Answer:
Water is needed for the
light-independent reactions of photosynthesis to occur.
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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El cerebro es el órgano principal del Sistema_______y aquí se encuentran las_______
Answer: nucleus, mitochondrion
Explanation: just did it
why is it necessary for plants to have chloroplasts
Answer: In some organisms, chloroplasts play a vital role in the photosynthesis process. The chloroplast receives sunlight's energy and converts it to sugars. In some organisms, chloroplasts play a vital role in the photosynthesis process.
Explanation:
1. What type of cell undergoes meiosis?
Answer:
Animals cells and plant cells.
Explanation:
How do human activities affect the carbon cycle?
The main human activities responsible for it are:-
1) Fuel combustion, deforestation and industrial production (especially cement factories)
2) Increase in population (humans emit nearly 32 gigabytes of carbon dioxide each year).
3) Imbalance in the carbon dioxide cycle (the ocean does not absorb all of the carbon dioxide, and vegetables cannot convert all of the carbon dioxide into oxygen).
[tex] \fbox \red{Hope This Helps}[/tex]
Answer:
I guess is it due to global warming or greenhouse gase
Explanation:
please mark brainiest hope it works out for you
Describe two diseases of the digestive system.
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.
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.
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
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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Which protists obtain their energy from absorbing the nutrients of decaying matter? fungi-like protists
animal-like protists
plant-like protists
all of the above
fungi-like protists
fungi breaks down decaying matter
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:
1. MAINIDEA Describe how cyclins control the cell cycle.
is
Explanation:
They drive the events of the cell cycle by partnering with a family of enzymes called the cyclin dependent kinases (cdk). A cdk is inactive, the binding of a cyclin activates it, making a funcyional enzyme.
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
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:
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:
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
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.
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..
Please hurry this is over due!
I will give you all the points i possibly can i your correct!!
(if you give any bs i will report)
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.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:
can anybody help me with this worksheet? Please
The phospholipid bilayer is composed of fats with Hydrophobic core. If protein channels were absent in the cell membrane, would water soluble nutrients be able to enter or
exit the cell? Explain in terms of the composition of the plasma membrane. In your own words, explain the fluid mosaic model proposed by Singer and Nicholson.
Without the nuclear membrane the cell would collapse and die. Without the cell membrane, any chemical would be allowed to enter. Membranes are very important because they help protect the cell. Materials move across the membrane by diffusion.
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
Check all the characteristics below that describe ATP.
Check all that apply.
stands for “adenosine triphosphate”
is an energy molecule
contains two phosphates
contains energy in phosphate bonds
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Answer:
a d and b I believe edkjfjfjfjsw
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]
What allows water to hold so much energy
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:
hope this helped you sorry if it did not
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: