Answer:
changes in the shape of Earth's orbit
Answer:
c
Explanation:
In wild populations, evolution is often caused by natural selection. Based on what you have observed, how does natural selection occur?
Answer:
Organisms with heritable (genetically determined) features that help them survive and reproduce in a particular environment tend to leave more offspring than their peers. If this continues over generations, the heritable features that aid survival and reproduction will become more and more common in the population.
Analyze the relationships between the anatomical structures and physiological functions of the muscular system by matching the terms in column A with the definitions in column B. Place the letter of your choice in the space provided. Column A
a. Endomysium
b. Epimysium
c. Fascia
d. Fascicle
e. Myosin
f. Perimysium
g. Sarcolemma
h. Sarcomere
i. Sarcoplasm
j. Sarcoplasmic reticulum
k. Tendon
l. Transverse (T) tubule reticulum
Column B
1. Membranous channel extending inward from muscle fiber membrane
2. Cytoplasm of a muscle fiber
3. Connective tissue located between adjacent muscles
4. Layer of connective tissue that separates a muscle into small bundles
5. Plasma membrane of a muscle fiber
6. Layer of connective tissue that surrounds a skeletal muscle
7. Unit of alternating light and dark striations between discs (lines)
8. Layer of connective tissue that surrounds an individual muscle fiber
9. Cellular organelle in muscle fiber corresponding to the endoplasmic
10. Cordlike part that attaches a muscle to a bone
11. Protein found within thick filament
12. A small bundle of muscle fibers within a muscle
Answer:
a. Endomysium 8. The layer of connective tissue that surrounds an individual muscle fiber
b. Epimysium 6. The layer of connective tissue that surrounds a skeletal muscle
c. Fascia 3. Connective tissue located between adjacent muscles
d. Fascicle 12. A small bundle of muscle fibers within a muscle
e. Myosin 11. Protein found within a thick filament
f. Perimysium 4. The layer of connective tissue that separates a muscle into small bundles
g. Sarcolemma 5. The plasma membrane of a muscle fiber
h. Sarcomere 7. Unit of alternating light and dark striations between discs (lines)
i. Sarcoplasm 2. The cytoplasm of a muscle fiber
j. Sarcoplasmic reticulum 9. A cellular organelle in muscle fiber corresponding to the endoplasmic
k. Tendon 10. The cordlike part that attaches a muscle to a bone
l. Transverse (T) tubule reticulum 1. Membranous channel extending inward from muscle fiber membrane
Explanation:
A muscle has around it epimysium, which is connective tissue. Inside the epimysium, there are fascicles, and around each of them, there is perimysium. Inside every fascicle, there are muscle fibers, each of them is surrounded by a connective tissue called endomysium. Between every muscle, there is also connective tissue and is called fascia. The connective tissue has vessels and provides support.
The muscle cells are called fibers. They have a membrane, the sarcolemma, a cytoplasm, the sarcoplasm, and a sarcomere, which is the functional unit of the fiber, in other words, it is the structure responsible for the contraction. The sarcomere has different bands made of thick filaments of myosin and thin filaments of actin. They are the light and dark striations that go from disc z to disc z when we observe the sarcomere under a special microscope. The sarcoplasmic reticulum is the place that stores the calcium necessary for the contraction of the fiber, and the transverse tubule reticulum allows the contraction of various fibers since they spread the action potential amongst fibers.
Every year, the tropical rain forest has a rainy season. The forest floor floods, covering once dry areas with water. Some
organisms are unable to tolerate the increased water, so they have to move to other locations to survive.
Which word can best be used to describe this scenario?
(1 point)
O biodiversity
O predation
o disturbance
O damming
Answer:
it is a disturbance because it drasticly changes the enviroment temeraraly disturbing the animals and forcing them to move
The given scenario can be best illustrated by the term disturbance.
What is disturbance?Disturbance in ecology refers to a temporary modification in environmental conditions, which makes a pronounced modification within an ecosystem. Disturbances generally act briskly and with great influence, and changes the physical arrangement or composition of abiotic and biotic elements.
The prime ecological disturbances may comprise:
Fires FloodingTramplingInsect outbreaksEarthquakesClimate changeHuman impactTherefore, in the given scenario, with the increase in the level of water, some of the organisms move to other locations shows that the phenomenon of disturbance has taken place within the ecosystem due to flooding of water.
Thus, the correct answer is disturbance.
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You isolate an organism from a water sample and test it with a catalase test and grow it in thioglycollate medium. The results showed bubbling after the addition of hydrogen peroxide and a band of growth at the top of the thioglycollate tube. What is the most likely oxygen classification of your organism
Answer: The most likely oxygen classification is OBLIGATE AEROBIC ORGANISM.
Explanation: Most medically important bacteria can be grown artificially in the laboratory provided the atmospheric conditions and temperature are correct and the culture medium used contains the required nutrients.
The thioglycollate medium is used to differentiate oxygen requirements in an isolated organisms. While catalase test is used to differentiate catalase producing from non-catalase producing organisms.
Differences in the effect of oxygen on bacterial growth provide a further way of classifying bacteria:
● OBLIGATE AEROBES, which require free oxygen to grow,
● obligate anaerobes, which are unable to grow in free oxygen,
● facultative anaerobes, which can grow in conditions in which oxygen is present or absent,
● microaerophiles which grow best in conditions of reduced oxygen concentration.
The most likely oxygen classification is OBLIGATE AEROBIC ORGANISM because from the result of the test carried out on the isolated organisms,
--> The organism is catalase positive as it was able to breakdown hydrogen peroxide to oxygen and water( bubbling after the addition of hydrogen peroxide confirmed it as positive). Catalase is an enzyme produced by all aerobic organisms.
--> while in the thioglycollate medium the organism grew at the top of the test tube in order to absorb maximal amount of oxygen.
Sickle cell anemia is a genetic condition that occurs because of a single point mutation in the DNA gene for hemoglobin. How is this mutation expressed in humans?
A.) The protein coded by the DNA has a different amino acid sequence
B.) The chromosome caring this gene changes shape during cell reproduction
C.) The hormones in the bladder change by increase differences in genes
D.) The carbohydrate code by the DNA has a different structure
Answer:
B.) The chromosome carrying this gene changes shape during cell reproduction
Explanation:
According to this question, Sickle cell anemia is a genetic condition that occurs when the HBB gene that codes for haemoglobin protein undergoes a point mutation. Mutation alters the genetic sequence of a gene.
This mutation expresses itself when the chromosome 11 carrying the mutated gene changes shape during cell reproduction. Normal Red Blood Cell has a disc-shaped structure, however, this mutation causes a change in shape of the chromosome involved.
What is the relationship between the places where malaria is common and where the sickle cell allele is commonly found?
Answer:
At a global scale, the sickle cell gene is most commonly found in areas with historically high levels of malaria, adding geographical support to the hypothesis that the gene, while potentially deadly, avoids disappearing through natural selection by providing protection against malaria.Nov 2, 2010
Explanation:
I hope this helps :)
How does the mixture of dominant and recessive traits produce certain traits?
Answer:
DD Dd dd
Explanation:
so the answers above are the simplest traits a dominant + recessive trait can produce
A recorder has seven holes. If you want to produce the
deepest pitch possible, you would:
a. Cover the largest holes
b. Cover the topmost and bottom-most holes
c. Cover none of the holes
d. Cover all of the holes
put the answer not file
Answer: d. Cover all of the holes
Explanation: hope im right✌
Your friend runs out of gas and you have to help push his car. Discuss the sequence of bones and joints that convey the forces passing from your hand, through your upper limb and your pectoral girdle, and to your axial skeleton.?
Answer: The sequence of bones and joints that convey the forces include: From metacarpal bones --> carpal bones --> midcarpal and radiocarpal joints --> radius and ulna bones --> elbow joint --> humerus --> glenohumeral joint --> scapula --> acromioclavicular joint --> clavicle --> sternoclavicular joint --> sternum.
Note: the sign (-->) represents "into the".
Explanation:
The skeletal system is made up of bones of the skeleton, their joints and the skeletal muscles which acts together to bring about different movements in the body. The skeleton of a vertebrate had the following basic plan:
--> The axial skeleton: this forms the main central axis. This is made up of the skull,vertebral column, breastbone (sternum), and ribs.
--> The appendicular skeleton: this consists of parts that articulates with the axial skeleton. This is made up of the forelimbs, hindlimbs, pelvic and pectoral girdles.
From the question given, in an attempt to help push the friend's car, the sequence of bones and joints that convey the forces will pass from METACARPAL BONES of your hand into the CARPAL BONES at the base of your hand. Forces will then pass through the MIDCARPAL and RADIOCARPAL JOINTS into the RADIUS and ULNA bones of the forearm. These will pass the force through the ELBOW JOINT into the HUMERUS of the arm, and then through the GLENOHUMERAL JOINT into the SCAPULA. The force will travel through the ACROMIOCLAVICULAR JOINT into the CLAVICLE, and then through the STERNOCLAVICULAR joint into the STERNUM, which is part of the axial skeleton.
As one pushes against the car, the forces will pass in a sequential manner from the bones of the hand to the bones that are part of the axial skeleton.
• Forces will pass from the metacarpal bones of the hand into the carpal bones at the base of the hand, when one pushes against the car.
• After that the forces will then mediate via the radiocarpal and midcarpal joints into the ulna and the radius bones of the forearm.
• Then the force will move via the arm's humerus, and then via the glenohumeral joint into the scapula.
• The force then will mediate via the acromioclavicular joint into the clavicle, and then via the sternoclavicular joint into the sternum, that is, the part of the axial skeleton.
Thus, in the given case, force gets mediated through the bones of the hand and towards the bones of the axial skeleton in a sequential manner.
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A tissue is composed of a group of
Answer:
Tissue is a group of cells that have similar structure and that function together as a unit. primary types of body tissues include epithelial, connective, muscular and nervous tissues. Epithelial tissues form the covering of all body surfaces , ine body, cavities and hollow organs, and are the major tissues in glands.
A tissue is composed of a group of cells that are determined to play a specific function. The Cytoplasm is a dense gel-like material that is filled within the cell.
What is Cell theory?Cell theory was proposed by M. Schleiden and T. Schwann in 1838. According to them, there are three postulates of cell theory that are as follows:
All living organisms whether plants or animals are made up of cells.A cell is the smallest unit of all living organisms.The cell is the structural and functional unit of life.Cell theory was further refined by German biologist Rudolf Virchow in 1855. According to him, all cells are arising from pre-existing cells. The Cell wall generally protects the cell and it is most commonly found in plants, animals, bacteria, etc.
Inside the cell, there are various organelles present that perform specific functions for the survival of the cells. The nucleus is known as the brain or controlling center of the cell, which transmits genetic information from one generation to the next.
Therefore, each of the above-given term is justified above.
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10. What happens when environments change and species cannot adapt?
Oceans have a high Biodiversity.
true
false
(つ ^_^ )つ Hey There!
Answer : True!
Find the speed of a caterpillar that crawls a distance of 6.0 cm every
2.0 seconds. The equation for speed is v=d/t.
Answer:
3 cm per second
Explanation:
6/2=3 cm per second
5. Which sentence would the author disagree wit
Answer of the question
Different __________ working together to perform a particular job are called __________. Fill in the blank.
Answer:
Different tissue working together to perform a particular job are called organs
Explanation:
HELP PLSSS !!
Based on this data, what can be concluded about the impact
seasonal changes have on these organisms around the Barents Sea?
A. The availability of solar energy limits photosynthetic productivity in winter months
B. Seasonal Changes have no impact on these organisms
C. During winter months the Diatom and zooplankton population completely die off due
to the lack of sunlight.
D. Due to the availability of solar energy, Diatom mass peaks in July.
Answer:
D. Due to the availability of solar energy, Diatom mass peaks in July.
Explanation:
Diatom are the photosynthetic algae which prepare food for themselves from the solar radiation just like plants. These diatoms produce more biomass or vegetation in the summer season mainly in July because availability of more sunlight in the Barents sea region while on the other hand, less biomass in the winter season due to low temperature and solar radiation which also effects the population of zooplankton organisms. So we can conclude that seasonal changes have a great impact on the organisms living around the Barents Sea.
Answer:
The availability of solar energy limits photosynthetic productivity in winter months
Explanation:
Trust me
Amino acids are joined by dehydration synthesis and link by a blank bond.
Answer:
What is the question?? :}
Explanation:
How are eukaryotic cell walls different from bacterial cell walls?
State the importance of wind in ecosystems.
Answer:
This is distinct from anemia caused by deficiency of folic acid or vitamin B12, which cause anemia. Niacin (Vitamine B3) deficiency causes pellagra, a reversible nutritional wasting disease characterized by four classic symptoms often referred to as the four Ds: diarrhea, dermatitis, dementia, and death.
Explanation:
mark as brainliest plsDescribe two ways that humans influence the cycling of matter in ecosystems.
Explanation:
Two important ways by which humans have affected the carbon cycle, especially in recent history, are: 1) the release of carbon dioxide into the atmosphere during the burning of fossil fuels, and 2) the clearing of trees and other plants (deforestation) that absorb carbon dioxide from the atmosphere
If the acidity of the body rises, excess [BLANK] ion are secreted into the collecting ducts
Answer:
our body are important to take care
How is gamete formation different in females than in males?
a) Males produce four functional sperm while females produce only one functional egg.
b) Males produce only one functional sperm while females produce four functional eggs.
c) Males produce four genetically identical sperm while females produce four genetically different eggs.
d) Males produce four genetically different sperm while females produce four genetically identical eggs.
What are three ways in which Mountains can be impacted by either natural processes or human processes, including both constructive and destructive processes? Please write if it is constructive or destructive next to it.
I need answers quickly, please!
I will rate brainliest
Answer:
deposition-dropping of sediments (Destructive)
mountain building-tectonic plate (Constructive)
movement
volcanic activity (Desctrutive)
There are ongoing arguments among taxonomists as to which phyla represent the closest relatives of phylum Annelida. Some propose that these worms share a common ancestor with the arthropods (crabs, insects etc.). However, the majority continue to keep the annelids lumped together with the Lophotrochozoa. The reasons for this are many but probably the least disputed comes from:______.
a. the segmented body plan of the annelids.
b. molecular analysis.
c. metamerism.
d. schizocoelous origin of the coelom.
Answer:
a. the segmented body plan of the annelids
Explanation:
lophotrochozoan is a taxonomy of animals that includes annelids, bryozoans, and brachiopods. This taxonomy of creatures was defined in 1995 as the last ancestor of the taxa of worms, mollusks, and annelids. Their classical definition depends on the topology of the spiral tree of life. Annelids have a segmented body part wherein the external morphological features are repeated in every body segment. It allows the animal to become bigger and makes their movement more fat and efficient.Answer:
B: Molecular Analysis
Explanation:
I clicked on the other mans answer and was quite dissapointed to see that it was incorrect, so im writting this to tell you its B.
give the correct biological term for the following programme where members of the community help patients take their medicines regularly
Answer:
Explanation:
Supervised treatment
In which of the following does the land being moved contain approximately 60% water?
O landslide
slump
O mudflow
creep
Answer:
Landslide
Explanation:
The blue people of Troublesome Creek Kentucky were genetically isolated from the rest of the world for generations. A rare recessive allele that causes people to have a blue tone to their skin, methemoglobinemia, became disproportionately common within this population by way of their genetic isolation. In the last few decades new roads opened leading to the end of this communities isolation. To the surprise of many, the methemoglobinemia phenotype disappeared along with their genetic isolation. Which of the following may best explain the apparent disappearance of this once common trait?
a. Methemoglobinemia did not confer any physical advantage so that the trait was selected against.
b. Methemoglobinemia was probably lethal and all those that carried this trait died and did not have a chance to pass on this trait to future generations.
c. Those that had the traits simply did not have descendents.
d. With the end of genetic isolation gene flow took place.
Answer:
The correct answer would be - d. With the end of genetic isolation gene flow took place
Explanation:
It is given that people of Troublesome Creek Kentucky were isolated and have a rare recessive allele that results in a blue tone to their skin. However, later these isolated people connected with the people from outside, and due which allow them to intermate. Intermating among populations from isolated and people from outside leads to gene flow.
Methemoglobinemia was present in the isolated population as they had both recessive alleles in their genotype and other hand people from outside might have heterozygous or both dominant allele genotypes that make them free from this disorder.
Due to the intermating and gene flow, the number of heterozygous conditions rises and after many generations slowly methemoglobinemia could have disappeared due to the masked recessive allele.
a group of similar cells combine to form ?
Answer:
tissues
Explanation:
What is the function of the circulatory system. I forgot!
Answer:
to pump blood throughout the body
Answer:
to pump blood throughout the body
Explanation:
The circulatory system contains of arteries and veins that help blood travel throughout the body