2. Describe the role of the following in maintaining a constant body temperature in humans:
(b) The muscles:
Answer:
Muscles can also receive messages from the brain when the body temperature decreases. They respond by shivering. Shivering causes the muscles to contract and relax quickly. This process generates heat.
Some plant species and animal species depend on each other. Which of these animals help thousands of plant species to reproduce?.
Answer:
bees, birds, butterflies, bats, but mostly bees.
Explanation:
what is needed to create a self-sustaining ecosystem inside of a dome?
Which star is part of our galaxy?
•Ursa Minor
•Sun
•Schedar
•North Star
Please help!!!
question; both trypanosoma and plasmodium are different in .......
a) type of nucleus
b) ability to move
c) mode of nutrition
d) phylum they belong to
How were scientists able to identify what gene was mutated when they studied families in Finland?
The scientists employed the use of X-exome sequencing to identify rare gene mutations in the families.
What is X-exome sequencing?This involves the process of genes on chromosome X being identified through positional cloning and used ib various studies.
This was used to identify rare gene mutations in the families in Finland thereby making it the most appropriate choice.
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6. An important role of bicarbonate ions in human blood is to
(A) carry oxygen
(B) act as a buffer
(C) bind with hemoglobin
(D) supply cells with carbon
(E) increase the rate of cellular respiration
Bicarbonate ions present in body performs a variety of functions, in blood it carries carbon dioxide. Its other functions include keeping the balance of acids and bases in the body. It acts as a buffer.
What is a buffer?Buffer is a type of solution that resists pH change either by the addition of acid or base.
Bicarbonate is a base, which the body requires to keep a normal acid-base (pH) balance.
This balance prevents the body from having too much acid means maintaining buffer. The lungs and kidneys helps to keep a normal blood pH by removing excess acid.
Thus, the correct option is B.
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cells must control gene expression so that
Why is hair follicle and hair shaft important ?
Answer:
A hair follicle anchors each hair into the skin. The hair bulb forms the base of the hair follicle. In the hair bulb, living cells divide and grow to build the hair shaft. Blood vessels nourish the cells in the hair bulb, and deliver hormones that modify hair growth and structure at different times of life.
Explanation:
the special type of cell division required to produce gametes is called
Answer: Meiosis
Explanation:
Meiosis creates gamete "daughter cells" that have half the chromosomes as a normal cell that would be created during mitosis, which is the division and reproduction of identical cells from the parent. In humans, a regular 46 chromosome cell divides through meiosis to create gametes with 23 chromosomes. This is important to be sure that an organism that is made through reproduction with sperm and egg has the correct number of chromosomes.
I passed all my exams because of brainly!
Answer: sheesh
Explanation:
The study of normal tissues, or groups of cells and their surrounding extracellular materials, is called:.
Answer:
the study of tissues, or groups of cells and their surrounding extracellular materials, is called Histology.
a
3. Choose the correct answer.
In plant cells the pigment that allows for the food-making process is:
chlorophyll
glucose
carbon dioxide
O cellulose
oxygen
Answer
chlorophyll
Explanation:
Chlorophyll is a pigment that gives plants their green color, and it helps plants create their own food through photosynthesis
The diagram represents several stages of the cell cycle.
G,
s
G
M
During the cell cycle, normal cells exit the G1 phase and enter the Go phase where they rest. Typically,
cells will reenter the cycle at G1 prior to going on to S phase. However, abnormal cells such as cancer
cells, may not be allowed to enter the Go phase to rest.
As a result, these cells will most likely -
F. mutate during G2 phase
G. continuously repeat the cycle
H. die after DNA replication
J. fail to complete mitosis
Abnormal cells such as cancer cells, may not be allowed to enter the G0 phase to rest. These cells will most likely continuously repeat the cell cycle.
What do you mean by Cell cycle?The Cell cycle may be defined as the entire sequence of events happening from the end of one nuclear division to the beginning of the next nuclear division.
The abnormal cell undergoes a repeated cell cycle because they express an enzyme called telomerase that switches the wearing down of chromosome ends.
This happens normally in the cell cycle, and after multiple repeated cycles, such abnormal cell undergoes apoptosis.
Therefore, abnormal cells such as cancer cells, may not be allowed to enter the G0 phase to rest. These cells will most likely continuously repeat the cell cycle.
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What seasonal response(s) to spring do animals in florida have that give them a better chance of survival?
a. animals begin to gather and store food to prepare for the hot temperatures.
b. animals have no responses to the seasonal changes of warmer temperatures.
c. spring is a season of reproduction and growth for animals. plants begin to grow and provide animals with plenty of food.
d. spring is a season of dormancy. animals will hibernate until they have more water, sun, and food.
I just need a description of what role bees play in pollination (it’s horticulture) btw
Answer:
Bees are essential for the growth of flowers and plants. They use the process of pollination where they transfer small grains of pollen from one flower of the same plant to another flower of the same species. This pollen transfer helps the flowers to get continuous growth.
Explanation:
Answer:
In the nature, plants reproduce s*exually but unlike many organisms, they do not directly mate with their opposite gender for reproduction. Their mechanism of reproduction in short is that male flowers produce pollens (yellow, powdery type thing) in thei anthers (male fower gamet) and when these pollens get contact with the female flower's stigma, the pollen fuses with the ovule and produces a fruit containing the seed.
Now how do we get these pollens moving from anthers to stigma? There are two ways. The first is by wind, when wind blows, it carries the lightweight pollens through the air and it falls onto a female flower.
the second one is by bees.
Those flowers produce nectar deep in the flower which can be sensed by bees. Bees enter the flower to collect the nectar while pollens are stuck on to its body. The bees travel to another flower for collecting nectar and when they do, the pollens from the body enter the stigma.
Which of these is made up of organs?
Choose 1 answer:
(A) a cell
(B) an organ system
(C) a tissue
Answer:
Organ System
Explanation:
A group of cells make a tissue.A group of tissues make an organOrgans combined together form an organ system.An organ system is made up of organs.
What are organ systems?An organ system is a biological system consisting of a group of organs that work together to perform one or more functions. Each organ has a specialized role in a plant or animal body, and is made up of distinct tissues.
Moreover, the 11 organ systems include the integumentary system, skeletal system, muscular system, lymphatic system, respiratory system, digestive system, nervous system, endocrine system, cardiovascular system, urinary system, and reproductive systems.
Hence, they are Integumentary System, Skeletal System, Muscular System, Nervous System, Endocrine System, Cardiovascular System, Lymphatic System, Respiratory System, Digestive System, Urinary System, and Reproductive System (Female and Male).
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When many different species live in an environment, the environment has high . if the number of predators increase in an area, the immediate effect will be a .
When the number of predators increase in an area, the immediate effect will be a decrease in number of prey.
What is a predator?A predator in an environment is an animal that kills other smaller animals in its niche for food.
The prey us the smaller animal that is being killed. Therefore when there is increase in the number of predators in an environment, the prey will decreases.
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How many units of energy would there need to be in the first trophic level to end up with 1000 units of energy in the second? in the third? in the fourth?
Answer:
(First) 10,000--->1000--->100-->10 (fourth)
Explanation:
Each trophic levels gets reduced by factor of 10.
Thus if you start with 10,000 in first, then you end with 1000 in second, 100 in third and 10 in forth.
Based on the graph, it can be concluded that the isotope which is most likely to be found with 6.25% of its original amount in 6 billion years is
Uranium-238
Thorium-235
Potassium-40
Rubidium-87
Potassium is most likely to be found with 6.25% of its original amount in 6 billion years because the half life of Potassium-40 is 1-1.5 billion years in graph. Thus the correct option is C.
If it half in 1 to1.5 billion years = 50% gain
1-1.5 billion years = 25%. gain
If we do that 2 more times we will get 12.5% and then 6.25% gain.
What is half life?
Half life is defined as the time required for half of the atoms of a radioactive substance to become disintegrated.
Our estimate is about 1-1.5 billion years so repeating that about 4 times we get around 4-6 billion years for it to gain 6.25%. From this it can be concluded that Potassium-40 as since it comes the closest to remaining at 6.25% its original amount after approximately 6 billion years.
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Which substances are needed to make food in plants?.
Answer:
To perform photosynthesis, plants need three things: carbon dioxide, water, and sunlight. for photosynthesis. Carbon dioxide enters through tiny holes in a plant's leaves, flowers, branches, stems, and roots. Plants also require water to make their food.
Explanation:
the structure labeled 2 represents a molecule of
a
DNA
b
mRNA
c
tRNA
d
rRNA
Answer:
The structure labeled 2 is tRNA, transfer RNA
What happens in the original cell so that each of the daughter cells has a complete set of chromosomes
Answer:
The DNA gets copied equally through a process called mitosis and the copied DNA(chromosomes) are split equally among the daughter cells.
This is a short, white and fluffy
feather. What type of feather
is this?
A. Pennaceous
B. Down
C. Contour
D. Flight
Answer:
letter B is the answer
Explanation:
down yes letter b
photosynthesis takes place inside organelles called
You are studying the phenotypic traits of bone density and muscle mass in cattle and find that the two traits have a correlation coefficient of -1.0. What is the interpretation of this statistic
A correlation coefficient of -1 means that bone density and muscle mass are perfectly correlated but in opposite ways.
Correlation coefficientThe correlation coefficient, r, is a measure of the strength of the relationship between two variables.
r = 0 means that the two variables in question have no relationship, r = 1 means that the two variables are perfectly correlated in the same way, and r = -1 means that the two variables are perfectly correlated but in opposing ways.
The implication of the -1 correlation coefficient is that bone density increases with decreasing muscle mass and vice versa.
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Multiple choice: Circle the best answer.
a
The height of a plant is likely to be determined by
a. genetic factors.
b. factors in the environment.
C. both genetic and environmental factors.
d. neither genetic nor environmental factors.
Why are meerkats affected by the plant population?
Answer:
They largely depend on it for survival as meerkats are omnivores.
Explanation:
The combined effects of hotter and drier summers and fewer plants would threaten the persistence of the meerkat population. Since they eat plants and other living bugs that usually hang out in plant-abundant areas, their [meerkats] survival depends on the range of plants near them.
Why the leaves are green
Carbon is found in all living organisms. the constant flow of carbon on earth through organisms and the air is known as the carbon cycle. plants absorb carbon from the atmosphere in the form of carbon dioxide. they use it for respiration and photosynthesis animals consume plants, transferring carbon along the food chain. plants and animals respire and release carbon into air. when the animals and plants die, they are eaten by carbon enters back into the atmosphere in the form of
According to the research, most of the carbon quickly enters back into the atmosphere in the form of carbon dioxide.
What is the carbon cycle?It is the process that describes the flow of carbon (in the form, for example, of carbon dioxide) in the atmosphere, the ocean, the terrestrial biosphere.
Thus, the CO2 in the atmosphere passes through photosynthesis to the plants, also the cycles of respiration and microbial decomposition intervene, which release new CO2 in gaseous form into the atmosphere.
Therefore, we can conclude that according to the research, most of the carbon quickly enters back into the atmosphere in the form of carbon dioxide.
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Answer:Decomposers an carbon dioxide
Explanation:
