Answer:
white blood cells also called leukocytes
9th grade Biology question help me please
Answer:
it has a high concentration
what transports electrons from the light reactions to the calvin cycle?
Answer:
NADPH
Explanation:
What transports electrons from the light reactions to the Calvin cycle? NADPH is an electron carrier that picks up electrons in the light reactions and releases them in the Calvin cycle. ... The Calvin cycle is a complex series of chemical reactions carried out in the stroma. there you go
a hormone that can lower blood levels of calcium ion is
Answer: Calcitonin
Explanation:
When calcium levels in the blood is low, Parathyroid hormone is released to increase it. On the other hand, when calcium levels are high and need to be decreased, Calcitonin is secreted.
Calcitonin acts in opposition to PTH by inhibiting osteoclasts (a cell from which bone develops), stimulating osteoblasts, and increasing the excretion of calcium into the urine by the kidneys. [lumencandela]
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Answer:
all of these words relate to human impacts on the environment
Explain the difference among the three types of chemical weathering caused by water.
Why would the cell theory change over time?
Answer:
The invention of the microscope led to the discovery of the cell by Hooke. While looking at cork, Hooke observed box-shaped structures, which he called “cells” as they reminded him of the cells, or rooms, in monasteries. This discovery led to the development of the classical cell theory.
Explanation:
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Which organelle's function is storage of water, food, or waste?
O lysosome
O nucleus
O rough ER
O vacuole
Answer:
Vacuole
Explanation:
The vacuole's function is to store water, food, or waste.
The nucleus is basically the "control center" or "brain" of the cell.
Lysosomes are basically the digestive system of the cell
Rough ER produces proteins.
Which of the following is true about DNA replication?
Answer:
c) All of the choices are correct
Explanation:
Answer:
A. ( answer)
Enzymes break the hydrogen bonds between the nitrogenous bases to separate the two strands of DNA.
Explanation:
DNA replication involves several different enzymes. Enzymes break the hydrogen bonds between the nitrogenous bases to separate the two strands of the DNA molecule. Then an enzyme called DNA polymerase joins individual nucleotides together to form the new complementary strands of DNA. Lastly, the DNA polymerase "proofreads" each new strand to make sure that each DNA molecule is perfect, or a nearly perfect copy of the original molecule.
what is the defining characteristic of eukaryotic cells?
Answer:
It has a true membrane-bound nucleus and has other membranous organelles that allow for compartmentalization of functions..
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Much of what we know about our solar system is based on________?
A) observations of younger, nearby star systems
B) planets, planetary objects
C) computer simulations, and models
D) all the above
Answer:
B) planets, planetary objects
Explanation:
Solar system was formed about 4.5 billion years ago.We all know that solar system is made up of planets,stars, planetary objects,etc.define mutation and compare gene mutation and chromosomal mutation
Answer:
In biology, a mutation is an alteration in the nucleotide sequence of the genome of an organism, virus, or extrachromosomal DNA. Viral genomes contain either DNA or RNA.
Explanation:
During fertilization in Choose... two fertilization events take place. One fertilization produces the choose... . Another fertilization event produces the Choose... that nourishes the seedling as it grows.
Answer:
angiosperms
Zygote
Endosperm
Explanation:
During fertilization in angiosperm, two fertilization events take place. One fertilization produces the zygote another fertilization event produces the endosperm that nourishes the seedling as it grows.
What is the fertilization process in angiosperms?Angiosperms are characterized by a double fertilization event in which one fertilization produces the zygote and the other produces tissue, called endosperm, within the seed.
After double fertilization, a post-fertilization event occurs, that specify triple fusion, the PEN (primary endosperm nucleus) then grows into the endosperm.
Therefore, in this event, one sperm fuses with the egg to form the 2n zygote, and the other sperm fertilizes with two polar nuclei to create the 3n endosperm is known as double fertilization.
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Studies have linked cigarette smoking exposure to radon gas and exposure to asbestos fiber with lung cancer the model here shows the cell cycle of a cancerous cell according to he information regarding causes of lung cancer and the model of a cancer cell cycle
what statement describes how these risk factors lead to lung cancer ?
A) the risk factors increase the size of lung cells
B) the risk factors increase the size of the genome in the lung cell
C) the risk factors cause changes to genes that regulate the cell cycle
D) the risk factors decrease the ability of the affected cell to divide
Answer:
It's B
Explanation:
Answer: C) The risk factors cause changes to genes that regulate the cell cycle
Explanation:
You noticed that a plant in your garden began to wilt because you forgot to water it. You water the plant. About 30 minutes later, you discover that the plant is standing again. How is this scenario related to osmosis?
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a plant with two dominant or two recessive alleles is said to be
Answer: H0m0zygous
Explanation: Because H0m0zygous is having two identical alleles of a particular gene or genes.
why does your body release a little bit of energy with each step rather than all at once?
In has been observed that during the process of cellular respiration, electrons from glucose move gradually through the electron transport chain in the direction of oxygen, passing to the lower energy states and releasing energy at each step.
How glucose used in cellular respiration?During the process of aerobic cellular respiration, glucose reacts with the oxygen which leads to form ATP ( Adenosine triphosphate) that has to be used by the cell. Carbon dioxide and water has been created as the byproducts. The overall equation for the process of aerobic cellular respiration is that during cellular respiration, glucose and oxygen react in order to form ATP ( Adenosine triphosphate).
Adenosine triphosphate has known as an organic compound which provide energy to living organisms to drive many operations in living cells such as contraction of molecule, muscle pumps, nerve impulse propagation, condensate dissolution, and chemical synthesis.
The energy consumed by the animals in the form of glucose has been conserved because it is transformed into the chemical energy as the carbon dioxide has been produced during the respiration.
Therefore, In has been observed that during the process of cellular respiration, electrons from glucose move gradually through the electron transport chain in the direction of oxygen, passing to the lower energy states and releasing energy at each step.
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what may affect the rate of an enzyme-driven reaction
Answer:
Several factors affect the rate at which enzymatic reactions proceed - temperature, pH, enzyme concentration, substrate concentration, and the presence of any inhibitors or activators.
Explanation:
El cerebro es el órgano principal del Sistema_______y aquí se encuentran las_______
Answer: nucleus, mitochondrion
Explanation: just did it
Define the
difference between endangered
species and extinction
Answer:
endangered species means ths animals are going to be extinct extinction means the they are already dead
Subsidies and tax breaks to companies are?
A. Helpful to the environment
B. Not helpful to the economy
C. Not helpful to the company
D. Not helpful to the environment
Answer:
A Helpful to the environment
Symptoms of sleep apnea include which of the following?
Answer:
All of the above
Explanation:
the most significant difference between biofuels and fossil fuels is that biofuels are:
The most significant difference between biofuels and fossil fuels is that biofuels are: produced with biomass, that is, they are processed energy resources that come from organic compounds extracted from wild or cultivated plants.
Fossil fuels (such as oil, coal, and natural gas) are those that come from the natural decomposition of organic matter.
They are called non-renewable energies because they are limited natural resources since they require an extensive period of time and specific conditions to form.
On the other hand, a biofuel is a term that is used to refer to all those fuels produced from biomass, that is, through the chemical or physical treatment of organic or plant waste.
That is, unlike fossil fuels that come from energy stored for long periods in fossil remains, biofuels come from biomass, or organic matter that constitutes all living beings on the planet.
Biomass is a renewable energy source, as its production is much faster than the formation of fossil fuels.The use of biofuels as a renewable energy source can help reduce the consumption of fossil fuels, responsible for the generation of greenhouse gas emissions.During its production, part of the carbon dioxide that could be released into the atmosphere is extracted from the biomass.
For this reason, biofuels do not contribute to the emission of greenhouse gases.
Therefore, we can conclude that the most significant difference between biofuels and fossil fuels is that biofuels are: produced with biomass.
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HURRY! Pls. What occurs when molecules use ATP to pump molecules from one side of a membrane to the other?
Diffusion
Active transport
Stimulus
Conversion
Answer:
Active transport
Explanation:
Since it is using energy (ATP) to transport molecules, it is transporting the molecules using active transport.
A family wants to adopt a dog that has very thick fur and cannot be exposed to temperatures above 90 degrees Fahrenheit. This family should only adopt this dog if they live in an area that has which climate properties?
A High average temperatures
B High average rainfall
C Low average rainfall
D Low average temperatures
Answer:
low average temperatures
Explanation:
low average temperatures so the dog doesn't overheat
Answer:
The answer should be D.
Explanation:
A doesn't work - because the dog cannot be exposed to high temps.
B doesn't work - regardless of rain or not, there's always humidity.
C doesn't work either (see B's explanation)
D seems to be the only correct answer.
Here is a graph of the products of an enzyme reaction versus time. what is the rate of this reaction
Answer:
2.5 mg/s
Explanation:
i got it right
1. What type of cell undergoes meiosis?
Answer:
Animals cells and plant cells.
Explanation:
What substance is used to make up nerve fibre
Answer:Myelin is a lipid-rich (fatty) substance that surrounds nerve cell axons (the nervous system's "wires") to insulate them and increase the rate at which electrical impulses (called action potentials) are passed along the axon.
Explanation:
which of these body cavities is located on the front side of the body?
Answer:
Ventral. The ventral cavity, the interior space in the front of the body, contains many different organ systems. The organs within the ventral cavity are also called viscera. The ventral cavity has anterior and posterior portions divided by the diaphragm, a sheet of skeletal muscle found beneath the lungs
Explanation:
What is not a key fluid or molecule that excretion balances?
Nitrogenous waste
Water
Salt
Lymph