When different genes that make for greater or lesser chances of survival become more frequent in a population, the phenomenon is called evolution by natural selection.
What is evolution by natural selection?First, evolution is defined as gradual changes to the traits of organisms with time.
Natural selection refers to the tendency of nature to select for or against traits that confer adaptive advantages or disadvantages in organisms respectively.
In a population of the same organisms, the gene that confers greater chances of survival is selected among numerous similar genes. This gene becomes more frequent in the gene pool of the population with time.
Thus, we say that such a population has evolved through natural selection.
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In pneumothorax, the lung collapses because ______.
Answer:
here's your answer hope it helps you
Explanation:
a pneumothorax occurs when air leaks into the space between your lung and chest wall. this air pushes on the outside of your lung and make it collapse.
It should be noted that In pneumothorax, the lung collapses because air leaks into the space between lung and chest wall.
What is pneumothorax?pneumothorax can be regarded as one that occur when air leaks into the space between your lung and chest wall.
Then this air is been pushed on the outside of the lung then it will it collapses.
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Choose the substances that can pass through the blood-brain barrier. Multiple select question. all hormones some anesthetics alcohol all metabolic waste all chemotherapy drugs nicotine
Based on the function of the blood-brain barrier, the substances that can pass through the blood-brain barrier are some anesthetics and all hormones.
What is the blood-brain barrier?The blood-brain barrier is a network of blood vessels and tissues which selectively allow the movement of certain substances in blood into the brain bit not others which are harmful to the brain.
Some of the substances that can pass through the blood-brain barrier include:
water,oxygen,carbon dioxide, andsome anestheticshormonesTherefore, from the given options, the substances that can pass through the blood-brain barrier are some anesthetics and all hormones.
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How do gametes differ from other cells in the body?.
Answer:
How they are different is Somatic cells are any form of a biological cell, other than a reproductive cell.
fresh water that flows or is stored in bodies of water on Earths surface
stored
picture resembles storage cubes
humans have 23 pairs of chromosomes in their somatic cells. how many pairs of chromosomes will be in each daughter cell after mitosis
Answer:
each daughter cell will have half of the original 46 chromosomes, or 23 chromosomes
Explanation:
each chromosome consists of 2 sister chromatids of 23
Ram's father have 3 childrens first one is tina and second one is mina who is third one
D/B magnetic substance and magnet
Explanation:
Substances that are attracted by a magnet are called magnetic substances. Example: Iron, cobalt, nickel, etc.
What is the density of a mineral used for?
Answer:
Density is an intrinsic physical property of minerals that relates to the composition of the mineral and to the pattern in which the mineral’s atoms are arranged.
What is the main function of the cytoplasm in a plant cell?.
Answer:
the cytoplasm functions to support and suspend organelles and cellular molecules. they also have a role in maintaining the shape and consistency of a plant cell
The remote sensing technique known as _________ has enabled scientists to map more than 800 square miles (2,100 square kilometers) of the Maya Biosphere Reserve in Guatemala, thus providing the largest dataset ever obtained for archaeological research.
From what we know, we can confirm that the remote sensing technique described in the question is that of laser scanning.
What is laser scanning?This is, as described in the question, a remote sensing technique. This is a method most often used for land surveys, in which lasers are pointed at the area, which gather information in the form of 3D coordinates, which are later compiled to create detailed maps of the region.
Therefore, we can confirm that the remote sensing technique used by the PACUNAM project in order to map more than 800 square miles of the Maya Biosphere Reserve in Guatemala, is that of laser scanning.
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Regarding the membrane potential of a cell at rest, the internal environment of the cell is more __________ compared to the external environment.
Answer:
fluid?
Explanation:
4 question brainly Est
The answer is
C. oxygen and sugar
Who first recognized the cell as the universal unit of life?
Virchow
van Leeuwenhoek
Hooke
Schleiden and Schwan
Answer: Robert Hooke
Explanation:
He had observed the cells in thin sliced corks using a microscope.
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What do channel proteins, aquaporins, and carrier proteins have in common?.
Which of the following is the correct definition of biotechnology?
Answer: Biotechnology is the area of biology that uses living processes, organisms or systems to manufacture products or technology intended to improve the quality of human life.
Explanation:
Your welcome
Answer:
The cornea and the lens help to focus the light rays onto the back of the eye { RETINA}. The cells in the retina absorb and convert the light to electrochemical impulses which are transferred along the optic nerve and than to the brain.
If someone's blood was hypertonic to their body tissues, would they be considered dehydrated? Why or why not?
Answer:
when there is too much salt or water in your body is when it would be considered dehydrated
Explanation:
losing too much water while keeping too much salt in the fluid outside your cells cause hypertonci dehydration
As blood volume decreases, blood pressure ____________ . If greater than ____________ of the blood volume is lost from the blood vessels, the ____________ division of the autonomic nervous system (ANS) is activated, bringing about ____________ vasoconstriction of blood vessels, increased heart rate, and force of heart contraction in an attempt to maintain blood ____________ . These processes are effective in maintaining blood pressure until approximately _______
Explanation:
Decreases, 40%, Sympathetic, Increased, Pressure, 10%.
The pattern observed when a heterozygote does not show the trait associated with the dominant allele is
Co-dominance will make the pattern expected for the dominant allele to control the observed trait not to occur.
What is allele?Genes occur in pairs. These pairs of genes determine which traits are expressed in an organism. The allele has a dominant gene and a recessive gene.
Sometimes, the pattern that is expected in which the dominant gene is expressed is not observed due to codominance.
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Describe the process that causes the cloud type
shown to reach heights of over 6000 m.
Answer:
Explanation:
Clouds are formed when air contains as much water vapor (gas) as it can hold. This is called the saturation point, and it can be reached in two ways. First, moisture accumulates until it reaches the maximum amount the volume of air can hold. The other method reduces the temperature of the moisture filled air, which in turn lowers the amount of moisture it can contain. Saturation, therefore, is reached through evaporation and condensation, respectively. When saturation occurs, moisture becomes visible water droplets in the form of fog and clouds.
In man, hitchhiker's thumb is domiant to a straight thumb, and brown eyes is dominat to blue eyes. If a man that has a straight thumb and brown eyes in the heterozygous form marries a woman that is heterozygous for hitchhiker's thumb and blue eyes, what is the chance that one of their children will have a straight thumb and blue eyes?
Answer:
25%
Explanation:
T = Hitchhiker's thumb
t = straight thumb
B = Brown eyes
b = blue eyes
The man's genotype is ttBb
The woman's genotype is Ttbb
Make a dihybrid punnett square to find the possible genotypes of the offspring
ttbb is straight thumb and blue eyes. There are 4 out of 16 genotypes with this phenotype so:
Divide 4 with 16 and multiply by 100 to get the percentage of offspring with that phenotype
4 ÷ 16 = 0.25
0.25 × 100 = 25%
Which statement is one component of the cell theory
Answer is that the cells exist inside the body
Explanation:
i went to science class 1 time in freshmen year
Answer:
All living cells arise from pre-existing cells is one component of the cell theory. The Cell Theory states: 1. All living organisms are composed of cells. They may be unicellular or multicellular. 2. The cell is the basic unit of life.
Do you think you would best like to treat horses, cattle , or pigs ? Why do you think you’d like to work with that particular large mammal?
A continuation of this will have what immediate impact on the local ecosystem?
Answer:
Understanding the status and trends of ecosystem services (ES) in a changing environment is important for identifying effective management measures of multifunctional mangrove ecosystems. Mangroves and their ES are jeopardized by a complex set of factors, with impacts that are experienced at local levels, especially in developing countries, where people often rely directly on natural capital for their livelihoods and well-being. This study was set to explore how local communities in the Rufiji Delta, situated in central coastal Tanzania, perceived the status and trends in mangrove ecosystem services (MES), associated drivers of change and the impacts of changes in MES on local livelihoods. A mixed methodological framework (including focus group discussions, key informant interviews, household surveys and direct observations) was used. People from villages close to mangroves rated the status of MES higher than those in villages distant from mangroves. Provisioning services (P) were often perceived to be in a worse and more declining state than regulating (R), cultural (C) and supporting services (S). A decrease in availability of poles and firewood (P), decline of fish habitats (S) and an increase in education value (C) were the most commonly perceived changes of MES in the study area. Illegal harvesting of mangrove poles, rice cultivation, climate change and inadequate management were seen as the most critical drivers of mangrove degradation, although the perceptions differed between sites. Rice farming was perceived to be a primary cause of mangrove loss by communities far from mangrove forests, while illegal exploitation was identified as the major driver by communities near mangroves. Fishing, collection of poles and honey were perceived as the most impacted livelihoods depending on MES. This together with the comparatively low status and declining trend of these MES indicate that they should be of high management priority as indicated by the first order management index used in this study.
Explanation:
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What is evolution?
a. An increase in complexity over time
b. The tendency of species to improve over time
c. Any change to the genetic composition of a population
а
d. All of the above
Answer:
Any change to the genetic composition of a population
Explanation:
the answer above got me wrong, this is the right one.
Imagine that you are a scientist who has discovered a new object. You want to find out if the object is biotic or abiotic. You observe several characteristics about the new object. Which of these characteristics would tell you that the object is abiotic, or not alive?
questions updated The object has a crystalline structure.
The object has a crystalline structure.
The object responds to stimuli.
The object responds to stimuli.
The object can mutate.
The object can mutate.
The object cannot create energy
The characteristics that would tell one that the object is abiotic, or not alive is that object responds to stimuli.
WHAT IS A LIVING THING?A living thing is any organism that possess life as depicted by the exhibition of certain characteristics.
The characteristics of living organisms are as follows:
Ability to reproduce i.e. make copies of itselfAbility to respire Ability to respond to stimuli i.e. irritabilityAbility to increase in size i.e. growthAbility to excrete waste products.According to this question, a scientist who has discovered a new object wants to find out if the object is biotic (living) or abiotic (non-living).
Therefore, the characteristics that would tell one that the object is abiotic, or not alive is that object responds to stimuli.
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Carbohydrates are polymers formed of structural units called __________. Select one or more: a. nucleotides b. monosaccharides c. amino acids d. fatty acids
Carbohydrates are polymers formed of structural units called monosaccharides.
What are Carbohydrates?These are chemical compounds which comprises of the elements Carbon.Hydrogen and oxygen and provide the required energy to the body cells.
It is known as a polysaccharide and is formed from the combination of structural units which are referred to as monosaccharides.
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Question 1
Which of the following molecules does NOT enter the cell via facilitated diffusion?
Fats
Nucleotides
Amino acids
Sugars
Monosaccharides
The molecule that does not enter the cell via facilitated diffusion is :
( A ) Fats
Facilitated diffusionFacilitated diffusion is a type of spontaneous transport system ( passive ) in which charged and polar molecules such as carbohydrates, Amino acids, Nucleotides and ions move across a biological membrane. with the aid of a specific transmembrane integral proteins while
Fats ( fatty acid ) enters the enterocyte through simple diffusion process via the plasma membrane.
Hence we can conclude that The molecule that does not enter the cell via facilitated diffusion is Fats.
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gaseous exchange in an insect
Answer:
The Spiracles is/are used for gaseous exchange in insects.
Explanation:
The Spiracles is a respiratory structure or an opening found on the exoskeleton of insects. It acts as a medium of gaseous exchange not only for Insects (Insecta) but also for some Arachnid (spiders and others).
What process controls water loss by the plant, so that the plant will not wither up and die? Question 3 options: Respiration Transpiration Restoration Photosynthesis.
Answer:the awnser is trasperation
Explanation:
would it be hard to stop a moving shopping cart that is full and moving fast? Explain your answer