b) coronary-artery disease
Which structure is an important site for early blood cell formation and is the first of the extraembryonic membranes to form
Yolk sac is a structure that has a short duration in intrauterine development and is an important site for early blood cell formation.
What is the yolk sac?It is the bag that houses yolk inside and that allows the embryos of certain species to feed in the initial stages of development.
Due to this structure, the embryo receives oxygen and nutrients and can discard its waste, in the case of the human being, the yolk sac fulfills the functions of the circulatory system, until the internal circulation begins to develop.
Therefore, we can conclude that the yolk sac is a structure that has a short duration in intrauterine development and is an important site for early blood cell formation.
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Animals that live in the desert question 15 options: hibernate in the winter are usually nocturnal usually have thin skin to absorb water includes camels. moose, and various reptiles
Animals that live in the desert are usually nocturnal as it helps in avoiding heat of the day.
What is nocturnal?All desert animals are nocturnal as they have the ability to come in night only.
Many wasteland animals are nocturnal for the glaring cause that this enables them keep away from the warmth of midday. In scorching-warm elements of the world, being nocturnal is truely a very good move. Water conservation is likewise a thing of fending off the warmth of the day.
Thus explained.
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When a primary follicle enlarges, and there are several layers of granulosa cells, it is called a:.
A follicle with a single layer of cuboidal granulosa cells is called a primary follicle. A follicle with more than one layer of granulosa cells is called a secondary follicle. Eventually, fluid-filled vesicles occur n the granulosa cell layer, forming early antral follicles.
What is a secondary follicle?A secondary ovarian follicle is a maturing ovarian follicle including of an oocyte encircled by two or more layers of tall, keeping granulosa cells.
Thus, A secondary ovarian follicle is a maturing ovarian follicle consisting of an oocyte surrounded by two or more layers of tall, supporting granulosa.
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Where does the energy in a food web come from or originate?.
Answer:
The energy in the food web ultimately originates from the sun. Energy travels from the sun to the earth in the form of electromagnetic radiation. Autotrophs (primary producers) are able to capture this energy and convert it into sugar molecules via photosynthesis. These sugar molecules provide the energy that travels up the food chain as consumers eat other organisms.
So, the answer is: The Sun.
A student mixed a sample of urine from a person with benedict solution and the heated colour changes to orange. What was present in the urine sample
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An introduction of outside alleles will change the allele frequencies in a gene pool and increase genetic diversity. which of the following does this describe? migration genetic drift gene flow directional selection
The statement describes genetic drift, it can also describe gene flow and Natural selection.
What is Genetic Drift?Simply put, genetic drift is defined as the alteration in the frequency of a gene resulting in the displacement of some other gene permanently.
It should be noted that this increases genetic diversity.
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Answer: genetic drift
Explanation:
I need help with this. It’s a test and it’s part of it I don’t know how to do it and I have more like 6 pages of it and I don’t know any of it .
find the area of a circle with a diameter of 40feet
The ability for people to roll their tongue is dominant to people who cannot. If a tongue roller and a non-tongue roller were crossed, the highest percentage of potential non-tongue roller offspring would be which of the following?
Answer:
50%
Explanation:
Tounge rolling is a dominate trait, so that means it would have to have at least 1 captial letter in it't genotype (assuming captial letters refer to the dominate trait). But, because the demonate trait covers any non-dominate traits, you can have a lower case letter in the genotype while still having someone be a tounge roller (assuming lower case letters are non-dominate traits)
Because non-tounge rollers are non-dominate, they must have two lower case letters in their genotype.
This leaves you with the two genotypes of :
AA or Aa (tounge rollers)
aa (non-tounge rollers)
When crossing AA with aa in a punette, every outcome is Aa. This leaves you with no potentional non-tounge rollers. But, you can still cross Aa with aa, because as said before Aa has a dominate gene, so it would result in someone with the tounge rolling ability.
When crossing Aa and aa in a punnet sqaure, you can get outcomes. Aa or aa. 2 of teh 4 options are Aa, and 2 of teh four options are aa. This means half, or 50% of the offspring are predicted to be non-tounge rollers, showing the high ercentage must be 50%.
what kind of science fair projects can I do that has two variables.
I will give brainliest to the best answer.
Answer:
Ethylene gas or pill bugs
Explanation:
The ethylene gas experiment is basically finding out if the plant hormone, ethylene, keeps leaves on the stem healthier. have a bag with a apple and a tree steam with any number of leaves on it then have the control with a tree stem that has the same number of leaves but no apple.
The Pill bug (rollie-pollies) experiment is try to determine whether or not pill bugs prefer a dry or damp environments.
The cross-fertilization of two different, but true-breeding, varieties of pea plants will _____.
Answer: Result in Hybrid Plants
Explanation:
The cross-fertilization of two different, but true-breeding, varieties of pea plants will result in hybrid plants.
From a classification standpoint, which of these organisms shares the LEAST similarities with humans?
Answer:
hair
Explanation:
All animals have hair, not only that one
Which types of cells contain two copies of each chromosome?
Answer:
cells in the germ linelineline
Explanation:
which go on to provide gametes, or egg and sperm cells.
I need to know what most likely will affect this ecosystem if the vegetation population decreases drastically
Answer:
well a lot of anmials would die from lack of food and that would affect the poeple to since we eat animals
Explanation:
We need plants just like them
In what step of protein synthesis, is mrna made and carried out of the nucleus?.
transcription (before translation)
What is gobal warming ?
A. A decrease in earths average surface temperature.
B. An increase in earths average surface temperature.
C. A decrease in the amount of deforestation.
D. An increase in the concentration of ozone.
Answer:
b
Explanation:
because global warming is caused by an increase in earths temperature
Herbivores, carnivores, omnivores are subclasses of ________, meaning they have to eat to consume energy.
Answer:
Heterotrophs
"Herbivores, carnivores, omivores...."
The increased speed and effectiveness of a second immune response to a pathogen is due to the presence of ____________.
Answer:
Memory Cells
Explanation:
Initiates antibody production if antigen is encountered again.
What is the energy balance or energy budget in relation to the sun and earth?.
Answer:
all of the engergy that fuels the earth comes from the sun
Explanation:
i hope this helps
Habitat fragmentation is
caused by
Answer: human activity
Explanation:
What process releases energy stored inside carbohydrates? How do you know this is correct?
Answer:
The energy is released by respiration involving the steps of glcolysis kerb cycle and ETC
THE MOST ENRGY I RELEASED IN ETC AS IT IS THE ENERGY RELEASING STAGE IT PRODUCES ALMOST 34 ATP FROM A TOTAL OF 38 IN AEROBIC RESPIRATION
Explanation:
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what is the term used to describe having a trait that can be passed on to subsequent generations that increases the organisms ability to survive in its environment and reproduce?
A) genetic variation
B) fitness
C) natural selection
D) adaptation
D) adaptation
Explanation:An organism's ability to adapt to its environment is referred to as an adaptation. To describe changes in a population's DNA as a result of natural selection, the term can also be used.
I hope this helps you
:)
Answer:
The person above me is correct! The anser is D) adaptation.
The appendix usually resides on which region of the large intestine?.
Answer:
A tube-shaped sac attached to and opening into the lower end of the large intestine in humans
Which of the following would a groundwater hydrologist study?
O a pond
O a lake
O an aquifer
O a river
A hydrologist would study an aquifer.
What do you mean by Hydrologist?A hydrologist may be defined as a person who studies water present on the earth's surface and determines all possible characteristics, levels of contamination, and supply of particular water resources.
An aquifer assists in filtering groundwater by compelling it to perish through small pores and between sediments. It helps in the removal of impurities present in the water.
Therefore, hydrologists prefer an aquifer to study groundwater.
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Answer:
Career Profile: Hydrology Quick Check
Explanation:
Why do scientists measure levels of dissolved oxygen in water? - to analyze water quality
What do hydrologists study? - water
Which of the following would a groundwater hydrologist study? - an aquifer
Red hair may have evolved in Neanderthals and then was introduced into human populations via interbreeding. If this is true, this would be an example of
A. gene flow.
B. genetic drift.
C. the founder effect.
D. natural selection.
E. gene pooling.
What is in a snooks diet. And also the habitat.
Answer:
Larval and small common snook eat mainly copepods and microcrustaceans. As common snook grow larger they eat fish, shrimp, crabs and zooplankton. This change in food habits occurs at around 1.8 inches (4.5 cm) standard length and continues throughout adulthood. Adult common snook inhabit many environments including mangrove forests, beaches, river mouths, nearshore reefs, salt marshes and sea grass meadows. Adult common snook appear to be less sensitive to cold water temperatures than larvae or small juveniles.
Explanation:
What will happen to our environment if we consume too much of our needs and waste it?
Answer:
The more emissions that we produce due to how much trash we generate, affects us long term. One can develop diseases such as asthma, birth defects, cancer, cardiovascular disease, childhood cancer, COPD, infectious diseases, low birth weight, and preterm delivery.
Isometric exercise strengthens muscles without __________. A. contracting muscle fibers B. changing muscle length C. burning calories D. conscious effort Please select the best answer from the choices provided. A B C D
Answer:
B. Changing muscle length.
Explanation:
Isometric exercises are stationary/static forms of exercise. They include contractions of the muscle without the movement of the affected joints. There is no change in length of the muscles since the joints are static.
Which location experienced a historic landslide?
Gulf of Mexico
Big Thompson
Mount Saint Helens
St. Louis, Missouri
Answer:
Mt. St. Helens
Explanation:
In 1980, the explosion of Mount St. Helens in the state of Washington, United States, triggered the largest landslide ever recorded.
Answer:
Mount Saint Helens
Explanation:
What is the name of Earth’s innermost layer?
Answer:
Earth core or inner core
Explanation: