The structure of a biological membrane consists of a bilayer of phospholipids, housing proteins and cholesterol, with an outward-facing surface adorned with carbohydrate-protein and lipid complexes. The composition allows a fluid movement of proteins within the plane of the membrane, and a selective permeability due to its hydrophobic interior.
The structure of a biological membrane, often referred to as the fluid mosaic model, consists of two layers of phospholipids forming a bilayer. These phospholipids have hydrophilic heads that face outward, one layer exposed to the inside of the cell and the other exposed to the outside. Between these layers, the hydrophobic tails meet, creating a hydrophobic interior.
The proteins are embedded within this phospholipid bilayer and can move freely within the plane of the membrane. Cholesterol is also present in the biological membrane contributing to its fluidity. Some of these proteins also serve to transport materials into or out of the cell.
Also associated with the phospholipid bilayer are carbohydrates attached to some of the proteins and lipids on the membrane's outward-facing surface. These form complexes that function to identify the cell to other cells.
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B. Form a hypothesis
C. Test the hypothesis with an experiment
or
D. Draw conclusions
Kathy's survey falls under option D - drawing conclusions. This means she gathered data through her survey and made conclusions on how many of her classmates are left-handed and right-handed.
In the given scenario, Kathy is conducting a type of research to identify the number of her classmates who are left-handed and right-handed. This activity falls under D. Draw conclusions. Through the survey, Kathy is collecting data, analyzing it, and then drawing conclusions based on the information she has gathered.
It's important to understand the steps of scientific investigation: Usually, recognizing a problem is the first step where questions about an observed issue are asked. Forming a hypothesis is the second step where potential answers to the problem are proposed. These hypotheses are then tested through experiments. Finally, conclusions are made based on the results of these experiments.
In this case, Kathy has skipped right to drawing conclusions. Through her survey, she has gathered information and based on that information, she can draw a conclusion on how many of her classmates are left-handed or right-handed.
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A dwarf is a recessive trait. In order for the plant to be shorter, it would have to have 2 recessive alleles. The plant is also purebread so it wont contain the tall allele. The gametes that are possible are tt.
A gamete is a reproductive cell of an animal or plant. In animals, female gametes are called ova or egg cells, and male gametes are called sperm. Ova and sperm are haploid cells, with each cell carrying only one copy of each chromosome. During fertilization, a sperm and ovum unite to form a new diploid organism.
Moreover, the term haploid can also refer to the number of chromosomes in egg or sperm cells, which are also called gametes. In humans, gametes are haploid cells that contain 23 chromosomes, each of which a one of a chromosome pair that exists in diploid cells.
Therefore, the primary function of gametes is to carry out fertilization in sexually reproducible organisms. During fertilization, a male gamete (sperm/spermatozoa) fuses with female gamete.
Learn more about gametes:
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trees get from the acacia
ants?
The bullhorn acacia trees have a mutualistic relationship with the acacia ants, where the ants protect the trees and in return, the trees provide shelter and food for the ants.
Bullhorn acacia trees have a mutualistic relationship with acacia ants. The ants protect the trees from herbivores and other plants that may compete for resources. In return, the trees provide shelter and food for the ants.
The bullhorn acacia tree has specialized structures called Beltian bodies, which are rich in nutrients. These structures are produced by the tree and are specifically meant to be consumed by the ants. The ants also benefit by feeding off nectar produced by the tree's extrafloral nectaries.
Overall, the ants receive food and shelter, while the tree benefits from protection against herbivores and the ability to outcompete nearby plants.
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Answer:
The plants provide food and accommodation in the form of food bodies and nectar as well as hollow thorns which can be used as nests. The ants return this favor by protecting the plants against herbivores
Explanation:
basic.
neutral.
a salt.
Answer:
If the number of solute (sugar) in the environment is less compared to the solute particles present in the inside such condition is called as hypo-tonic conditions.
Explanation:
Then water will move outside the cell.As the solution in which the cell is placed also has a higher concentration of water than the cell does, which makes Osmosis to draw water out of the solution and into the cells. As a result, plant and animal cells both appear more plump when placed in a hypo-tonic solution.