Answer:
Sorry I can't understand anything
In the plasma membrane, the phospholipid heads Group of answer choices are isotonic and do not respond to water. are hydrophobic and face inward, shielded from water. are hydrophilic and face inward, shielded from water. are hydrophilic and face outward toward the aqueous solution on both sides of the membrane. are hydrophobic and face outward toward the aqueous solution on both sides of the membrane.
Answer:
hydrophilic and face outward toward the aqueous solution on both sides of the membrane
Explanation:
The cell membrane is mainly composed of phospholipids, which are arranged in a lipid bilayer. In general, phospholipids consist of a glycerol unit, a phosphate group, and two fatty acids. In a lipid bilayer, hydrophilic (polar) phosphate heads are always oriented outwards and interact with surrounding water molecules; whereas hydrophobic fatty acid tails are oriented towards the center of the lipid bilayer away from water. It is for that reason that phospholipids are considered to be amphipathic molecules, where fatty acids confer hydrophobic properties and polar phosphate groups confer hydrophilic properties.
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 of the following is TRUE about the unambiguity of the genetic code?
A.Every codon is specific for its one amino acid.
B.One codon codes for 1 to 4 amino acids
C.A genetic code represents only two amino. acids at a time.
D. Unambiguity is not seen in all organisms.
The difference between a plant with lateral buds and a plant with no lateral buds
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.
Some of the cell membrane functions are similar to the ________ of the body.
the skin has cells like that
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.
:
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
Plasmodial slime molds are characterized by:
Select one:
a. The ability to go from a single cell to multicellular organism
b. Their color and shape
c. The existence of multiple nuclei in a supercell
d. The presence of chloroplasts
Answer:
a,the ability to go from a single cell to multicellular organism
The existence of multiple nuclei in a supercell is the characteristic feature of the Plasmodial slime molds, hence option C is correct.
What are Plasmodial slime molds?It is one large cell called a supercell surrounded by a single membrane without cell walls having multiple nuclei, commonly founds on decomposing forest litter and rotting wood.
This organism is found by the fusion of multiple flagellated cells and which makes the structure of supercells, its formation depends on the availability of food.
It glides along the way where the presence of food particles is observed generally bacteria, lifting and engulfing this food. It has a diameter of 3 to 4 centimeters.
Therefore, Plasmodial slime molds are characterized by the existence of multiple nuclei in a supercell.
Learn more about Plasmodial slime molds, here:
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Can someone answer both pls
Answer:
Not clear picture!!!!!!!!
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.
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
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
Explica brevemente en que consiste la teoría de la deriva continental y menciona los contenientes que se crearon a partir de la Pangea
Esta teoría hace referencia al movimiento actual de las placas que sustentan los continentes y que se desplazan a lo largo de millones de años. En toda la historia geológica de la Tierra, los continentes no han estado siempre en la misma posición. Existe una serie de evidencias que veremos posteriormente que ayudaron a Wegener a refutar su teoría. El movimiento se debe a que continuamente está formándose nuevo material procedente del manto. Este material se crea en la corteza oceánica
What's globalization ? A. The idea that the
Earth is one nation B. The process by which a
company buys products made everywhere in
the world C. The process of looking at
something from multiple perspectives C. The
process by which people , companies, and
governments worldwide interact economically
and socially
Answer:
c The
process by which people , companies, and
governments worldwide interact economically
and socially
Explanation:
globalization the process by which businesses or other organizations develop international influence or start operating on an international scale.
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
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.
answer please urgent
Answer:
I think option (b) is right answer
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
Cells are:
A. where prisoners live.
B. a group of related organs.
C. the primary source of energy.
D. the basic unit of life.
Answer:
D: the basic unit of life
Answer:
Okay so um I’m not 1000% sure because this question has little to no context but I bel the answer is B
Explanation:
Also love the pfp
Harry is doing a research project on the movement of plants from the ocean to land. He leaned that plants evolved
vascular tissues, which enabled them to pull water from the ground and survive on land. Which is most likely
another adaptation that contributed to the success of land plants?
cell walls?
chloroplasts
waxy cuticle
gametes
Answer:
Waxy Cuticle
Explanation:
Waxy Cuticle retains water. It's the closest in terms of surviving on land. For instance, the plants living in water do not need waxy Cuticle to retain or maintain water. The plants on land requires waxy Cuticle because the temperature is hotter than in the water and they are at higher risk of loosing water during hot seasons and climate. waxy Cuticle aids in their water retention allowing them to adapt to live on land.
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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what process produces oxygen gas in the oxygen cycle?
A. Evaporation
B. Burning
C. Photosynthesis
D. Transpiration
(h) Which one of the following favours the fastest transpiration rate ? (i) A cool, humid, windy day (ii) A hot, humid, windy day (iii) A hot, humid, still day (iv) A hot, dry, windy day
Answer:
Hot temperature, dry and windy environment causes fastest transpiration rate.
option IV
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.
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
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?
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 IS PHOTOSYNTHESIS ??
[tex] \huge \boxed{\mathfrak{Question} \downarrow}[/tex]
What's photosynthesis?[tex] \large \boxed{\mathfrak{Answer \: with \: Explanation} \downarrow}[/tex]
Photosynthesis is the process in which green plants derive their food (nutrients and water) through the capturing of light energy (sunlight) and using it to convert carbon dioxide (CO2) and water (H2O) into oxygen (O2) and other substances (compounds) that are rich in energy. Chlorophyll a green pigment present in plants is used in this process.
__________________
Formula ⟶ [tex]\boxed{\bf\:6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6 + 6O_2} [/tex]
__________________
So, the products of photosynthesis are [tex]\large\boxed{\boxed{\bf\:C_6H_{12}O_6 + 6O_2}}[/tex]
