Answer Options:
a. a virus is much larger in size than a bacterial cell
b. a virus always causes more severe disease than a bacterial cell
c. a virus can never reproduce on its own, but a bacterial cell can
d. a virus does not contain genetic material, but a bacterial cell does
Answer:
c. a virus can never reproduce on its own, but a bacterial cell can
Explanation:
a. a virus is much larger in size than a bacterial cell - this is false, a virus is much smaller than a bacterial cell
b. a virus always causes more severe disease than a bacterial cell - this is false, both can be deadly pathogens
c. a virus can never reproduce on its own, but a bacterial cell can - this is true. Viruses are not cellular and need a host cell to reproduce, but bacteria do not.
d. a virus does not contain genetic material, but a bacterial cell does - this is false, viruses contain either a DNA or RNA genome
Which of the following does NOT describe the heart?
a)The heart has two pumps
b)All of the muscle tissues of the heart do not contract at the same time
c)The heart has two chambers with specific tasks to do
d)Different parts of the heart contract at different times
-Thankyou <3
Answer:
answer is
a) The heart has two pumps
How does interphase prepare cells for mitosis?
Answer:
In interphase there are three phases in which the cell multiplies its contents. DNA is replicated and cell organelles are doubled and all necessary biomolecules are formed. In this way cell gets prepared for mitosis.
Explanation:
What happens to the solar energy that is not absorbed by earths surface?
Answer:
It is absorbed or reflected by clouds, gasses, and dust, or is reflected off of Earth's surface.
Explanation:
Answer:
A small part of the sun's energy is directly absorbed particularly by certain gases such as ozone and water vapor.
During heavy exercise, the blood's volume flow rate is 5-10 times higher than when the body is at rest. Discuss different possible ways that a body can accomplish this
Answer: Two possible ways are aerobic respiration and anaerobic respiration.
Explanation:
Aerobic respiration: During aerobic respiration, the muscles of the body during vigorous exercise experience lack of oxygen as a result heart pumps faster to avail the necessary blood volume of oxygenated blood to all the muscles.
Anaerobic respiration: In the absence of oxygen the glucose stored in muscles is converted into lactic acid and this process avails energy for performing work but also causes cramps in muscles.
In Holstein cattle the spotting of the coat is due to a recessive gene, while a solid-colored coat is dominant. Two heterozygous solid animals are crossed. What would be the expected genotypes and phenotypes of the offspring?
Answer:
In Holstein cattle when two heterozygous animals are crossed for the characteristic coat color, the offspring will be individuals with solid coat and spotted coat in a 3:1 ratio.
Explanation:
Since in Holstein cattle the solid color coat is dominant (S), and the spotted coat is recessive (s), each heterozygous individual has the genotype Ss.
The result of crossing two individuals of Holstein cattle heterozygous can be seen in Punnet's Square:
Ss X Ss
Alleles S s
S SS Ss
s Ss ss
Genotypes
Ss 50%SS 25%ss 25%Ratio of genotypes SS:Ss:ss is 3:1:1
Phenotypes
Individuals with solid color coat 75% (50% Ss and 25% SS). Individuals with a spotted coat 25%.Ratio solid color:spotted color 3:1
Which of the following statements is true?
A. The karyotypes for a male human and a female human will look exactly the same.
B. The number of chromosomes in all organisms is the same.
C. Sometimes, a single gene can influence many traits.
D. There are more chromosomes in a cell than there are genes.
Answer:
the answer is C
Explanation:
Sometimes, a single gene can influence many traits in an organism. This is possible due to gene interactions. Thus, the correct option is C.
What is Gene interaction?Genetic interaction is the set of functional association between different genes in an organism. Genetic interactions are the relationship is called as epistasis. Epistasis is the interaction of non-allelic genes where the effect of one gene in an organism is masked by another gene to result either in the suppression of the effect of that gene or they both combine to produce a new trait or character.
In epistasis, the gene which masks another gene is called as epistatic gene, and the gene whose expression is being masked is termed as hypostatic gene. Epistasis is also referred to as the inter-genic or inter-allelic gene interaction.
Therefore, the correct option is C.
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Why I’m I sad at night.. I happy I’m the morning
I’m sorry that you are sad at night.
What is an effect that results when two genes are located side by side on the same chromosome?
A One gene will cancel out the effects of the other.
B The trait that results causes a genetic disorder.
C Punnett squares can give incorrect predictions of inheritance.
D Both genes will affect the same trait in an additive way.
Answer:
I think its D
Explanation:
please don't be mad if I'm wrong
Answer:
Punnett squares can give incorrect predictions of inheritance.
Explanation:
I just took the test (:
Which statements about salt water are true? Check all that apply.
Salt water contains minerals other than salt.
Fresh water is heavier than salt water.
Objects float more easily in oceans than in lakes or rivers.
The temperature of ocean water is affected by the depth of the water.
The temperature of ocean water is affected by the ocean’s location........HURRY PLS!!!
Answer:
Objects float more easily 8n oceans than I. lakes or rivers.
Answer:
the answers are A,C,D,E
Explanation:
Definition: This is all the water on Earth; the liquid portion of the planet.
Example: oceans, seas, lakes, ponds,rivers
Answer:
The hydrosphere!
Answer:
Hydrosphere definiton: All bodies of water on earth salt water, fresh water, etc
Explanation:
Water vapor inside magma increases its explosiveness.
true or fasle
Answer: True.
Explanation: When the water vapor bubbles try to rise they are impeded by the linkage of silica chains in the magma and can rise only slowly. The rapid change in confining pressure as the magma body rises to the surface causes the dissolved water vapor bubbles to expand and escape explosively.
(Q029) Which of the following statements is FALSE? Group of answer choices Formins promote the formation of unbranched actin filaments. Actin filaments are usually excluded from the cell cortex. Integrins are transmembrane proteins that can bind to the extracellular matrix. ARPs can promote the formation of branched actin filaments.
Answer:
- Actin filaments are usually excluded from the cell cortex
Explanation:
In eukaryotic cells, actin proteins polymerize in order to form filaments. These actin filaments can be localized beneath the plasma membrane, where they form a network that helps to provide mechanical support. This network localized on the inner face of the plasma membrane is called 'cell cortex', which is a specialized structure that is attached to the cell membrane by Ezrin, Radixin and Moesin (ERM) proteins. The cell cortex plays key roles by controlling the cell shape, cell morphogenesis and membrane behavior.
The statement "Actin filaments are usually excluded from the cell cortex" is false.
In point of fact, actin filaments are most frequently discovered in the cell cortex, which is a highly specialised region that is located close to the plasma membrane.
Actin filaments are abundant in the cell cortex, where they serve as a source of structural support and contribute significantly to the processes of cell shape maintenance, cell adhesion, and cell migration. Actin filaments play a pivotal part in these cellular functions.
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What type of macromolecule is cortisol?
why is the cell membrane called the fluid mosaic model? quick if you can please
Answer:
The fluid mosaic model of the cell membrane is how scientists describe what the cell membrane looks and functions like, because it is made up of a bunch of different molecules that are distributed across the membrane. ... The movement of the mosaic of molecules makes it impossible to form a completely impenetrable barrier.
Explanation:
The cell membrane is called the fluid mosaic model because proteins are arranged as a mosaic of particles that can penetrate inwards and even completely pass through the bilayer.
According to this fluid mosaic model, membranes consist of a lipid bilayer (essentially a double layer of phospholipids) in which various proteins are embedded.
The lipid bilayer is the base of the membrane, proteins are normally found "dissolved" in the lipid bilayer, they act as mediators or facilitators of almost all the functions of the membrane, either by transporting specific molecules.It also highlights that the membranes are fluid, dynamic and their components mobile, a very important characteristic that allows the existence of transitory interactions.Finally, this model of the membrane structure proposes that the arrangement of its components is asymmetric and they can have numerous associated carbohydrates.Therefore, we can conclude that the cell membrane is called the fluid mosaic model because proteins are arranged as a mosaic of particles that can penetrate inwards and even completely pass through the bilayer..
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If a cell is old and needs to be destroyed, which
organelle would you use?
Answer:
Lysosomes easy
Explanation:
Cells are the largest unit of life.

Answer:
yea, in science the earth was through bacteria anc in our bodies we can't live without cella
(4 points)
The nitrogen cycle is shown below.
(Nitrates
Decomposition
1
Nitrogen fixing
bacteria
Nitrites
If the nitrogen-fixing bacteria were destroyed by a virus, the most likely result would be
са
Сь
a decrease in the nitrogen gas in the atmosphere
a decrease in nitrogen compounds available to organisms
an increase in nitrates available for plants to use
an increase in nitrates from animal wastes
d
Answer:
The correct answer is - a decrease in nitrogen compounds available to organisms.
Explanation:
Nitrogen fixation is the process that involves the atmospheric nitrogen and converts into a nitrogen compound that can easily be consumed by the organism as nitrogen is one of an essential part of life.
Nitrogen fixation is carried out by the microorganism like nitrogen-fixing bacteria like azotobactor. If these bacteria were destroyed then there will be a decrease in the nitrogen compounds that are consumed by the organism as there is no more nitrogen fixation takes place.
Which factors are most likely to limit population growth in the Atacama desert?
Answer:
it is like being on Mars
Explanation:
it is definitely too hot to live there
Which factors involving the activities of people are a threat to biodiversity?
Answer:
Explanation:
Overexploitation of a species. Take elephants for example. Hunters hunt them down for ivory. Say that there was a disease going around elephants, that is incredibly deadly. Take Bobby the elephant. Bobby the elephant is one of the few that has natural immunity to the virus, and if he were to reproduce he could help save the elephant population. If Bobby was hunted down before he reproduces, the population of elephants are put in danger. Also killing a large portion of a species will make it so that the animals in that species have limited mating partners, which can restrict biodiversity
Would a green plant grow better under a green light or a red light? Explain your answer.
Depending on the plant red lights have different effects on plant growth. Though green lights have the least benefit to help plant growth, it would ussally be better with a red light. However, this all depends on the plant.
Why are recessive traits not seen even though they are present in the alleles?
Answer:
Because if the dominant trait (D) is present, it will in a way, overpower the recessive trait (r), and show the dominantly present trait physically but in the alleles, there might be blue in there also but be overpowered for ex: dominant brown eyes with a blue recessive trait so most likey if you have brown since it takes over
Explanation:
Sorry if this sounds confusing, it sounds way better in my head XP
Hope this helps in any way
Explain how the diagram below shows the evolution of bacteria? (60 POINTS)
Explanation:
Bacterial evolution refers to the heritable genetic changes that a bacterium accumulates during its life time, which can arise from adaptations in response to environmental changes or the immune response of the host. Because of their short generation times and large population sizes, bacteria can evolve rapidly.
During the investigatin, which gas is collected in the test tube in the greatest quantity?
A:carbon dioxide
B:sulfur dioxide
C:ammonia
D:oxygen
Answer: its A
Explanation:
In general, microtubules disassemble and consequently pull the chromatids to the ends of the spindle during ____.
Answer: The options are not given, here are the options.
.a.prophase
b.prometaphase
c.metaphase
d.anaphase
e.telophase
The correct option is C.
Metaphase.
Explanation:
It is metaphase because during metaphase, the chromosomes lined up together and the two sister chromatids join to a particular spindle fiber. The microtubules them bring the sister together chromatids from the opposite spindle poles. The kinetochore microtubules capture the sister chromatids back and forth til they are able to form alignment along the equator of the cell which is called the equatorial plane.
As the concentration of ascorbic acid was increased, did the rate of the formation of the iodine-starch complex increase or decrease? Explain your answer in terms of the chemical reactions involved.
Answer:
yes
Explanation:
as the concentration is'n it
Answer:
it increased
Explanation:
In what cell cycle checkpoint CDK is present?
As a team of explorers travels southward from the North Pole into Canada, they encounter a dense forest of pines and other coniferous
evergreens. They leave the forest before the winter, which is long and cold. Which of these biomes has the team visited?
o A. temperate grasslands
B. Northwest coniferous forest
C. tropical dry forest
O
D. boreal forest (taiga)
Answer:
It's D
Explanation:
Among the options, the name of the biome that the team visited is known as boreal forest (taiga). Thus, the correct option for this question is D.
What is Biome?A biome may be defined as a very large ecosystem that is tunning in nature in a very unmanaged way. It may also be characterized as a very large area that is characterized by a particular type of vegetation. Some examples of biomes may include tropical rainforests, coral reefs, grasslands, etc.
According to the context of this question, taiga (boreal forests) are the types of coniferous forests that are located below the tundra in the biome triangle. These types of biomes may have a dense forest of pines and other coniferous evergreens. They leave the forest before the winter, which is long and cold. They generally possess temperatures lower than the temperare or tropical forests.
Therefore, the name of the biome that the team visited is known as boreal forest (taiga). Thus, the correct option for this question is D.
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identify the values and describe the attitudes that have contributed to pollution problems like those at herculaneum. how would you feel if you lived in herculaneum
Answer:
Herculaneum was an ancient town in Italy. Herculaneum has faced a lot of problems related to pollution that are contributed by humans.
During the eruption, the bones of hundreds of victims were left in the beach sites in the open air and the disintegration of dead bodies caused a lot of pollution in the area. Lead contamination is a common issue in Herculaneum that is creating environmental health hazards such as pollution. Plants and vegetation are rarely supported in Herculaneum people that increases the effects of pollution.
If i would have lived in Herculaneum, I would have felt suffocated in such an environment where there is a lot of pollution and I would try to plant some trees or vegetation nearby to support environmental health.
Where is the gas-exchange surface in the bird respiratory system, i.e. where does oxygen enter the blood and carbon dioxide leave the blood
Answer:
the lungs
Explanation:
The avian respiratory system consists of three sets of organs that perform respiration: lungs (where gas exchange occurs), anterior air sacs and posterior air sacs. The lungs have static structures with surfaces that enable gas exchange, and air sacs that enable the unidirectional flow of air through the lungs. Birds have a very efficient respiratory system that obtains oxygen when they breathe in and breathe out. The inhaled air reaches the primary bronchus where enters to the lungs for gas exchange and also fills the air sacs.
help is appreciated (: (biology) thank you
Answer:
A
Explanation:
Nuclear division occurs during prophase, which is when chromosomes condense and become visible, spindle fibers emerge from centrosomes, and centrosomes move toward opposite poles. We see this occur in process A