Answer:
Chomosomes are duplicated during interphase
Brainliest?
A trait is a distinct variable of
a character of an organism
that can be inherited. Which
of the following would be
considered a trait?
A. skin tone
B. eye color
C. green eyes
Several human populations spread throughout the Sahara desert have multiple mutations in Gene R that confers heat tolerance. Independently, a small population of humans in the Mojave desert of California have a unique mutation in Gene Z that also confers heat tolerance. The evolution of adaptation of heat tolerance across all of these populations would be considered an example of _________
Answer:
Variation
Explanation:
Migration into a population from other populations with varying gene frequencies, evolution, or adaptation of heat tolerance is a cause of variation. The allele frequency of the resulting hybrid population would be right in the middle of its original value and the donor population's frequency. In tropical and subtropical ecosystems (Sahara deserts), high temperatures are a significant restriction to human population productivity; they induce morphological and physiological modifications at all times, resulting in significant yield losses but the ability and evolution of human species to cope in this region is as a result of variation.
Guys helpppppp please and I hope y’all have a great day
Answer:
Ok so
Explanation:
1. DNA
2.A , G , C and T
3.The 3-dimensional double helix structure of DNA, correctly elucidated by James Watson and Francis Crick. Complementary bases are held together as a pair by hydrogen bonds.
4.Chargaff's realization that A = T and C = G, combined with some crucially important X-ray crystallography work by English researchers Rosalind Franklin and Maurice Wilkins, contributed to Watson and Crick's derivation of the three-dimensional, double-helical model for the structure of DNA.
5.Created by Rosalind Franklin using a technique called X-ray crystallography, it revealed the helical shape of the DNA molecule. Watson and Crick realized that DNA was made up of two chains of nucleotide pairs that encode the genetic information for all living things.
6. 1869
7.The double helix of DNA is, like its name implies, in the shape of a helix which is essentially a three dimensional spiral. The double comes from the fact that the helix is made of two long strands of DNA that are intertwined—sort of like a twisted ladder.
8. In DNA, the code letters are A, T, G, and C, which stand for the chemicals adenine, thymine, guanine, and cytosine, respectively. In base pairing, adenine always pairs with thymine, and guanine always pairs with cytosine.
9. A gene is the basic physical and functional unit of heredity. Genes are made up of DNA. Some genes act as instructions to make molecules called proteins. ... Every person has two copies of each gene, one inherited from each parent.
10. 20
11. A group of disorders that cause red blood cells to become misshapen and break down.
With sickle cell disease, an inherited group of disorders, red blood cells contort into a sickle shape. The cells die early, leaving a shortage of healthy red blood cells (sickle cell anaemia) and can block blood flow causing pain (sickle cell crisis).
12. Sickle cell anemia is caused by a mutation in the gene that tells your body to make the iron-rich compound that makes blood red and enables red blood cells to carry oxygen from your lungs throughout your body (hemoglobin).
13. The Human Genome Project was an international scientific research project with the goal of determining the base pairs that make up human DNA, and of identifying and mapping all of the genes of the human genome from both a physical and a functional standpoint.
I'm so absolutely sorry if this is long. Good lucj with ur work ;D
Plasma estrogen levels reach their peak at the end of the luteal phase of the ovarian cycle.
a. True
b. False
Answer:
Plasma estrogen levels reach their peak at the end of the luteal phase of the ovarian cycle.
a. True
Explanation:
A woman's estrogen levels become highest towards the end of her ovulation. At this point, the woman is naturally prepared for a possible pregnancy. The occurrence of the highest estrogen levels coincides with the luteal phase, a stage of a woman's menstrual cycle, which occurs after ovulation (or the release of eggs from the ovaries), and before the start of the normal period. This luteal phase has been observed to be within 14 days for all women. By the end of the luteal phase, the corpus luteum function declines.
Fiona wants to use the scientific method to answer the question “Do oxygen levels in the air affect rates of photosynthesis?” She reads about photosynthesis in her biology book and is ready to carry out the next step. What should she do next?
perform an experiment
design a procedure
make observations
form a hypothesis
The first thing Fiona, or anyone, should do is form her hypothesis.
The hypothesis is your own proposed explanation for whatever phenomenon you're trying to study. Think of it as a predetermined idea of what could happen based on what you already know.
Answer:
The correct answer is D!:)
Explanation:
Hope this helps!:)
would occur if we were suddenly thrown back into the “Dark ages” with no use of technology
So there are a lot of people who say that the Dark Ages, lasting about 1,000 years, set humans back technologically. However, some say that since the Dark Ages really only affected Western Europe, and not the Middle East or Asia, it wouldn't make a difference.
If there had been no "Dark Ages" there would have been no Renaissance. Historians actually argue about when Renaissance started, and the answer is than it is not possible to pinpoint a date. The Crusade did more to bring the eastern world to western Europe than they did to divide.
What part of the ice cores tells us what the atmosphere was like in the past?
A.The water when the ice cores melt.
B. The ice crystals.
C. The rings of the ice core.
D.The air bubbles trapped in the ice cores.
Answer:
C
Explanation:
I took the test a few days ago. :)
Which of these is an example of the conversion of gravitational potential energy into kinetic energy?
Group of answer choices
a wind-up spring making a toy car move across the floor
a person running on a level track
an apple falling from a tree to the ground
a rubber band being stretched to twice its normal length
An experiment similar to the 1952 Hershey and Chase experiments was done in which radioisotope 35S was added to a bacteriophage replicating within its bacterial host. The new phage particles were carefully isolated and used to infect fresh bacterial cells and no radioisotopes were utilized. Based on this information, where would you expect to find the 35S radioisotope immediately after infection
Answer:
inside the phage ghosts outside the bacterial cells.
Explanation:
According to Hershey & Chase- Experiments, the radioisotope 35S is frequently associated with protein since sulfur is a protein component. The radioactive sulfur is absorbed into the protein coat because it already contained sulfur (35S). The radioactive marker 35S was integrated into the Bacteriophage protein coat and remained as phage ghosts outside the bacterial cells.
Which of these does not provide information about the geologic history of Earth?
A) fossils
B) ash from volcanoes
C) debris from meteorites
D) current weather patterns
Answer:
is B
Explanation:
volcanic activity was more common in the past than it is today.
constellation are believe to ne of great help in the lives of some people.
True or False
Calculate the number and percentage of eukaryotic species that are still to be formally described?
the number and percentage of eukaryotic species that are still to be formally described is to be beauty
Eukaryotic organisms are species that have defined nucleus and membrane limited organelles. Total 11% or 250,000 are described while 97% or 8490000 are yet to be described.
What is the population of the eukaryotes?Eukaryotes are the largest and the most dominating species that includes kingdom plants, animals, fungi and protists. A total of 8.74 million eukaryote species on Earth are present from which only 250,000 are described.
Eukaryotes are the species that are well-defined organisms that contain the genetic material enclosed within the nuclear membrane and the organelles are also enclosed.
With new discoveries and findings, many new species are described that are grouped into one of the kingdoms based on their properties and features.
Therefore, 8.74 million eukaryote species are present on Earth.
Learn more about eukaryotes here:
https://brainly.com/question/4944603
HELP
Youngest to oldest
Answer:
E B I F H A D G C
Explanation:
Why do so many more people have brown eyes then blue eyes
why does secondary consumers cannot digest the bones of their prey
Answer:
The conclusion to be drawn from the fact that secondary consumers do not digest the bones of their prey is that energy used to create bone mass often does not travel farther up the food chain . Explanation: ... No energy is required to form bones .
Explanation:
Answer:hebivore
Explanation:
I’ll mark u as brainliest! Tell me what definition goes where ?!
Answer:
Codominance- Two traits are both present in a third phenotype.
Incomplete Dominance- Two traits blend to form a third phenotype.
Sex-Linked Traits- Determined by gene located on sex chromosomes.
Explanation:
I hope this helps.
Which of these biological communities has permafrost? A. Tundra B. Grassland C. Desert D Forest
Answer:
the tundra biome :)
Explanation:
grass lands aren't very cold
forests aren't cold
the desert is hot
and tundra is super cold
If more snakes moved into this environment, then
A. the number of rabbits would go up.
B.the number of grasshoppers would go up.
C. the number of toads would go up.
D. The number of hawks would go up.
NO LINKS AND DO NOT ASK A QUESTION UNDER MY QUESTION ❗❗❗
Answer:
B. The number of grasshopers would go up.
Explanation:
A. is incorrect because it would decrease
C is incorrect because it would also decrease
D is incorrect because snakes dont eat Hawks, but Hawks eat them
B is correct because since snakes would eat the toads, there would be no toads eating grasshoppers
Hope this helps!!!
b) What is DNA? What is a Gene?
Which of the following statements about planetary satellites is true?
Answer:
C
Explanation: