Answer:
They are the median plane, sagittal planes, coronal (frontal) planes and horizontal (transverse) planes
B) In any population, variation exists. Some bacteria are resistant to antibiotics. Most bacteria die, but the bacteria that are resistant survive and reproduce.
C) In a population of bacteria that are exposed to antibiotics, some bacteria change their genetic make-up and survive. The new genetic make-up is passed on to offspring.
D) There is a change in the environment: an antibiotic is added. Some of the bacteria are capable of changing to the new environment. They survive and reproduce, passing along their favorable traits.
Answer:
The most appropriate answer would be D) There is a change in the environment: an antibiotic is added. Some of the bacteria are capable of changing to the new environment. They survive and reproduce, passing along their favorable traits.
Natural selection refers to the process by which organisms who are better adapted to the change in the environment have better chances for survival and reproduction.
The steps for natural selection can be explained as:
I. Inherited variation: Within a population, organisms often exhibit variations which can be inherited such as color, size, et cetera.
II. Competition: This is the phase in which organisms struggle to survive. During this, species usually produce more offspring as compared to the carrying capacity of the environment.
In the given situation, environment change is the addition of antibiotic.
III. Selection: It is the phase of differential reproduction that is, organisms who are best adapted to the environmental change have better chances to mature to reproductive age. They reproduce and pass the beneficial traits to the offspring.
Bacteria which are better adapted to the new environment survive, reproduce, and pass their beneficial traits to the next generation.
IV. Evolution: Changes in allele frequency in a population accumulate over time and leads to the evolution.
Answer:
a. Protein is a major component of body structures.
Explanation:
Proteins are large, complex molecules made up of amino acids. They play a crucial role in the structure and function of our bodies. Here's why option a is the correct answer:
a. Protein is a major component of body structures: Proteins are the building blocks of tissues in our body, such as muscles, bones, skin, and organs. They provide structural support and help maintain the integrity of our body.
b. Supplies 9kcal per gram: This statement is incorrect. Protein supplies 4 calories per gram, not 9. It is carbohydrates and fats that provide 9 calories per gram.
c. Functions as a solvent: This statement is incorrect. Proteins do not function as solvents. They are involved in various functions such as enzyme catalysis, transport of molecules, immune response, and cell signaling, but not as solvents.
d. Is the body's main source of fuel during physical activity: This statement is also incorrect. While protein can be used as an energy source, it is not the body's main source of fuel during physical activity. Carbohydrates and fats are the primary sources of energy during physical activity.
In summary, protein is a major component of body structures and plays a vital role in maintaining the structure and function of our body.
Select one of the options below as your answer:
A.Using the same restriction enzyme for cutting the desired gene and the vector and using ligase for pasting the gene into the vector
B.Using two different restriction enzymes for cutting the desired gene and the vector and polymerase for pasting the gene into the vector
C. Using the same ligase for cutting the desired gene and the vector and a restriction
Answer;
A. Using the same restriction enzyme for cutting the desired gene and the vector and using ligase for pasting the gene into the vector.
In genetic engineering the cutting of the desired gene from its genome, then cutting the vector genome and pasting the gene into it is carried out using the same restriction enzyme for cutting the desired gene and the vector and using ligase for pasting the gene into the vector.
Explanation;
Genetic engineering involves adding a new DNA to an organisms with a goal of adding one or more new traits that are not already found in that organism.
It involves ; the isolation of DNA fragments from the donor organism; the insertion of an isolated donor DNA fragment into a vector genome and the growth of recombinant vector in an appropriate host.
homeostasis
immunity
response to stimuli
reproduction
growth and development
The correct answers are -
b) Homeostasis
c) Immunity
e) reproduction
f) growth and development
Reason -
The endocrine system (produces and secretes hormones) is a vital system as it regulates the homeostasis by regulating the cell activity in the body. The endocrine system releases relevant hormones during specific time period in the blood which are then transported across the blood , this not only maintains the chemical physical balance in our body but also regulate the vital functions of body such as growth, reproduction, and immunity