Answer:
The unified cell theory states that: all living things are composed of one or more cells; the cell is the basic unit of life; and new cells arise from existing cells
Which biological scenario(s) best describes phenotypic plasticity for a trait?
I. Each person has a specific blood type.
II. Red blood cell counts differ in higher altitudes.
III. One identical twin is taller than the other.
A)I only
B)II only
C)II and III only
D)I, II, and III
Answer:
C) II and III only
Explanation:
Option 1 is not an example of phenotypic plasticity because each person is born with their own blood type and this doesn't change based on their environment and behavior.
Option 2 is an example of phenotypic plasticity because a person's red blood cell counts can increase based on their environment, i.e. moving to Denver, CO from Death Valley, CA. The higher elevation and decreased oxygen causes your body to produce more red blood cells.
Option 3 is an example of phenotypic plasticity because one twin can be taller than another because of differing behaviors, environments, etc.
What did the German biologist Theodor Schwann conclude?
Answer:
German biologist Theodor Schwann concluded that Cinimals are made of cells. Rudolph Virchow concluded that new cells are produced from other cells 6. The Cele theory combines the conclusions made by Schleiden, Schwann, and Virchow.
Explanation:
do electrons live in the atom
Answer:
yes
Explanation:
electrons life in the nucleus which is at the center of the atom
Answer:
Protons and neutrons are heavier than electrons and reside in the nucleus at the center of the atom. Electrons are extremely lightweight and exist in a cloud orbiting the nucleus.
hope this helps!!:)
Explanation:
Which of the alleles for the OCA2 gene is dominant? Which is recessive?
Answer:
Dominant is the regular colored skin or melanin, and the recessive is albinism
For the OCA2 gene, dominant allele is the regular colored skin or melanin, and the recessive is albinism.
What are the functions of OCA2 genes?The OCA2 gene provides instructions for making a protein called the P protein. This protein is located in melanocytes, which are specialized cells that produce a pigment called melanin.
Several common variations in the OCA2 gene reduce the amount of functional P protein that is produced. Less P protein means that less melanin is present in the iris, leading to blue eyes instead of brown in people with a polymorphism in this gene.
OCA2 is the most common type of albinism in African Black OCA patients. The overall prevalence of OCA2 is estimated to be 1:36,000 in the USA, but is about 1:10,000 among African Americans.
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What is the advantage of sexual reproduction in lycophytes?
The advantage of sexual reproduction in lycophytes is the occurrence of variation in organism.
The main advantage of sexual reproduction in lycophytes is the happening of variation in the physiology as well as genetic characteristics of the plant. Lycophytes usually produce spores which is a type of asexual reproduction in which identical type of offspring produce from the spores.
While on the other hand, if the lycophytes reproduce from sexual reproduction then different types of offspring produce which has different characteristics then its parents so we can conclude that the advantage of sexual reproduction in lycophytes is the occurrence of variation in organism.
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All of the following are reasons for regulation of gene expression in eukaryotes EXCEPT -
Answer:
i thinnk its d
Explanation:
The main reason for regulation of gene expression in eukaryotes is cell repair and replacement.
What is gene regulation?Gene regulation is the process used to control the timing, location and amount in which genes are expressed. The process can be complicated and is carried out by a variety of mechanisms, including through regulatory proteins and chemical modification of DNA.
Regulation of gene expression, or gene regulation, includes a wide range of mechanisms that are used by cells to increase or decrease the production of specific gene products.
Hence, gene expression is controlled on two levels. First, transcription is controlled by limiting the amount of mRNA that is produced from a particular gene. The second level of control is through post-transcriptional events that regulate the translation of mRNA into proteins.
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Which is not a purpose of the skeleton system
•movement
•respiration
•protection
•support
Help me plz quick I’m being timed
Answer:
Respiration
Explanation:
That's breathing system
What is not a bacterial shape a.polyhedral b.bacilli c.cocci d.spirillum
Answer:
A. POLYHEDRAL
Branches are what part of the plant?
Answer:
A branch is a secondary wood limb growing from the trunk of a plant. It helps transport materials from the tree trunk to the leaves. The trunk is a massive primary stem of a tree located between the roots and upper tree canopy.
Explanation:
I hope this helps<3
Answer:
A branch is a secondary wood limb growing from the trunk of a plant
Explanation:
It helps transport materials from the tree trunk to the leaves. The trunk is a massive primary stem of a tree located between the roots and upper tree canopy.
60 POINTS!!!!!!!!!!!!!!!!!!
What is NOT an issue regarding DNA identification?
Select one:
a.
There is disagreement about whose DNA should be included in the database.
b.
It is not very reliable.
c.
Private information related to people's genetic makeup, which could get out and result in discrimination against them on that basis.
d.
Having databases of millions of DNA profiles can result in more incorrect coincidental matches with partial samples.
Answer:
its A
Explanation:
In the equation H2 + O2 --> H2O, H2O is the
product
gas
reaction
equation
Answer: the product
Explanation:
Answer:
product
Explanation:
what causes the Coriolanus effect
What are 4 Steps to complete a punnet square?
Answer:
1. Create a key showing traits
2. Make a list of possible allele combinations. & the phenotypes that each would have.
3. Identify the parents that are being used
4. Draw a Punnett square to determine the genotypes and phenotypes.
hope this helps!!:)
Explanation:
PLEASE HELP ASAP!!!!
How can the length of a DNA fragment the estimated in gel electrophoresis?
A. Larger fragments travel faster and father than smaller fragments.
B. Smaller fragments travel faster and farther than larger fragments.
C. Larger fragments are more negatively charged so they travel farther.
D. Smaller fragments or more negatively charged so they travel farther.
Answer:
B. Smaller fragments travel faster and farther than larger fragments.
Explanation: Shorter molecules move faster and migrate farther than longer ones because shorter molecules migrate more easily through the pores of the gel. This phenomenon is called sieving. [2] Proteins are separated by charge in agarose because the pores of the gel are too large to sieve proteins.
What living materials are used in preclinical testing?
Answer:
Preclinical studies refer to the testing of a drug, procedure or other medical treatment in animals before trials may be carried out in humans.
Septa are..
O external cross walls in hyphae
internal cross walls found in hyphae
O always found in hyphae
O a fungal reproductive structure
Answer:
septa are thin walls or partitions between the internal chambers.
Explanation: I wasn't really good at septas but i think this is correct
why would a scientist use a transmission electron microscope (TEM) instead of a compound microscope to view a tissue sample?
1.) the TEM will produce an image with a higher resolution
2.) the TEM allows viewing of individual atoms
3.) the TEM image will be three dimensional
4.) the TEM is used for live samples
Answer: A
Explanation: At a maximum potential magnification of 1 nanometer, TEMs are the most powerful microscopes. TEMs produce high-resolution, two-dimensional images, allowing for a wide range of educational, science and industry applications.
Mark brainliest pls
scientist use a transmission electron microscope (TEM) instead of a compound microscope to view a tissue sample, the TEM will produce an image with a higher resolution. Thus option 1 is correct.
What are the different parts of microscope ?
A microscope is an instrument which produces large images of tiny objects and provide observer a close view of minute structures at a convenient scale for examination and analysis.
Anatomically the microscope has three structural parts, i.e. head, base, and arm, where head is known as the body and it carries the optical parts in the upper part of the microscope.
Base is used to support and carries microscopic illuminators and Arms which connect the base and the head and the eyepiece tube to the microscope base.
The optical parts are used to view, magnify, and produce an image from a specimen placed and the various pars are Eyepiece or ocular situated at the top of the microscope with standard magnification is 10X, Eyepiece Tube carries the eyepiece just above the objective lens.
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If a frog cell with 2n = 26 undergoes mitosis one of the daughter cells would have _____ chromosomes and if that frog cell with 2n = 26 undergoes meiosis one daughter cell would have ____ chromosomes?
-------
A.) 13 – 13
B.) 26 – 26
C.) 26 – 13
Answer:
C.) 26 - 13
Explanation:
During mitosis, DNA is replicated during the S phase so that when the cell divides the daughter cells will have the same number of chromosomes that the parent cell had.
DNA replication also occurs during meiosis, but the cell divides twice, so the daughter cells will have half the number of chromosomes that the parent cell had. This is because the daughter cells are sex cells, which combine with another sex cell (either an egg or a sperm) to form one cell with a combined chromosome number.
What is the difference between Active and Passive Transport?
Answer:
Active transport moves molecules and ions from lower concentration to higher concentration, passive transport moves molecules and ions from a higher concentration to lower concentration without any energy.
Explanation:
Active transport moves molecules and ions from lower concentration to higher concentration with the help of energy in the form of ATP. On the other hand, passive transport moves molecules and ions from a higher concentration to lower concentration without any energy.
Submit Test
Chromosomes from a mother and a father combine during fertilization. What does
the offspring of two parents inherit through these chromosomes?
energy
gones
organelles
resources
8. Based on the DNA base pairing rules, would cells always have the same amount of cytosine and
guanine molecules? Explain your answer,
Answer:
Chargaff's rules state that DNA from any species of any organism should have a 1:1 stoichiometric ratio (base pair rule) of pyrimidine and purine bases and, more specifically, that the amount of guanine should be equal to cytosine and the amount of adenine should be equal to thymine.
Why is the Sun considered “the boss” of the water cycle?
Answer:
The sun is the start of the water cycle
Explanation:
Water can not evaporate without the sun.
i need help im not good with science
 what is abbreviation for heterozygous?
Answer:
The answer is Aa
Explanation:
I'm assuming that you're referring to the lettering of genes. If that's the case, the answer is Aa. A heterozygous is Aa. Hope this is what you were looking for!
Answer:
The correct answer is Het.
Which of the following is a true statement?
Mechanical pencils are used before drawing pens
A radiograph pen is used to draw lines with different thicknesses
Mechanical pens use thick lead
A radiograph pen is used before a mechanical pencil
its actually agriculture
Answer:
A radiograph pen is used to draw lines with different thicknesses
Explanation:
A radiograph pen is a form of a technical pen that is used in drawing most specifically in architectural and engineering drawing.
It comes in different pointing sizes, or in some cases, the stylus can be disassembled to allow changing and replacing it with different styles of different widths to fit in.
For example, a radiograph pen can use a different stylus with a width of 0.35mm, 0.7mm, or 1.4mm, which in turn gives different line thickness when drawing.
Hence, in this case, the correct answer is "A radiograph pen is used to draw lines with different thicknesses."
what does MBO stand for?
What is the main function of the nervous system?
Answer:
The correct answer is to Transport blood to all parts of the body so that gases, nutrients, and waste products are transported to and from the cells.
Explanation:
The nervous system does not do any of the other functions that are in the blue and orange squares. Hope this helps!
Haploid cell with half number of chromosomes as parent cell. Result of meiosis - sperm (male) and egg (female)
Answer:
The correct answer is - true.
Explanation:
In the meiosis cell division, there are four cells present with n number of chromosomes which means these cells generated from by the meiosis have a half number of the chromosome as their parents. This is the reason this type of cell division is known as a reduction division.
These cells that are produced are sex cells or reproductive cell sperm in male and egg in female all have n number of chromosome number as they have to fuse to form a zygote.
PLS HURRY, I HAVE 1 MINUTE
Does the volume of the fluid near the bottom of the Lava lamp decrease, increase, or stay the same?
Answer:
Hotter
Explanation:
Upon turning on the lava lamp's light, the liquid at the bottom of the container, which is denser, will heat and expand. As the liquid expands, the volume of the liquid increases, and its density decreases.
In the Northern Hemisphere, the summer solstice occurs on ____.
A. June 20 or 21
B. March 20 or 21
Answer:
A. June 20 or 21
Explanation:
In the Northern Hemisphere the summer solstice occurs on June 20 or 21 and the winter solstice on December 21 or 22. The situation is exactly... At the summer solstice, the Sun travels the longest path through the sky, and that day therefore has the most daylight.
