Answers
Answer:
1
Explanation:
1 number label represents the cell membrane, materials moving into and out of the cell are controlled by the cell membrane, hence option A is correct.
What is a cell membrane?A durable barrier between two aqueous compartments is formed by the phospholipid bilayer, which is the membrane's basic structural component.
They have receptors and channels that let particular molecules like ions, nutrients, wastes, and metabolic products that mediate cellular and extracellular activities pass between organelles and between the membrane.
Therefore, biological membranes are semipermeable and serve three main purposes, they prevent toxic substances from entering the cell, hence option A is correct.
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Related Questions
Explain how to revise the following DNA model to form mRNA
AACCTGGGACTATGAT
Answers
Which action is necessary for a solar eclipse to occur?
The Moon needs to be full.
Earth needs to pass in front of the Sun.
The Sun needs to pass in front of the Moon.
The Moon needs to pass between Earth and the Sun.
Answers
Club foot is one of the most common congenital skeletal abnormalities, with a world-wide incidence of about 1 in 1000 births. Both genetic and nongenetic factors are thought to be responsible for club foot. C.A. Gurnett et al. identified a family in which club foot was inherited as an autosomal dominant trait with reduced penetrance. They discovered a mutation in the PITXI gene that caused club foot in this family. Through DNA testing, they determined that 11 people in the family carried the PITXI mutation, but only 8 of these people had club foot. What is the penetrance of the PITXI mutation in this family
Answers
Answer:
0.727
Explanation:
Penetrance can be defined as a measure of the association between a genotype and phenotype. In medical genetics, the penetrance of a mutation leading to the disease state is the proportion of individuals carrying the mutation and showing disease symptoms associated with such mutation. For example, if a mutation leading to the disease state has a 90% of penetrance, it is expected that 9 of each 10 individuals carrying the mutation will develop the disease, while the remaining 10% will not develop the disease. In this case, 8 of each 11 individuals carrying the PITXI mutation show symptoms compatible with the disease, and therefore the penetrance is 8/11 = 0.727 (73%).
Some organisms reproduce sexually. Other organisms reproduce asexually. What are some benefits of asexual reproduction?
1.It It benefits organisms that are immobile
2.immobile.It gives offspring the genetic traits to survive in a particular environment
3. It uses less energy.
4. energy.All of of the above above
Answers
Answer:
3
Explanation:
because you don't have to ...you know
Answer:
It is 4 all of the above.
Explanation:
Yes because I got it right on test.
A decomposer is an organism that gets its energy from ____________.
Group of answer choices
the food it produces during photosynthesis
the prey it hunts and kills
from other living organisms
dead plant and animals
Answers
What is defined as the variable in a controlled experiment that is purposely changed or manipulated? PLEASE HELP!!
constant
independent variable
controlled variable
dependent variable
Answers
Answer:
Independent Variable
Explanation:
I have no idea how to do this please help!
Answers
Answer:
What are you supposed to do?
Explanation:
List and explain the characteristics of living things
Answers
Answer:
Life process
Movement
Respiration
Sensitivity
Growth
Reproduction
reason:
Life process
Explanation
Earthworms
Movement
All living things move in some way. This may be obvious, such as animals that are able to walk, or less obvious, such as plants that have parts that move to track the movement of the sun.
Earthworms use circular and longitudinal muscles to move through soil or along surfaces.
Respiration
Respiration is a chemical reaction that happens within cells to release energy from food.
The food that earthworms eat supplies their body with energy-rich molecules such as glucose. On entering the cells of their body, these molecules are broken down in a series of steps to release energy to be used by the body, producing carbon dioxide and water as waste products.
Sensitivity
The ability to detect changes in the surrounding environment.
Earthworms have light-sensitive cells scattered in their outer skin. Their skin cells are also sensitive to touch and chemicals.
Growth
All living things grow.
Earthworms hatch from eggs and can grow up to a metre or more in length! Some earthworms are also able to regrow small parts of their body that have been lost or injured.
Reproduction
The ability to reproduce and pass genetic information onto their offspring.
Earthworms have both sperm and eggs within their bodies (they are hermaphrodites) but they cannot self-fertilise and need to mate with another individual. After mating, a cocoon containing the fertilised eggs is deposited in the soil.
Excretion
Getting rid of waste.
Earthworms excrete waste from their anus – the last segment of their body.
Nutrition
The intake and use of nutrients. This occurs in very different ways in different kinds of living things.
Earthworm nutrition comes from a variety of sources, depending on their species. Food types include manure, compost, plant material, fungi, microorganisms and decaying animals. They take in food through their mouths.
Genes for body color (B black dominant to b yellow) and wing shape (C straight dominant to c curved) are located on the same chromosome in flies. If single mutants for each of these traits are crossed (i.e. a yellow fly crossed to a curved-wing fly), and their progeny is testcrossed, the following phenotypic ratios are observed among their progeny.
Black, straight 17
yellow, curved 12
black, curved 337
yellow, straight 364
Required:
Calculate the map distance between B and C.
Answers
Answer:
Map distance = Genetic distance, GD = 3.9 MU ≅ 4 MU
Explanation:
The more separated two genes are, the more chances of recombination there will be. The closer they are, the fewer chances of recombination there will be. Two genes that are very close will have a few recombination events and are strongly bounded.
To analyze the recombination frequency, we have to know that:
1% of recombination = 1 map unit = 1centi Morgan = 1,000,000 base pairs. And that the maximum recombination frequency is always 50%.The map unit is the distance between the pair of genes for which every 100 meiotic products one of them results in a recombinant one.
Knowing that the genes are linked, we can calculate genetic distances between them. First, we need to identify the genotypes of the parental gametes with the ones of the recombinants. We can recognize the parental gametes in the descendants because their phenotypes are the most frequent, while the recombinants are the less frequent. So:
Parentals:
black, curved 337yellow, straight 364Recombinants:
Black, straight 17yellow, curved 12To calculate the recombination frequency we will make use of the next formula: P = Recombinant number / Total of individuals.
P = Recombinant number / Total of individuals.
P = 17 + 12 / 337 + 364 + 17 + 12
P = 29 / 730
P = 0.039
The genetic distance (GD) will result from multiplying that recombination frequency (P) by 100 and expressing it in map units (MU).
GD = P x 100
GD = 0.039 x 100
GD = 3.9 MU ≅ 4 MU
What is true of adaptations?
the answer is
They are passed along to offspring
Answers
Answer:
They are passed along to offspring
Explanation:
HOPE IT HELPS YOU
A helium atom that has only two electrons will have its electrons in which orbital(s)?
Answers
1s orbital
Explanation:
The electron has to go into the first energy level, in the 1s orbital. Helium, with two protons, will have two electrons. These are placed one at a time into the 1s orbital. This makes helium a very contented atom.
What’s one indirect consequences of building Seawalls
Answers
Answer:
The shoreline Habitat is destroyed through loss of sand.
Explanation:
A population of rabbits lives in a grassy field that is lush and green in summer and covered in snow in winter. At the start of the summer, 75% of the population are white rabbits, and the remaining 25% of the population are brown rabbits. In rabbits, white (W) is dominant over brown (w). During the summer, the field where they live experiences a drought. The summer drought lasts for two years, through many generations of rabbits.
Which prediction BEST estimates the expected percent of white and brown rabbits in the population at the end of the drought?
Answers
Answer:
The rabbit population will consist of 35% white rabbits and 65% brown rabbits.
Explanation:
hope this helps!
The rabbit population will consist of 35% white rabbits and 65% brown rabbits.
What are the limiting factors of the rabbit population?Until a limiting factor, such as low reproduction, food scarcity, predation, disease, and/or weather conditions restrict populations, the population tends to grow.
Some density-dependent limiting factors are the spread of pathogens, competition for nesting locations, the destruction of habitat, increase in the population of predators. Several predators, including raptors and coyotes, use rabbits as food, but in urban and suburban areas, cats and dogs pose the biggest threat. Some abiotic limiting factors are drought, flood, earthquake, and all types of natural disasters.
Thus, the rabbit population will consist of 35% white rabbits and 65% brown rabbits.
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Given the sequence of DNA nucleotide bases TTAGCCTTG, give the complementary strand of RNA.
Answers
Answer:
AAUCGGAAC
Explanation:
Notice how it says RNA, which means T is replaced with U
Complementary sequences are A and U, and G and C
What hypothesis explains why all birds share similar characteristics?
Answers
Answer:
this is a common ... saw incredible similarities between birds and the theropod dinosaurs (especially ... Like all other reptiles, birds have scales (feathers are produced by tissues similar to ... for theropods are often more serious for the "thecodont" pseudo-hypothesis.
Explanation:
Answer:
The modern version of the "from the ground up" hypothesis argues that birds' ancestors were small, feathered, ground-running predatory dinosaurs that used their forelimbs for balance while pursuing prey
Explanation:
Need Help ASAP plz will give Brianliest. Digestive juices contain enzymes, water and some
other substances. Name two of these other substances.
State which digestive juice contains them, and state
what function they perform.
Answers
Answer:
Hydrochloric acid Prepares protein for digestion (denaturation) Activates enzymes and “Disinfection”
Pepsin (an enzyme) Begins protein digestion
Gastric lipase Some lipid digestion
Gastrin (hormone) Stimulates gastric secretion and movement
Intrinsic factor (a glycoprotein) Needed for absorption of vitamin B12
Explanation:
which of the following is the most complex
according to their cellular level of organization? A.
Hair B. Euglena C. Hydra D.Heart. bplease give explanations.
Answers
d.corazon.ya que sin el no habria vida
________ cells lack a membrane-enclosed nucleus.
Answers
Answer:
Prykaryotic
Explanation:
Prykaryotic cells lack a membrane-enclosed nucleus.
water is a renewable resource that is constantly generated through the water cycle . in what areas might the water cycle be most limited ?
A) Canada .
B) south Africa .
C) south America .
D) Northern Africa .
Answers
Please answer!!
Read the paragraph from the section "Types Of
Isolation."There are biological properties of organisms
that prevent breeding across different species. They are
known as reproductive isolating mechanisms (RIMs). A
mechanism is a process or method. Which option is the
BEST definition of "properties" as it is used in the
paragraph above?
Answers
The correct answer is B. Traits or features that take effect.
Explanation
Property is a word to designate any quality that identifies identifying something or someone, distinguishing it from its peers. It can refer to different issues such as its characteristics, capabilities, possibilities, physical appearance, among others. According to the text, "There are biological properties of organisms that prevent breeding across different species". So the answer is B. Traits or features that take effect.
what is the name of these compound based on IUPAC nomenclature?
Answers
Explanation:
plz mark my answer as brainlist you find it useful.
hope this will be helpful to you.
Answer:
Required answer in the attachmentIn the first step of pollination, _____ from the male anther is transferred to the female _____. The pollen grain is then carried down the _____ to the ovary. Inside it meets with an ______. This is the process of fertilization.
WILL GIVE BRAINLIEST IF YOU HELP, IT'S DUE TMRWWW
Answers
Answer:
1. pollen grains
2. stigma
3. style
4. egg cell of an ovule
In peas, round shape is dominant (R) over wrinkled (r) and yellow color is dominant (Y) over green (y). If both parent plants are heterozygous for both traits,
what is the probability of an offspring's phenotype being round and yellow?
HELP I NEED A NUMBER OUT OF 16
Answers
Answer:
9/16
Explanation:
RrYy x 2
Answer:
9 out of 16 (also 9/16)
Explanation:
Count the likeliness of the offspring to be round:
RR, Rr, rR, rr
round shape is 3 out of 4 times
Count the likeliness of the offspring to be yellow:
YY, Yy, yY, yy
yellow color is 3 out of 4 times
Multiply the likeliness of being round and being yellow (since they are two independent probabilities, we are using multiplication rule):
3/4 * 3/4 = 9/16
Make me the brainliest ;)
How do mosses and ferns reproduce?
with spores
with seeds
with eggs
with sperm
I think the answer is -> SPORES <-
Answers
What are CD4 cells?
a. T-cells that have a CD4 receptor
b. B-cells that have a glycoprotein receptor
c. HIV antigens
d. red blood cells
Answers
Answer:
I'm pretty sure it is b because CD4 cells are the cells that are a glycoprotein
Explanation:
Despite the rampant depletion of trees in the natural forest in Ghana,it is still worth using wood as the main construction.Disscuss
Answers
Answer:
Hope this helps!
Explanation:
Forest resources support livelihood of people in jurisdictions in which forest is located. However, the forest size is gradually depleting continuously. The lack of information about the specific agents and forces of forest depletion is worrying. This is due to the inter-generational and intra-generational equity notions that affect mankind. As such, there is the need to maintain such resources on a non-declining value basis so as to maintain human welfare over time. Thus, the objective of this study is to empirically examine the determinants of forest depletion in Ghana over the 1970-2012 period in Ghana. This study employs multiple regression concepts to examine the effects of the determinants on forest depletion. The findings of the study indicate that gold extraction for export, population growth and logging increase the rate of forest depletion for the study period. More significantly, population growth reflected in settlement expansion, agriculture purposes, increased use of fuel wood, etc have greater effect on forest loss in Ghana. This suggests that, protection of the forest is necessary and sufficient condition for economic growth. As a result of these, both government and policy-makers need to safeguard the forest estate, by increasing afforestation schemes and also using part of the returns from gold exports to regenerate the forest.
Answer:
The main cause of deforestation is agriculture (poorly planned infrastructure is ... In 2019, the tropics lost close to 30 soccer fields' worth of trees every single minute. ... of Texas could be lost to rampant deforestation, according to a WWF report. ... These fires not only alter the structure and composition of forests,
Explanation:
Why is it important for others to believe in science
Answers
Answer:
because science is one of the most important channels of knowledge
Explanation:
because of science you can create a new knowledge, improving education, and increasing the quality of our lives.
I hope it can help.
In 4-5 sentences, explain why it is important for our cells to undergo the cell cycle.
Answers
Answer:
If our cells don't undergo the cell cycle, our body will run out of cells and we'll maybe suffer from diseases and the cells in our body isn't able to fight the disease and we might die. Our body is made up of good cells which protects our health.
What is an example of elastic potential energy?
a. stretching a rubber band
b. apple falling from a tree
c. A dog lying on the floor
d. throwing a ball
Answers
Answer:
a.stretching a rubber band
Answer:
An example of elastic potential energy is
A. stretching a rubber band.
Hope it will help :)
answer the correct answers to this assignment.