Which blood vessel contains valves?
A renal artery
B renal vein
Carteriole
D capillary
Answer:
B
Explanation:
veins contain valves that ensure blood flows in only one direction.
What was the amazing find by Phillip Gingrich and his team?
Answer:
in 1978, he discovered a 52-million-year-old skull in Pakistan that resembled fossils of creodonts
When he seen that his team uncovered some pelvic bones in 1977
ng living
Thought Provoker
The house sparrow (or English sparrow) is one
of the most common birds in the world, living
on every continent except Antarctica. This bird's
scientific name is Passer domesticus; what is the
house sparrow's genus name?
maeus
ig ok i m not sure its genus name is Passer as per how much ik
I m really sorry if its wrong
16. Which statement is not true of an ecosystem F. Organism develop adaptations to survive
G. Simbiosis is the same as competition
H. Populations often compete for the same food .
I. Populations the together to form a community
Answer:
G
Explanation:
The diagram below illustrates two different protein molecules found in organisms. Which of the following statements is not correct?
The proteins have different functions
The proteins are both composed of amino acids
The sequence of amino acids in both proteins are the same
The shapes of these proteins determine their functions.
Answer:
Proteins are one of the most abundant organic molecules in living systems and have the most diverse range of functions of all macromolecules. Proteins may be structural, regulatory, contractile, or protective; they may serve in transport, storage, or membranes; or they may be toxins or enzymes. Each cell in a living system may contain thousands of different proteins, each with a unique function. Their structures, like their functions, vary greatly. They are all, however, polymers of alpha amino acids, arranged in a linear sequence and connected together by covalent bonds.
Alpha Amino Acid Structure
The major building block of proteins are called alpha (α) amino acids. As their name implies they contain a carboxylic acid functional group and an amine functional group. The alpha designation is used to indicate that these two functional groups are separated from one another by one carbon group. In addition to the amine and the carboxylic acid, the alpha carbon is also attached to a hydrogen and one additional group that can vary in size and length. In the diagram below, this group is designated as an R-group. Within living organisms there are 20 amino acids used as protein building blocks. They differ from one another only at the R-group position. The basic structure of an amino acid is shown below:
Figure 2.1 General Structure of an Alpha Amino Acid
There are a total of 20 alpha amino acids that are commonly incorporated into protein structures (Figure 2.x). The different R-groups have different characteristics based on the nature of atoms incorporated into the functional groups. There are R-groups that predominantly contain carbon and hydrogen and are very nonpolar or hydrophobic. Others contain polar uncharged functional groups such as alcohols, amides, and thiols. A few amino acids are basic (containing amine functional groups) or acidic (containing carboxylic acid functional groups). These amino acids are capable of forming full charges and can have ionic interactions. Each amino acid can be abbreviated using a three letter and a one letter code.
Explanation
In the Fruit Fly Drosophila melanogaster, wings (A) are dominant over a lack of wings (a) and red eyes (E) are dominant over sepia (brownish) eyes (e). A wingless fly that is heterozygous for eye color is crossed with a fly that is heterozygous for both eye color and presence of wings. What are the genotype and phenotypic ratios for this cross? What fraction of the offspring from this cross will be wingless and have sepia eyes? What fraction will have the genotype AaEe?
Please help with the questions!!!!!
Answer:
7.b
8.i dont know
9.i dont know
Explanation:
sorry only know one
What is a shadow? Explain by giving an example.
Answer:
Shadows are made by blocking light. Light rays travel from a source in straight lines. If an opaque (solid) object gets in the way, it stops light rays from traveling through it. This results in an area of darkness appearing behind the object. The dark area is called a shadow
Answer:
Shadows are made by blocking light. Light rays travel from a source in straight lines. If an opaque (solid) object gets in the way, it stops light rays from traveling through it. This results in an area of darkness appearing behind the object. The dark area is called a shadow
An example of shadow is a faithful dog that follows behind you all day.
aerobic respiration occurs in the presence of?
Answer:
Oxygen.
Explanation:
Aerobic respiration occurs in the presence of oxygen.
Give me an example of a producer, primary consumer, secondary consumer, and decomposer within the same ecosystem.
HELP
Answer:
Producers
Producers are any kind of green plant. Green plants make their food by taking sunlight and using the energy to make sugar. The plant uses this sugar, also called glucose to make many things, such as wood, leaves, roots, and bark. Trees, such as they mighty Oak, and the grand American Beech, are examples of producers.
Primary Consumer
Within an ecological food chain, Consumers are categorized into primary consumers, secondary consumers, tertiary consumers. Primary consumers are herbivores, feeding on plants. Caterpillars, insects, grasshoppers, termites and hummingbirds are all examples of primary consumers because they only eat autotrophs (plants).
Secondary Consumer
Spiders, snakes, and seals are all examples of carnivorous secondary consumers. Omnivores are the other type of secondary consumer. They eat both plant and animal materials for energy. Bears and skunks are examples of omnivorous secondary consumers that both hunt prey and eat plants.
Decomposer
They include fungi along with invertebrate organisms sometimes called detritivores, which include earthworms, termites, and millipedes. Fungi are important decomposers, especially in forests. Some kinds of fungi, such as mushrooms, look like plants.
Humans may have type O, A, B, AB blood. This blood
type is a trait that is determined by?
Answer:
codominant alleles
Explanation:
very important test! will give brainly!
Answer:
This is so you can have your brainly (cause there has to be two answers for me to mark you as brainly)
btw its still jewelazil
In peas, long stem (A) is dominant over short stem (a). A heterozygous, long stem plant (Aa) is crossed with a homo-zygous, short stemmed plant (aa).
What percentage of plants will be heterozygous for long stem?
Question 8 options:
0%
25%
50%
100%
Answer:
c
Explanation:
A heterozygous, long stem plant (Aa) is crossed with a homo-zygous, short stemmed plant (aa).
What percentage of plants will be heterozygous for long stem? 50%
Parents : A a x aa
Offspring: Aa Aa aa aa
Ratio: 2 : 2
Percentage: 50% 50%
https://brainly.in/question/16772018
all Nucleotide elements
Answer:
The phosphate groups allow the nucleotides to link together, creating the sugar-phosphate backbone of the nucleic acid while the nitrogenous bases provide the letters of the genetic alphabet. These components of nucleic acids are constructed from five elements: carbon, hydrogen, oxygen, nitrogen, and phosphorous.
Explanation:
(GIVING BRAINLIEST!!)
Which types of reservoirs provide humans, animals, and plants with drinkable water?
A) Glaciers, lakes, and rivers
B) Polar ice caps, glaciers, and rivers
C) Lakes, rivers, and groundwater
D) Oceans, groundwater, and polar ice caps
Reservoirs which provide humans, animals, and plants with drinkable water are lakes, rivers, and groundwater.
What do you mean by reservoirs?A reservoir is an enlarged lake behind a dam. Such a dam may be either artificial, built to store fresh water or it may be a natural formation.
All basic functions of a reservoir can be made use of: storage, water conservation, flood control, water treatment, and aquatic environment. Reservoir systems can be either single- or multi-purpose systems.
A dam and reservoir may support navigation, recreation, flood control, irrigation, and water supply, with each multipurpose benefit providing significant social and economic impacts on a local, regional, and national level.
Learn more about reservoirs:
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#SPJ2
The heart rate increases during exercise. This increase in heart rate increases blood flow to the muscles. Explain, as fully as you can, why this increase in heart rate is necessary.
pls help I am on a timer, think it is biology but not sure
Answer:
Getting your heart beating faster than it's resting rate each day trains your body to move oxygen and blood to your muscles more efficiently. This helps your muscles use that fuel more economically as well, and ultimately you move with more ease. In other words, you end up in shape.
Explanation:
10. Feedback loops are ___
systems of information.
1.Isolated
2.open
3.closed
4.positive
how are dominant genes and recessive genes different ?
How does absolute age relate to geologic time?
the age of Rock in years is called its absolute age geologist find absolute age by measuring the amount of certain radioactive elements in the rock
how might a virus infect a cell and remian inside the cell without killing it
Answer: As you've learned, some viruses are released when the host cell dies, and other viruses can leave infected cells by budding through the membrane without directly killing the cell.
Explanation:
Humans tend to settle???
A. where fossil fuels are abundant
B. in regions of high biodiversity
C. in regions rich in resources we need to survive (ex. fertile land, water)
D. where it is hot and dry throughout the year
Answer:
Explanation:
Krista bought 35 feet of ribbon at the store. The ribbon cost $2 per linear
foot. The sales tax was 8%. If Krista paid with a $100.00 bill, how much
change should she have received? *
Step-by-step explanation:
·ж
Step-by-step explanation:
Answer:
Krista bought 35 feet of ribbon at the store. The ribbon cost $2 per linear
foot. The sales tax was 8%. If Krista paid with a $100.00 bill, how much
change should she have received? *
Step-by-step explanation:
Answer:
C. in regions rich in resources we need to survive (ex. fertile land, water)
Explanation:
Which two genes are most likely to be affected by a crossing over event?
A. a pair of genes located adjacent to another on a chromosome
B. a pair of genes separated by a third gene on a chromosome
C. a pair of genes located at opposite ends of a chromosome
D. a pair of genes located on different chromosomes
Answer:
c
Explanation:
becuase a pair of genes located opposite ends on a chromosome
A pair of genes located adjacent to another on a chromosome are most likely to be affected by a crossing-over event (Option A).
Linked genes are genes located on the same chromosome.Crossing over, also known as recombination, refers to the exchange of genetic material between non-sister chromatids during meiosis (Prophase I).During crossing over, linked genes are separated to be recombined between non-sister chromatids, thereby increasing the genetic diversity of the resulting germinal (gamete) cells.In conclusion, a pair of genes located adjacent to another on a chromosome are most likely to be affected by a crossing-over event (Option A).
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What are three kinds of volcanoes? What makes them different?
Answer:
Composite, shield, cinder cones, and supervolcanoes are the main types of volcanoes.
Composite volcanoes are tall, steep cones that produce explosive eruptions.
Shield volcanoes form very large, gently sloped mounds from effusive eruptions.
Volcanoes have several shapes, which are controlled by the composition of the magma and the nature of its eruption. If a volcano produces very fluid lava (low in the compound SiO2, or silica), the magma flows a long distance before it cools, making a flat, shield-shaped volcano.
Explanation:
DNA is the hereditary molecule that determines hair color in humans. However, the DNA molecule itself is colorless. How does DNA determine the hair color of individuals?
Answer:
This question lacks options, the options are:
A. The sequence of DNA determines the structure of lipids, which produce phenotypes.
B. The sequence of DNA determines the structure of proteins, which produce phenotypes.
C. The sequence of DNA determines the structure of phosphates, which produce phenotypes.
D. The sequence of DNA determines the structure of carbohydrates, which produce phenotypes.
The answer is B.
Explanation:
DNA is the genetic material found in the genome of living organisms. DNA holds the information needed for the synthesis of useful products in an organism. DNA contains segments called GENES that encodes the biological molecule, PROTEINS, which is responsible for the trait exhibited by organisms.
An example of trait in humans is human color, which is encoded by DNA. However, this DNA does not directly produce hair color in humans but the information held in it undergoes expression to produce protein called MELANIN, which is responsible for the hair color trait. Hence, the sequence of DNA determines the structure of proteins, which produce phenotypes (hair color).
what is the magnification of the eyepiece
Answer: I think the standard eyepiece magnifies 10x.
WILL GIVE BRAINLY!! WILL REPORT RANDOM ANSWERS.
1. Which of the following was NOT a part of the summary on Darwin's Theory of Evolution?
Organisms produce more offspring than what can survive
Struggle for Existence - Organisms will compete for resources
Species that live today descended from a common ancestor, with modifications to their traits.
Adaptations are acquired through the use of those traits.
2. Which of the following is NOT one of the main points of Natural Selection?
Variation
Use and Disuse
Adaptation
Overproduction
3. Which type of evidence was Darwin' UNABLE to use, because of the time period, in which he lived? Check all answers that apply!
fossil record
biochemical evidence/ biochemistry
comparative embryology
anatomical structures - homologous/ analogous/ vestigial
Biogeography/ Geographic Distribution
Answer:
1) Species that live today descended from a common ancestor, with modifications to their traits.
2) Use and disuse
3) Fossil record, comparative embryology, anatomical structures
When someone reads for a long period of time their eyes often get tired. This is most likely due to the continued
emission of blue rays from phone screen
why is it important to know a person's rhesus Factor before a blood transfusion
A patient who is Rh+ can receive Rh- blood
A patient who is Rh- can receive Rh+ blood
A patient who is Rh+ can receive only RH+blood
A patient who is Rh- can receive only Rh- blood
Answer:
Rh negative can only receive Rh negative blood
Explanation:
When a person has Rh negative blood and receives a transfusion of Rh positive blood, the body does not recognize the antigen and attacks it as if it were an invader. This makes the person’s body essentially attack itself.
How are heat and temperature related?
A :temperature and heat measure the same thing
B :thermometers measures he
C: Heat causes a change in temperature
Answer:
C
Explanation:
Heat causes changes in the temperature of objects
What is pollination? Identify three ways pollen can be transferred. How is cross-pollination different
from self-pollination?
Answer:
The transfer of pollen to a stigma, ovule, flower, or plant to allow fertilization. It can be transferred by things that feed from what has pollen. Self-pollination occurs when the pollen from the anther is deposited on the stigma of the same flower, or another flower on the same plant. Cross-pollination is the transfer of pollen from the anther of one flower to the stigma of another flower on a different individual of the same species.