:
23% im pretty sure that is the answer if i remember right
Hownis the total magnification of a cell calculated
Answer:
The total magnification of a cell is calculated by multiplying the magnification of the ocular lens (also known as eyepiece lens) and the objective lens.
15. The movement of molecules in a fluid or gas from a region of higher
concentration to a region of lower concentration is called:
Explanation:
in gases it is called diffusion:)
In a changing environment, which of the following would be beneficial for the survival of a species?
O offspring with a variety of phenotypes
O offspring with little variation in phenotype
O offspring that closely resemble their parents
O offspring that are adapted to a specific environment
The last one
Explanation:
Offspring that are adapted to a specific environment is the beneficial for the survival of a species.
What is species?A species is an organism's fundamental unit of classification, taxonomic rank, and biodiversity. The biggest group of organisms in which any two individuals of the right sexes or mating types can conceive a fertile offspring, usually by sexual reproduction, is referred to as a species.
A species can also be identified by its karyotype, DNA sequence, anatomy, behavior, or ecological niche. In addition, since fossil reproduction cannot be studied, paleontologists use the chronospecies idea.
There are between 8 and 8.7 million different species of eukaryotes, according to the most recent accurate estimate.
All species are given a two-part name, or "binomial," with the exception of viruses.
Therefore, Offspring that are adapted to a specific environment is the beneficial for the survival of a species.
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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:
please help
Which part of the Sun can be seen only during a solar eclipse? O A. Chromosphere B. Convection zone O C. Corona D. Photosphere
Answer:
chromosphere
Explanation:
Its the outmost layer of the sun, the only part that is visible on an eclipse.
Answer:
chromosphere
Explanation:
It is only visible during total solar eclipses or with sophisticated telescopes.
Shania has a family history of a genetically inherited disease. Based on this information, which statement is true? O Shania has an increased risk of the disease. Shania will get the disease at some point in her lifetime. O If Shania makes unhealthy choices, she will get the disease. The disease will be expressed in all her offspring that have that gene.
Answer:
Shania will get the disease at some point in her life
Explanation:
this will happen because the sickness is genetically implanted in her family
Answer:
The diesease will be apart of the genes in her offspring.
Explanation:
Often times mothers with the sickness gene will spread down the gene therefore starting the generational infection in the first place.
Here can you help me on this?
Answer:
Selective breeding
Selective breeding is when u choose 2 organisms with certain desirable characteristics and bread then together
Animals are selectively bread 4 many reasons
- To have a higher yield (meat, milk, eggs)
- Be able to run faster
trình bày cơ chế hấp thụ và chuyển hóa lipid từ đường tiêu hóa ở người?
Why is the temperature at the extremities, such as the fingers,
sometimes colder than the core body temperature?
O A. So that less energy is lost in cold environments.
OB. The fingers need to be colder to protect the durability of the nails.
C. The fingers do not have thermoregulation mechanisms.
D. So that more energy is lost in cold environments.
Answer:
A. so that less energy is lost in cold environments.
Explanation:
When it’s cold outside, your body makes sure to keep the blood flowing to your core and vital organs to keep them warm. This can change the amount of blood flow to your hands and feet, making them feel cold. This is normal. The blood vessels in your hands and feet constrict (spasm) when it’s cold, to prevent heat loss from your core
