Answer:
The oxygen revolution happened about 2.5 billion years ago. ... Then oxygen started to accumulate in the atmosphere. Oxygen is toxic to anaerobic organisms and this increase in atmospheric oxygen killed much of the life that had evolved to this point generating a huge mass extinction.
Explanation:
A. Mobbing is a behavior that a social group of birds uses to respond to a predator threat to the entire group.
B. Mobbing is a behavior that adult birds use to respond to a
predator threat to nestlings.
C. Mobbing is a behavior that immature birds use to respond to a predator threat to themselves.
D. Mobbing is a behavior that individual birds use to respond to a predator threat to themselves.
after several cycles of cell division, a fertilized cell develops into a hollow ball of cells called a
What are some benefits of meiosis? and mitosis?
Why does it make sense that our sex cells use meiosis?
How might mutations in dna affect an organism?
What do mutations cause?
What are everyday things that can cause mutations?
Answer:
It comes from the woman’s Fallopian tube after fertilization
Explanation:
After the sperm successfully reaches to the woman’s egg it goes to the Fallopian tube and so on
What’s the name of the first human species?
Answer:
Homo erectus. it first spread through africa and eurasia.
pls mark brainliest
Explanation:
Answer:upright man
Explanation:Upright man
Homo erectus
Homo erectus appeared about 2 million years ago and, in several early migrations, it spread throughout Africa (where it is dubbed Homo ergaster) and Eurasia. It was likely the first human species to live in a hunter-gatherer society and to control fire
Punnett squares are grids that show:
A. the phenotypes of an offspring
B. All possible results of a genetic cross
C. Actual results of general crossing (mating)
What are the functions of xylem
Answer:
Xylem provides mechanical support and storage.
Explanation:
The Central Dogma of Biology states that:
"I am the Dog Mother of Biology!!!!"
DNA is translated into RNA and RNA is transcribed into proteins
RNA is transcribed into DNA and DNA is translated into proteins
DNA is transcribed into RNA and RNA is translated into proteins.
Answer:
DNA is transcribed into RNA and RNA is translated into proteins.
Explanation:
The central dogma of biology explains how gene is expressed in living organisms. Genes are segments of DNA that encodes or carry information for useful products called PROTEIN. However, these genes needs to be expressed. Gene expression occurs in two stages viz: transcription and translation.
Transcription is the first process of gene expression involving the synthesis of a RNA molecule from the gene-containing DNA molecule i.e. DNA is transcribed into RNA.
Translation is the second process of gene expression that involves the synthesis of an amino acid sequence from the information contained in the RNA transcript. These amino acid sequence forms the PROTEIN. Hence, RNA is translated into protein, which is responsible for certain phenotypes.
When DNA is being transcribed into mRNA, The C and G go together. The A in DNA would pair up with what in RNA?
X
G
T
U
HELP PLEASE!!
What three major macromolecules are involved in gene expression?
mRNA
DNA
Polypeptides
I just need confirmation if my list is correct.
Answer:
There are three major types of biological macromolecules in mammalian systems.
Carbohydrates.
Nucleic acids.
Proteins.
If water were a nonpolar molecule how would it’s properties be different
Chemical mechanisms that can turn off or reduce an enzyme are _____.
a.) inhibitors
b.) activators
c.) centrioles
d.) vacuoles
Answer:
Explanation:
Chemical mechanisms that can turn off or reduce an enzyme are inhibitors. Explanation; -Enzyme inhibitors are molecules or compounds that bind to enzymes and result in a decrease in their activity. They can bind to an enzyme and stop a substrate from entering the enzyme's active site and/or prevent the enzyme from catalyzing a chemical reaction.
Answer:
Inhibitors
Explanation:
They inhibit enzymatic activity.
what are two fuctional parts of a charged trna
Answer:
An amino acid and an anticodon
Answer:
An amino acid and an anticodon
Explanation:
The anti-codon region in tRNA recognizes the bases in mRNA and then decides whether the amino acid that it has is appropriate for that triplet or codon.
Electromagnetic radiation may be generated by? A) Neutrons moving with constant velocity B) Electrons moving with constant velocity C) Accelerating neutrons D) Accelerating electrons
Answer: A
Explanation: hope this is helpful :)
The _______ nervous system is a part of the automatic system that conserves energy by returning the body to a normal activity level through a lowered heart rate blood pressure.
Answer:
The answer is parasympathetic.
Explanation:
The Parasympathetic Nervous System is one of the two divisions of the autonomic system, which is the system that regulates all our bodily functions, like heart rate and peristalsis.
Hope this helps :)
Lichens and mosses that first live in uninhabited areas are examples of ?
Answer:
primary successions! I hope this helps
Answer:
secondary
Explanation:
match the function to the correct part of the neuron.
Kindly refer the attachment for labelling.
Answer:
A- Receives signal from other neurons
B- Contain the nucleus and cell organelles
C- Protects and insulates the axon
D- Conveys electric signal across a long distance
E- Passes electrical signals to other neurons
Explanation:
A. The "A" part in the image refers to "dendrites" which function to receive signal from other neurons.
B. The "B" part refers to "soma" which contain the nucleus and other cell organelles.
C. The "C" part refers to "Myelin sheath" that protects and insulates the axon.
D. The "D" part refers to "Axon" which is responsible for conveying electric signal across a long distance.
E. The "E" part refers to "Axon terminal" which is responsible for passing or transferring the elecrtic signals to other neurons and dendrites of other neurons receive the signals and the process goes on.
Hence, the match of fucntion with the correct part of neuron is as following:
A- Receives signal from other neurons
B- Contain the nucleus and cell organelles
C- Protects and insulates the axon
D- Conveys electric signal across a long distance
E- Passes electrical signals to other neurons
Answer:
see image below
Explanation:
What is the purpose of meiosis?
Answer:
Genetic variation by crossing over
Produce 4 daughter cells from single parent cell.
Explanation:
What is the basic unit of a nucleic acid and what is it made of? WILL MARK BRAINLIEST!
what is the difference between a medical biochemist and a biochemist
Answer:
Explanations
Biochemistry is literally biological chemistry:the study of the chemical process within and relating to organisms. Biomedicine is medical biology:it really comes down to viewing biological sciences from a clinical perspective ... I hope this help u
Which of the following are functions of proteins?
A)Energy storage
B)Cell signaling
C)Catalyzing chemical reactions
D)Encoding genetic information
Answer:I believe it’s D.
Explanation:
How does a genotype differ from a phenotype?
The sum of an organism's observable characteristics is their phenotype. A key difference between phenotype and genotype is that, whilst genotype is inherited from an organism's parents, the phenotype is not. Whilst a phenotype is influenced the genotype, genotype does not equal phenotype.
Answer:
What is the difference between a genotype and a phenotype? A genotype refers to the genetic characteristics of an organism. A phenotype refers to the physical characteristics. For example, having blue eyes (an autosomal recessive trait) is a phenotype; lacking the gene for brown eyes is a genotype.
Explanation:
Please give me brainlest
A secondary consumer eats
plants
dead material
carnivores
organisms that eat producers
Answer:
Plants.
Explanation:
Secondary consumers are herbivores, so they eat plants.
How were redi’s and pasteur’s experiments similar
Answer:
Both tested the idea of spontaneous generation.
Explanation:
The Redi's and Pasteur's experiment was performed to disprove the theory of spontaneous generation. They proved that life come from the pre existing life by working on the maggots and condition that originates the maggots from the flies.
Write the level of glucose in biological organization?
Answer: It’s bigger than black and white
Explanation:
We done have a hell of a year
Define tissues, please fast
Body Tissues. Tissue is a group of cells that have similar structure and that function together as a unit.
Alcohols and sugars both contain the hydroxyl group. Which property does the hydroxyl group have?
A.
acidic nature
B.
solubility in water
C.
ability to form crystals
Will give BRAINLIEST How did the universe begin?
Answer:
According to big bang model, the universe was born during a period of inflation that began about 13.8 billions years ago. Like a rapidly expanding balloon, it swelled from a size smaller than an electron to nearly its current size.
Initially the universe was permeated only by energy, some of the energy congealed into particles, which assembled into light atoms like hydrogen and helium.
At first the atoms turned into galaxies, then stars and then other elements were forged.
Explanation:
These are what happened when the universe was forming.
Hope it helps.
Each phospholipid is made up of:
O A. Two phosphate groups and two fatty acid chains.
O B. A phosphate group and a fatty acid chain.
O C. Two phosphate groups and one fatty acid chain
OD. A phosphate group and two fatty acid chains.
Replication happens before a cell divides (Mitosis). So, like Mitosis, how many DNA are there after Replication is over? please help me
Answer:
ive done science already and i think its 2 if im wrong im sorry
SCIENCE: Scurvy can be cured if we consume
1 point
cheese, egg yolk
Citrus fruits, tomatoes
nuts,legumes
fish,dark leafy vegetables
Answer:
The answer to this are Citrus fruits and tomatoes
Answer:
Citrus fruits, tomatoes
Explanation:
Scurvy is a condition caused by a severe lack of vitamin C in the diet.
Scurvy is easily treated by adding some vitamin C to your diet, such as fresh fruit and vegetables.
