The presence or absence of four limbs is not a useful character for studying evolutionary relationships among vertebrates, as it can be misleading. Other characteristics and genetic information should be considered to accurately determine evolutionary relationships.
Explanation:Reptiles are tetrapods that ancestrally had four limbs, but some species, like snakes, have secondarily lost or reduced their limbs over time. The presence or absence of four limbs is not a useful character for studying evolutionary relationships among vertebrates because it can be misleading. In the character table provided, the absence of four limbs in snakes does not necessarily mean they are more closely related to bass than to frogs, turtles, and leopards. It is important to consider other characteristics and genetic information to determine evolutionary relationships accurately.
These photographs show different types of eruptions. drag the name of the eruption type to the correct photograph.
A client diagnosed with testicular cancer expresses concerns about fertility. the client and his spouse desire to eventually have a family, and the nurse discusses the option of sperm banking. the nurse should inform the couple that sperm banking would need to be performed:
which event does not take place during interphase?
a. cellular growth
b. crossing over
c.duplication of chromosomes
d. production of organelles
Enzyme which seals dna fragments together
b. chemical mutagen
c. type of mutation that produces a reading frameshift
d. substance which induces change in dna bases
e. method by which dna is copied at cell division f. a change in dna base sequence g. procedure to screen chemicals for mutagenic properties h. closed circular dna, with few genes, non-essential to the cell i. chemicals produced by bacteria which kill other bacteria
The production of pink flowered plants from a cross between a red flowered plant and a white flowered plant is an example of
Answer:
incomplete dominance
Explanation:
I just did it on USA test prep.
Petroleum and natural gas form from _____.
Petroleum and natural gas are created from the remains of ancient marine microorganisms, such as plankton, that were buried under sediments on the ocean floor and subjected to high heat and pressure over millions of years, leading to the formation of these nonrenewable energy sources.
Planktons once dead, sank to the seafloor and got buried in sediments. Due to lack of oxygen, their decomposition was limited, allowing them to be preserved. Over millions of years, these organic materials were subjected to high temperatures and pressure as they were buried deeper into the Earth's crust. This process transformed their remains into the hydrocarbons that make up oil and natural gas. The hydrocarbons were then often mobilized from their original location and became concentrated in geological formations that can act as reservoirs.
The liquid component of this process is known as oil, while the gaseous part is primarily natural gas, which is predominantly methane (CH4). These fossil fuels are considered nonrenewable energy sources and are used by humans at a rate much faster than they were formed.
A patient who has raynaud's disease will begin taking an alpha-adrenergic blocker. the patient asks the nurse how the drug works to treat symptoms. the nurse explains that alpha-adrenergic blockers treat raynaud's disease by causing orthostatic hypotension. reflex tachycardia. decreased peripheral vascular resistance. vasodilation.
When the nurse researcher conducts an electronic literature search, the search yields more than 7000 citations for the topic. the researcher should make which of these interpretations of the finding?
An organism's genomic dna is analyzed and found to contain 22% thymine. what percentage of that organism's dna is guanine? 44% 22% 28% 78% 56%
Experiment 1: symmetry in common objects post-lab questions 1. safety glasses bilateral symmetry safety glasses have a bilateral symmetry because they are mirrored images of each side if they are cut exactly in the middle. 2. petri dish radial symmetry a pertri dish is radial symmetry as
Final answer:
Laboratory objects exhibit various types of symmetry, such as bilateral and spherical symmetry, which can be used to describe how these objects are uniform or can be divided into identical sections.
Explanation:
The types of symmetry displayed by common objects in a laboratory setting can describe how an object may be manipulated or divided into identical parts. Here's how symmetry in some common lab items can be described:
Safety Glasses: These typically display bilaterally symmetrical (mirror symmetry), meaning that they would look the same if split into left and right halves along the center.
Petri Dish: A petri dish displays spherical symmetry, looking the same from any angle around its center point.
Wash Bottle with Curled Straw: Due to the curled straw, this object does not exhibit perfect symmetry. However, the bottle itself may be considered to have cylindrical symmetry, depending on its design.
Top of a Chemical Bottle: The top of a chemical bottle often has cylindrical symmetry, appearing the same when rotated around the center axis of the cap.
Balloon: An inflated balloon can display spherical symmetry when it is perfectly inflated without any irregular bulges; however, this can vary with the shape of the balloon.
Understanding symmetry is important in many scientific contexts, including chemistry, where the symmetry of molecules can influence their properties and reactions.
which best describes autolysis
the depressant effect of starvation is?
The Depressant effect of starvation is impaired cognitive abilities, anxiety and chronic depression. The lack of nutrient supply and dehydration caused by it are such that thinking abilities are lowered causing irrational behaviors like irritation, aggression and anxiety. Starvation can also induce depression.
How can you determine the genotype of a plant that displays the dominant form of a trait?
do a testcross with a homozygous recessive plant --------- Gradpoint
which microscope is best used to see the organisms in a drop of pond water
Which compound is a metabolic intermediate of the light-independent reactions in photosynthesis? a. ATP b.3-PGA c.RuBP d.NADPH
Answer:
The correct answer will be option-B
Explanation:
The light-independent reaction of the photosynthesis is also known as the Calvin cycle. The Calvin cycle is a cyclic set of reactions which generates the 6 carbon glucose molecule from the carbon dioxide and other molecules.
The cycle forms two molecules of three-carbon compounds called 3-phosphoglycerate or 3-PGA. The 3-PGA gets converted to another three-carbon compound called G3P. The conversion of 3-PGA to G3P gains energy from the ATP and NADPH produced from the light reaction of the photosynthesis.
Thus, Option-B is the correct answer.
Which of the following best summarizes how hormone levels are controlled?
Answer:
its a feedback loop i am doing the test right now and i have my notes and its right
Explanation:
i have it on my test it is right
!!!
A ______ is a stem growing from a plant that periodically produces new stems and leaves on one side and roots on the other.
a)mitospore
b)rhizome
c)multiple fussion
d)stolon
why does many children have the same phenotypic characteristics as their parents?
All living things are made of one or more cells. Here are two types of cells: an animal cell and a plant cell. Sometimes when plants are under water stress, they wilt. Animals do not wilt! What analogy based on the plant cell structure explains wilting? A) The chloroplast are like a factory. When the plant is water stressed, the chloroplast stops producing energy and the plant wilts. B) The cell wall is like a cardboard box. When the plant is water stressed, the cell wall folds, like someone crushing the cardboard box. C) The large vacuole is like a water-filled balloon. When the plant is water stressed, the water leaves the vacuole and the plant cells start to shrink. D) The plasma membrane is like the drain in your sink. When the plant is water stressed, the plasma membrane stops water from entering the cell and the plant starts to wilt.
What other kinds of cues might be reliable indicators for predator presence?
Predator scents, warning cries, and marks are cues that might be reliable indicators for predator presence.
Further Explanation:
The change in a population can be decreased due to the gene flow and due to an increase in the number of predators. Thus, the genetic variation increases due to a decrease and increase in predators and food respectively. To determine the presence of predator is very necessary to safeguard them. There are many cues and signs which indicate the existence of predators. Some of them are:
Marks of predators Scent of predators
Animal usually secrete hormone that helps in determining the presence of predator. Also, warning cries of predators indicates the existence of them. Movement of predators can easily sense by the individual. Predators' habitat can also give insight if they still live there or not. Markings on the surroundings can also help in determining the activity and presence.
Learn more:
Learn more about the Graafian follicle https://brainly.com/question/4189307 Learn more about the human sperm and egg cells https://brainly.com/question/1626319 Learn more about the female reproductive tract https://brainly.com/question/9813796Answer Details:
Grade: High School
Subject: Biology
Topic: Ecology
Keywords:
Predators, presence, cues, activity, sign, marks, scent, animal, cry, warning, hormone, decrease, increase, movement, genetic variation, habitat.
In the snail cepaea nemoralis, an autosomal allele causing a banded shell, u, is recessive to the allele for an unbanded shell, u. genes at a different locus determine the background color of the shell. the allele for a yellow shell, b, is recessive to the allele for a brown shell,
b. a banded, yellow snail is crossed with a homozygous brown, unbanded snail. the f1 progeny are then crossed with banded, yellow snails in a testcross. predict the percentage of progeny in each phenotype if the two genes are linked with no recombination, if the two genes assort independently, and if the genes are 20 m.u. apart. place the percentage for each phenotype for each of the scenarios in the table below. percentages can be used more than once.
The predicted phenotypes differ based on whether the genes are linked with no recombination, assort independently, or are 20 m.u. apart. With no recombination, there will be 50% banded brown and 50% banded yellow progeny. Independent assortment or 20 m.u. apart genes result in a 25% and 40%-10% split among the four possible phenotypes, respectively.
To predict the phenotypes of the progeny in the given scenarios, we need to understand the genetics behind the snail's traits. The banded shell allele 'u' is recessive to unbanded 'U', and the yellow shell allele 'b' is recessive to brown 'B'. In the initial cross of a banded yellow snail (uubb) with a homozygous brown unbanded snail (UUBB), all F1 progeny will be UuBb (banded brown), as each allele is incompletely dominant over its counterpart.
For the testcross of F1 progeny with banded yellow snails, if the two genes are linked with no recombination, all progeny will display the parent phenotypes, since the alleles are inherited together. This would mean 50% banded brown and 50% banded yellow. If the genes assort independently, we would expect a phenotypic ratio of 1:1:1:1, following Mendel's law of independent assortment, resulting in 25% of each possible phenotype. When the genes are 20 map units (m.u.) apart, implying a 20% recombination rate, the expected phenotypes will be: 40% banded brown, 40% banded yellow, 10% unbanded brown, and 10% unbanded yellow.
Any change in allele frequencies in a gene pool is
On a percentage basis, what type of sequence comprises the most of the human genome? what type of sequence comprises the least?
Non-coding….exons. Most part of the human genome does not code for proteins. They include what was then referred to as ‘junk DNA’. Noncoding regions contain introns and transposable elements, telomeres, and centromeres. Exons, on the other hand, are the regions of the DNA that code for proteins that are responsible for the normal body functions.
Digitized information can be used by computers. Please select the best answer from the choices provided T F
Digitization is the process of converting information into a digital format. The statement that digitized information can be used by computers is true. And not is only true, but digitized information is the only information computers can understand and work with. Digital information means computer-readable information.
Different types of cells within an organism ______.
A.Do not have any function
B.Can Survive on their own
C.Server a different Function
D.Are all the same
11Points No Brain :p
Which of the following statements is true? Friction works in the direction opposite of motion. Lubrication can be used to increase friction. Only large masses exert gravitational force. Air resistance is greatest for objects with small surface areas.
Jeremy's trainer should have taken a physiology class. If he had, he would know that the use of steroids (in addition to other problems) actually increases_____________________, which is counterproductive to improving bone density.
The answer is Parathyroid Hormone (PTH). Steroids reduce calcium levels in the blood. This results in activation of the parathyroid hormone that is essential in the metabolism of calcium in the blood. PTH induces reabsorption of calcium from bones to restore homeostasis Ca2+ levels in the blood hence causing osteoporosis. Osteoporosis causes an increased risk of bone fractures.
Which of the following best describes an advantage of artificial selection?
Can increase the variation in a certain species
Helps produce offspring having desired traits
Helps produce offspring who do not suffer from diseases
Can make species immune to changes in the environment
The statement 'helps produce offspring having desired traits' BEST describes an advantage of artificial selection.
Artificial selection refers to a type of selection made by humans in order to produce pans or animals with desired traits.Artificial selection consists of mating organisms having desired features in order to select offspring that exhibit inherited traits.This process (artificial selection) is well known to reduce the genetic variation in the resulting population as a consequence of selective mating.In conclusion, the statement 'helps produce offspring having desired traits' BEST describes an advantage of artificial selection.
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All diabetic patients with hyperlipidemia should be treated with:
Although a star might look brighter than the Sun, a comparison of its ______________ magnitude might help prove that they have the same real brightness.
Answer:
Although a star might look brighter than the Sun, a comparison of its Absolute magnitude might help prove that they have the same real brightness.
Explanation:
Apparent magnitude measures the brightness of a celestial body from the Earth at its actual position.
Absolute magnitude is the apparent magnitude of the same body when it is at a distance of 10 parsecs.
A star might look brighter than the sun but actual comparison of the brightness can be done by comparing the absolute magnitudes of the two stars.