Answer:
脑循环是特殊区域循环的最重要组成部分。例如人脑的耗氧量约为全身耗氧量的1/5，人脑血流量约占全部心输出量的13%～15%。充足的脑血流量是lanation:
define and describe osmosis
Answer:
Movement of a solvent (such as water) into a solution with a higher solvent concentration by means of a semi-permeable membrane (as from a live cell), which tends to equal solute concentrations in the membrane on both sides.
Explanation:
Osmosis, the spontaneous transition, distribution, or diffusion of water and other solvents over a semipermeable membrane. In 1877, a German physiologist, Wilhelm Pfeffer, researched the process, which is important in biology.
Osmosis is the passage of water down its concentration gradient, across a semi-permeable membrane. An everyday example is a plastic wrap in your kitchen: it allows air and water vapor to move across it, but no water or food. The membranes of cells are semi-permeable, too.
The difference between a plant with lateral buds and a plant with no lateral buds
when making a circle graph what angle represents 20%
Answer:
The central angle is 20% of 360°, that is
central angle = \frac{20}{100}
100
20
× 360° = 0.2 × 360° = 72° → C
QUESTION
All the following statements support the theory that similar organisms have a common ancestor except...
CHOICES
a. groups of organisms display similar embryonic development
b. transitional fossils show links between groups of organisms
c. similar DNA patterns occur in closely related organisms
d. organisms sharing a habitat tend to develop similar behaviours
Answer:
similar DNA patterns occur in closely related organisms
Can someone answer both pls
Answer:
Not clear picture!!!!!!!!
Juan has collected a cricket. Which question can a dichotomous key help him
answer?
A. Are crickets attracted to porch lights?
B. Which species of cricket is this?
O C. Which species of cricket is the most popular?
O D. How many times do crickets chirp per minute?
The question that can be answered by a dichotomous key is the question; Which species of cricket is this?
What is a dichotomous key ?The term term dichotomous key has to do with the identification of a species based on its characteristics.
The question that can be answered by a dichotomous key is the question; Which species of cricket is this?
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A child is suffering from fever but the doctor cannot immediately pinpoint the ailment on the basis of this one symptom. Explain why. Also mention another two such general symptoms.
the child can also have sore and or maybe stomach problems. it can be indigestion
so there are various conditions one can go through and this may take time for a doctor to discover or bring to light the medical condition that the person I'd goin thru
Explanation:
please notify me if I'm incorrect
How does climate change make weather more extreme?
Answer:
Organized severe weather occurs from the same conditions that generate ordinary thunderstorms: atmospheric moisture, lift (often from thermals), and instability. A wide variety of conditions cause severe weather. Several factors can convert thunderstorms into severe weather.
Explanation:
I hope it will help you
Which of the following statements about facilitated diffusion is true?
Gated proteins control the rate of diffusion.
Molecules move up the concentration gradient.
ATP is required to move molecules through the protein channels.
Molecules move from an area of low to high concentration.
Gated proteins control the rate of diffusion
Some of the cell membrane functions are similar to the ________ of the body.
the skin has cells like that
answer please urgent
Answer:
I think option (b) is right answer
For some parents, their offspring have larger beak depths; for others it's smaller. How does the concept of variation of traits help to explain this?
Answer:
beak depth is a complex (quantitative) trait
Explanation:
Additive effects refer to the resulting effects of two or more genes acting together. Beak depth is a quantitative trait whose variation is determined by the additive effects of many genes acting together and the environment. In quantitative traits, variation is continuous and produces a range of phenotypes. In consequence, in this case, some offspring will have a larger average beak depth compared to their parents, whereas others will have a smaller average beak depth compared to their parents. It is due to the combination of alleles or 'additive effects' inherited from different parents, and the interaction between these genes and the environment. Heritability refers to the proportion of quantitative trait variation due to additive genetic factors: a higher heritability is due to the predominance of additive genetic effects and less influenced by environmental effects.
what process produces oxygen gas in the oxygen cycle?
A. Evaporation
B. Burning
C. Photosynthesis
D. Transpiration
What is not an issue regarding DNA identification?
(A) It is not very reliable
(B) Having databases of millions of DNA profiles can result in more incorrect coincidental matches with partial samples
(C) There is disagreement about whose DNA should be included in the database
(D) Private information related to peoples genetic makeup could get out, which could result in discrimination against them on that basis
Answer:
(A) It is not very reliable
Explanation:
Having a database would cause lots of issues and disagreements
Elephants are not the most common species in African grasslands. The grasslands contain scattered woody plants, but they are kept in check by the uprooting activities of elephants. Take away the elephants and the grasslands convert to forests or to shrublands. The newly growing forests support fewer species than the previous grassland. Given this, elephants can be defined as what type of species in this community
Answer:
The elephants are the keystone species in this ecosystem.
Explanation:
The elephants' job is to knock down trees from time to time to get food from tall stock. This prevents the trees from overpopulating and allows shrub lands to stay in place. This is important as herbivores can continue to graze in large herds and carnivores can continue using the same hunting strategies with little to no push backs by trees.
This makes to elephants a keystone species as without them, the foundation species will decrease in population and create a whole different ecosystem with the trees as the new foundation species.
Which statements describe the synapse? Select all that apply.
It carries information through electrical impulses to the cell body.
It is part of the neuron.
It ensures that information travels in one direction only.
It carries information through chemical impulses to the cell body.
It is the gap between neurons.
It ensures that information travels in multiple directions.
Answer:
A
Synapse, also called neuronal junction, its carries of information through electric nerve impulses between two nerve cells (neuron) or between a neuron and a gland or muscle cell (effector).
Answer:
A
C
E
Explanation:
I just took the quiz on edge
Plants and algae most recently shared a common ancestor 480 million years ago, and plants colonized land shortly after that. Light, water, minerals, and dissolved gases surround the whole body of a submerged green alga, and the buoyancy of water provides physical support. What part did plants evolve to absorb water and minerals on dry land
Answer:
vascular tissues
Difference between Acute Disease & Chronic Disease
NO SPAM
Answer:
Acute disease develop suddenly and last a short time while chronic disease develop slowly and last for an extended period of time.
Explanation:
Acute disease come rapidly and are accompanied by symptoms that require short term care and therefore get better once treated.
chronic disease are slower to develop and may progress over time hence have many warning signs or no signs .
Which is a benefit of binomial nomenclature?
1.Fewer common names
2.Increased understanding and communication
3.Reduced plant-related poisoning
4.Better understanding of genetics of plants
Why do grasshoppers blend with the grass or bush?
what is the prediction of the outcome.genetic crosses between various organisms
Answer:
The results of genetic crosses can be predicted using a chart called a Punnett square. In a Punnett square, the possible male and female gametes of each parent are written across the side and top of the square. The interior squares represent every possible combination of gametes that could combine to form a zygote.
Explanation:
To fill in the square, look at the alleles of the games on the outside edges and bring them across and down to fill in the center of the square. If the offspring is heterozygous, we will write the capital letter in front of the lower case letter.
In the example below T=tall plants and t= short.
define ostia in science
Answer:
Ostia are tiny pores present all over the body of sponges. its function is to let the water, along with desire nutrient flows interior of the sponges.
Answer:
An opening, a passage.
Explanation:
science - Anatomy
Explain the role played by the pancreas as exocrine gland during the breakdown of food in the digestive system
Answer:
Explanation+ Vị trí: Nằm trước sụn giáp của thanh quản, nặng khoảng 20-25g
- Cấu tạo: Ở ngoài là các tế bào tiết, bên trong là nang tuyến. tiết ra hoocmôn là Tirôxin trong thành phần có I ốt
+ Vai trò: Hoocmon tiroxin ( TH) có vai trò quan trọng trong quá trình trao đổi chất và chuyển hoá vật chất và năng lượng trong tế bào.
- Tuyến giáp còn tiết ra hoocmôn Canxitônin cùng với hoocmôn của tuyến cận giáp tham gia điều hòa canxi và phốtpho trong máu.
* Ý nghĩa của cuộc vận động toàn dân dùng muối iôt:
Khi thiếu muối iốt trong khẩu phần ăn hàng ngày, tuyến giáp hoạt động yếu, hoocmôn tirôxin không tiết ra, tuyến yên sẽ tiết nhiều hoocmôn TSH thúc đẩy tuyến giáp tăng cường hoạt động gây phì đại tuyến làm thành bướu cổ. trẻ em bị bệnh sẽ chậm lớn, trí não kém phát triển ; người lớn hoạt động thần kinh giảm sút, trí nhớ kém.
:
ASAP
Identify the error in the following statement: “Photosynthesis is a chemical reaction that takes place in the chloroplasts of green plant cells, where light energy is used to convert glucose and water into carbon dioxide and oxygen.”
A. “glucose” and “carbon dioxide” should be switched
B. No errors
C. “water” and “oxygen” should be switched
D. “chloroplasts” should be “mitochondria”
Photosynthesis is a chemical reaction that takes place in the chloroplasts of green plant cells, where light energy is used to convert carbon dioxide and water into glucose and oxygen. Option A is the right answer.
What is photosynthesis?Photosynthesis is the process by which green plants prepare their own nutrients with the help of sunlight, water, and carbon dioxide.
Photosynthesis helps plants to prepare their own food, these plans are called autographs.Photosynthesis takes place inside the protoplast.This process takes place in some other organisms other than green plants.Chlorophyll is the green pigment that is required for this process to take place.The end products that are formed in the process of photosynthesis are glucose and water.Hence Option A is the right answer.
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which of these sources add water to lakes
Answer:
what are the sources bff
Explanation:
Answer:
Rain runoff, groundwater, melting snow.
Explanation:
Rain flows through various paths and goes into lakes, carrying various types of small leaves or soil particles along with it into the lake.
Groundwater can also form lakes and is the source of freshwater.
The melting snow is also the source of freshwater that flows and reaches the nearby ponds or lakes present in the nearby areas.
what are mendelian genetic used for
Answer:
Mendel first observed the different patterns of gene segregation for selected traits in garden peas and was able to determine probabilities of recurrence of a trait for subsequent generations and analyses of large families with many affected individuals can be used to determine whether a disease-associated gene is located on an autosome or on a sex chromosome, and whether the related disease phenotype is dominant or recessive.
The area where the two chromatid halves of a chromosome
are joined is called a
A. centrosome
B. metaphase plate
C. centromere
D. mitotic spindle
As more is learned about cancer, it has become clear that cancer, with few exceptions, ________. Group of answer choices is only dependent on the inherited genetics is a result of genetics and environmental factors is 100% dependent on inherited genetics has no genetic basis
Answer: Is a result of genetics and environmental factors.
Explanation:
Cancer is the common name for a group of diseases in which there is a division of the body's cells, whose growth exceeds that of normal tissues and which persists in the same excessive manner. It can begin in a localized manner and spread to other surrounding tissues and its malignancy is very variable, according to the aggressiveness of its cells and other biological characteristics of each type of tumor. In general, the behavior of cancer cells is characterized by lacking the reproductive control required by their original function, acquiring the capacity to invade tissues (metastasis), spreading through the organism via the lymphatic or circulatory system, and causing the growth of new tumors in other parts of the body.
A gene is a hereditary unit composed of DNA that carries the instructions for producing proteins, which do much of the work in our cells. Certain genetic alterations can cause cells to evade growth controls and become cancerous cells. These changes can be inherited from our parents if the changes are present in the germ cells (eggs and sperm) and they are called germline changes. In addition, cancer-causing genetic changes can also be acquired during a person's lifetime (somatic or acquired changes), as a result of DNA errors that occur when cells divide either spontaneously or by exposure to carcinogenic substances that damage DNA (environmental factors), such as certain chemicals in tobacco smoke, or radiation, such as ultraviolet rays from the sun. These substances damage DNA, acting as mutagens.
Sometimes, the changes are not in the DNA sequence. For example, the epigenetic modifications are the presence of chemical marks in DNA which can determine if the gene is expressed. This means, whether and how much messenger RNA is produced, because the messenger RNA is translated into proteins.
So, cancer cells have genetic changes compared to normal cells. These changes are due to mutations that can be inherited, acquired spontaneously during life, or acquired due to environmental factors such as sun exposure, smoking, and other factors. In addition, the fact that a person has the cancer-related mutation does not necessarily mean that he or she will develop the disease during his or her lifetime. In some cases, even if they have this genetic vulnerability, they remain healthy, because cancer is a multifactorial disease that depends on many factors, such as the immune system, nutrition and certainly many others currently unknown to medicine.
Sewage discharge and fertilizer runoff is detrimental to coral growth because it increases the ________. water temperature that kills zooxanthellae water temperature that results in coral bleaching amount of toxic synthetic chemicals which stimulate excessive bacterial growth salinity of the water that results in coral bleaching amount of inorganic nutrients in the water that stimulates excessive algal growth
Answer:
The correct answer is - amount of inorganic nutrients in the water that stimulates excessive algal growth.
Explanation:
Fertilizers, sewage discharge and industrial runoff has various chemicls enrich with the inorganic compound and elements that causes eutrophication of the the water body.
Eutrophication causes increase in the number of phytoplanktons and algal growth that is stimulates by the amount of inorganic nutrients.
Thus, the correct answer is - amount of inorganic nutrients that leads to excess growth of algae.
There are four different combinations of offspring genotypes in every Punnett square. Fill in the blanks below to complete the ratio for the Punnet square shown to the right.
Where's the Punnett square?
