Answer:
The mass of Y is 75g
Explanation:
Answer:
Explanation:
75g
Which Scientific model could be used to predict the properties of an element?
(a) closed loop system (b) Punnett square (c) Periodic Table (d) water cycle chart
How many membrane layers cover the nucleus?
Answer:
2 membrane layers cover up the nucleus
Answer:
two lipid bilayer
Explanation:
the nucleus membrane is made up of two lipid bilayer
What groups of organisms are most in danger of extinction?
A. Those with small population
B. Those that migrate or need special habitats
C. Those with large populations that breed quickly
D. Both a and b
Explanation:
D.Both a and B
As organisms with small population and those who migrate and need special habitat are most in danger of extinction.
The group of organisms that are in danger of extinction is those that have small populations and those that migrate or need special habits. So the correct option is D.
What is the extinction of species?
In biology, extinction refers to the extinction or death of a species. Extinction happens when a species' numbers are reduced due to evolutionary changes in its members, such as genetic inbreeding, poor reproduction, and population decline, or due to environmental factors like habitat fragmentation, climate change, natural disasters, and overexploitation of the species for human use.
The majority of species that have ever existed on Earth have gone extinct, but the fossil record indicates five very significant extinctions, known as mass extinction events, each of which resulted in the extinction of enormous numbers of species. The bulk of extinctions, which happen continuously and are described as background extinctions, are separated from these glaring decreases in the variety by the term "mass extinction."
Therefore, the correct option is D.
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PLLLLLLLLLLLLLLLLLLLLLLLLLLLLSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS HELP!
DUE RIGHT NOW
You know we have a ‘leap year’ every 4 years in February right? Make a guess- do you think these dates are exactly the same every year? *Explain completely*
Cell that has a nucleus but not a wall would best be described as
Answer:
organell
Explanation:
Answer:
Animal cell
Explanation:
Animal cells do not have a cell wall but have a nucleus
Vhy did the color of the peppered moth change?
A.The moths' life cycle changed,
B.The environment changed
C.The amount of variation in the moth population changed
D.The number of individual moths in the population changed,
Answer:
the environment changed
Explanation:
The evolution of the peppered moth is an evolutionary instance of directional colour change in the moth population as a consequence of air pollution during the Industrial Revolution. ... Later, when pollution was reduced, the light-coloured form again predominated.
Answer:
B.The environment changed
Explanation:
Which characteristic of life is the car missing that leads someone to conclude it is not alive? Please answer in complete sentences
Answer:
Explanation:
a car does not have the ability to reproduce, or maintain homeostasis. Unlike all living things
Which of the following structures is at the same level organization as the mitochondrion in a plant cell
Answer:
Any other cell organelles would be at the same level of organization as a mitochondria.
what is an example of carbohydrates?
Answer:
Glucose
Explanation:
Glucose is an important carbohydrate. Other carbohydrates include starch, lactose, cellulose, and fructose.
where do cells store waste
Answer:
Vacuoles
Explanation:
HELP ME PLS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Compare the data shown in the table. What reasonable conclusion can be made from the information given?
What impact does an increase in temperature have on the rate of a chemical reaction?
A) Temperature has no effect on the rate of a chemical reaction
B) It decreases the rate of the reaction
C) It increases the rate of the reaction
Answer:
C) It increases the rate of the reaction
Explanation:
Hope this helps!
To increase memory, the author recommends that a
person
А
get fresh air and exercise.
B
spend time indoors at the library.
С
sleep six hours every night.
D
memorize homework assignments.
Answer:
Option B and D Best Support The Statement
Explanation:
To Increase yourself in knowledge one must go to the library and of course memorize their homeworks
please help me lol . it’s easy but i’m rlly lazy :) tysm i’ll mark u blainlist ik it’s a lot of work !!
Answer:
this must be 8th grade work am I correct?
Explanation:
what is ostia in biology
Answer:
An ostium (plural ostia) in anatomy is a small opening or orifice.
Explanation:
Simple term for explaining an opening
Which reason best explains why carbon is able to form macromolecules?
Carbon is a very large element.
Carbon can bond with many elements.
Carbon is found in all living things.
Carbon is found in energy-storing molecules.
Answer:
carbon can bond with many elements
Explanation:
i just did it
Answer:
B
Explanation:
EDG 2021
earths_____ absorbs solar radiation and re-radiates it to earth’s surface
1.
How does water behave when it freezes?
Answer:
During freezing, water molecules lose energy and do not vibrate or move around as vigorously. This allows more stable hydrogen-bonds to form between water molecules, as there is less energy to break the bonds...Thus water expands as it freezes, and ice floats atop water.
Explanation:
ANSWER PLEASEEEEE TYYY
Answer:
A-D
Explanation:
They both lie on the same ring.
I hope this helps! Happy learning, friend :)
Guys help!!!!!!!!!! Pleaseeee it’s urgent
Answer:
The answer is b
Explanation:
PLS HELP!!
WHAT is the meaning of biology? how does chemistry and biology related???
Answer:
Biology is the study of living things.
Chemistry is the study of elements and their properties, reactions, bonds...
Explanation:
Place a checkmark next to each cellular component necessary to build a bacterial cell:
plasma membrane
cell wall
DNA
nucleus
mitochondria
chloroplast
Golgi apparatus
rouch endoplasmic reticulum
smooth endoplasmic reticulum
flagella
Answer: Cell wall, DNA, plasma membrane
Explanation:
Please mark as brainliest if your want!
The cellular component necessary to build a bacterial cell include:
Cell membraneDNACell wallRibosomesCytoplasmFlagellaWhat is Bacteria?These are micro-organisms which can't be seen with the eyes but with the use of instruments such as microscope.
They lack a nucleus and their DNA is usually found in the nucleoid region of the cell.
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When a biological vector is used, which process is used to ensure there are large amounts of DNA?
Answer:
Cloning
Explanation:
It makes the most sence
Answer:
cloning
Explanation:
i looked it up
have a great day!
Based on the description of DNA, given in the Do Now, what could be the nucleotide composition of a DNA double helix? 90 points 20% adenine, 20% guanine, 30% thymine, 30% cytosine 60% adenine, 20% thymine, 10% guanine, 10% cytosine 20% adenine, 20% thymine, 30% guanine, 30% cytosine 60% adenine, 20% guanine, 10% thymine, 10% cytosine
Answer:
20% adenine, 20% thymine, 30% guanine, 30% cytosine
Explanation:
Edwin Chargaff stated in his rule that, in a DNA molecule, the amount of purine bases (Adenine and Guanine) should equate the amount of pyrimidine bases (Cytosine and Thymine). Mathematically, this means that;
A + G + C + T = 100%
Where;
% Adenine base = % Thymine base
% Guanine base = % Cytosine base
Hence, according to this question, the DNA molecule described will contain
20% adenine = 20% thymine,
30% guanine = 30% cytosine
20% A + 20% T + 30% G + 30% C = 100%
Mendeleev developed his table when he placed the elements
in order by increasing atomic number.
TRUE
FALSE
the answer is True
okay
6.which of the following is NOT a main part of the cell?
A cell membrane
B. cytoplasm
C. nucleus
D. ribosome
Explanation:
Its answer is ribosome
Diffusion is the movement of molecules from an area of high concentration of molecules to an area with a ____ concentration.
A. Equal
B. Higher
C. Lower
D. None of the above
Answer:
lower
Explanation:
Diffusion is the movement of molecules from an area of high concentration to an area of lower concentration. So, the correct option is C.
What is diffusion?Diffusion is a type of passive transport, this means that it does not require any kind of external energy for movement of molecules. The difference in concentration in two areas gives rise to a concentration gradient. Where, in one area there is high concentration of molecules and in another, there is low concentration of molecules.
If the molecules move from an area of higher concentration to an area of lower concentration, they are moving along the direction of concentration gradient. This is why no additional energy is required. Diffusion is a type of passive transport where molecules move along a concentration gradient.
This is in contrast to active transport where molecules move against the concentration gradient and therefore require external energy.
Therefore the correct option is C.
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how has limiting factors for the ecosystem impacted pythons in the everglades
Answer:
Explanation:
Non-native Burmese pythons have established a breeding population in South Florida and are one of the most concerning invasive species in Everglades National Park. Pythons compete with native wildlife for food, which includes mammals, birds, and other reptiles. Severe mammal declines in Everglades National Park have been linked to Burmese pythons.
The most severe declines in native species have occurred in the remote southernmost regions of Everglades National Park, where pythons have been established the longest. In a 2012 study, populations of raccoons had dropped 99.3 percent, opossums 98.9 percent, and bobcats 87.5 percent since 1997. Marsh rabbits, cottontail rabbits, and foxes effectively disappeared.
The mammals that have declined most significantly have been regularly found in the stomachs of Burmese Pythons removed from Everglades National Park and elsewhere in Florida. Raccoons and opossums often forage for food near the water’s edge, which is a habitat frequented by pythons in search of prey.
Role of Lipids and Carbohydrates - Type Lipid or Carbohydrate behind each question. 16. Provide long term energy storage. 17. Provide insulation and protection. 18. Short term energy supply 19. Composes cellulose in trees and plants. 20. Main component of cell membranes 21. Provide a waterproof coating on leaves and feathers. 22. Composes chitin exoskeleton of insects. 23. Act as chemical messengers in the body.
Answer:
16. Carbohydrates
17. Lipids
18. Carbohydrates
19. Carbohydrates
20. Lipids
21. Lipids
22. Carbohydrates
23. Lipids
Explanation:
Carbohydrates are organic molecules composed of carbon, hydrogen and oxygen. Carbohydrates can be classified into three types: monosaccharides (e.g. glucose), disaccharides (e.g., lactose), and polysaccharides (e.g., starch). Cellulose is a carbohydrate where many glucose rings chain together, while chitin is a polysaccharide consisting of chains of modified glucose molecules.
Lipids represent a diverse group of organic molecules that include, among others, fats, waxes, oils, hormones, etc. Lipids play a role by insulating (and protecting) the body. For example, there is a layer of fats beneath the skin which enables to maintain body temperature relatively constant. In animals, lipids constitute about 50% of the mass of cell membranes. These membrane lipids are mainly phospholipids, glycolipids and cholesterol. There are hormones that derive from lipids such as steroid hormones, which derive from cholesterol. Some examples of steroid hormones are testosterone, estrogen and cortisol.
A model of an embedded membrane protein is shown above. What is the most likely characteristic of the portion of the protein
indicated by the black circle?
A)
This is a charged region of the protein
B)
This is the polar region of the protein
This is hydrophilic region of the protein
D)
This is the nonpolar region of the protein
Then
Answer:
D) This is the nonpolar region of the protein
Explanation:
cause i just got it right