Answer:
Explanation:
Males have the sex chromosome XY and females have the sex chromosomes XX . Cross a male with female and determine what percent of offspring will be female .
why do snails like leaf litters
Answer:
They will eat the biofilm that grows on the leaves. My snails love my oak leaf litter, as do my loaches. They eat the film off them.
Explanation:
In a cross between individuals that are Aa x Aa, how many boxes of the Punnett square will show an offspring that is AA?
Answer:
1 box
Explanation:
25% AA
50% Aa
25% aa
PLS PLS HELP
An area surrounded by tall mountains contains a very large, isolated population of green and white peacocks. During the mating season, the male peacocks demonstrate flashy feather displays to attract females, who usually choose green peacocks over white ones. A biology student tabulates the following information.
Genotype
Plumage Color % of Population Allele Controlled Phenotype
FF or Ff
Dark green
84%
F (dominant)
Dark green plumage
ff
White
16%
f (recessive)
White plumage
Using this information, the student plans to use the Hardy-Weinberg equation to predict the allele frequencies in future peacock generations. Why would her research advisor have a problem with this? (2 points)
Group of answer choices
The student needs the percent of the population with the Ff genotype in order to find the F frequency.
Her research advisor would first want her to find the males' mating success rate for the calculations.
The peacocks are sexually selective when choosing mates, so future allele frequencies may drift.
Since the peacock population is isolated, its alleles would shift away from Hardy-Weinberg equilibrium.
Answer:
The peacocks are sexually selective when choosing mates, so future allele frequencies may drift.
Explanation:
What does uranium do to the environment
no links! pls help
What process is occurring in the illustration?
a) classic ecosystem
b) climax community
c) primary succession
d) secondary succession
classic ecosystem
Explanation:
because i love
Answer: D
Secondary Succession
Explanation:
I took the quiz.
Fossils and Evolution On Study Island
A team of scientists are studying three different layers of sedimentary rock to learn about a particular reptile species. In the layer of rock that is closest to the Earth's surface, the reptiles' teeth fossils are found to be short and straight. In the layer below, the reptiles' teeth fossils are found to be long and straight. In the layer below that, the reptiles' teeth fossils are found to be long and curved.
Based on this information, the reptiles today most likely have
A.
long, straight teeth.
B.
no teeth.
C.
long, curved teeth.
D.
short, straight teeth.
Answer: short, straight teeth
Explanation: study island
distinguish between absorption and reabsorption in the mammalian body
Answer:
Tubular reabsorption is the process that moves solutes and water out of the filtrate and back into your bloodstream. This process is known as reabsorption, because this is the second time they have been absorbed; the first time being when they were absorbed into the bloodstream from the digestive tract after a meal.
Explanation:
An example of an involuntary movement would be -
A dancing
B swing a club
C heartbeat
D walking
Answer:
C. heartbeat
Explanation:
Answer:
Option C
Explanation:
Because the rhythm is not something that we do voluntarily. We're not able to control the movements of our heart and therefore Heartbeat is an example of involuntary movement.
Which of the atomic models represents the most reactive element?
A. Argon, because it has three energy levels with eight electrons in the third level.
B. Lithium, because it has two energy levels with one electron in the second level.
C. Aluminum, because it has five energy levels with two electrons in the third level.
D. Carbon, because it has two energy levels with four electrons in the second level.
The most reactive element is represented by the atomic model for lithium, which consists of two energy levels with an electron in the second level. So, the correct option is B.
What is Reactive element?A reactive element is one that forms chemical bonds with other elements to obtain a stable electron configuration. Reactive elements are chemically unstable. The amount of valence electrons in an element's highest energy level determines how reactive it is.
The element with the fewest number of energy levels and most reactive valence electrons in the above example is lithium, which has only two energy levels and one electron in the second level. Lithium in this state has one valence electron, which makes it very reactive and predisposed to form bonds with other elements filling its outermost shell.
Therefore, the correct option is B.
Learn more about Reactive elements here:
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Vascular resistance is due to friction between blood and the walls of the blood vessel. Which of the following causes low vascular resistance?
obesity
dehydration
high blood pressure
cholesterol levels within normal range
Answer:
Cholesterol levels within normal range
Explanation:
Vascular resistance is due to friction between the blood and the walls of the blood vessel, and cholesterol levels within the normal range can cause low vascular resistance, which is the last option.
What is vascular resistance?Vascular resistance is the resistance to blood flow in the blood vessels, which is determined by the diameter of the blood vessels, blood viscosity, and the length of the blood vessels, so when blood flows through the blood vessels, it experiences frictional forces due to the interaction between the blood and the walls of the blood vessels, obesity, dehydration, and high blood pressure can all contribute to increased vascular resistance.
Hence, the correct answer is that cholesterol levels within the normal range can cause low vascular resistance, which is the last option.
Learn more about vascular resistance here.
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A 16-year-old girl is diagnosed with kidney failure. Despite receiving dialysis treatments for three months, her doctor tells her that she will need a kidney transplant. Her brother volunteers to donate his kidney How will he be able to survive if he donates his kidney?
Answer:
we have 2 kidneys
Explanation:
the doctor already knows that we can have one lung or kidney
Answer: A human just needs one out of the two kidney's to function. Once the brother has one kidney, that kidney will grow in size in order to adapt.
What can occur nitrogenous bases do not pair correctly?
Answer:
Incorrectly paired nucleotides cause deformities in the secondary structure of the final dna molecule.
Explanation:
NO LINKS I WILL REPORT U
Answer:
Both of these are correct
moves constantly between Earth's surface and the atmosphere
and it is matter that is essential for life
Answer:
Water is matter is essential for life
Explanation:
Sand for beaches comes from rocks in the area that are weathered down, and
their sediment is deposited in the area beaches. The beaches are then eroded,
and the sediment is moved away from the beaches. If rocks stopped weathering,
how would the beach change?
Answer:
Beaches would shrink until they were no longer there because the sediment is pulled away from the shores by the tide and there would be no new rock sediment to replace the old rock sediment.
state two differences between tastic and nastic movement in plants
Answer:
Explanation:
Tactic movement;
Movement is directly towards/away from stimulus
Stimuli consist of light/heat/chemical
Nastic movement;
non-directional movement
stimulus is touch/tugor pressure.
Explanation:
1.Movement is directly towards/away from stimulus
2.Stimuli consist of light/heat/chemical
for tastic movement
What is the answer pleaseeee
Answer: c
Explanation:
WILL GIVE BRAINLIEST IF CORRECT
The dog breed shown below has been bred for many generations. It has been bred for its small size and friendly temperament. This is an example of...
a. Cloning
b. Artificial selection
c. Genetic engineering
d. Asexual reproduction
Answer:
yostos its c!!
Explanation:
wassup from Mrs hees 4th period sciens at bms!!
A freckled man marries a woman without freckles. They have four children, two with freckles, and two without freckles. What are the genotypes of all these people?
Answer:
The genotype of the father: Ff
The genotype of the mother: ff
The genotype of the two children without freckles: ff
The genotype of the two children with freckles: Ff
Explanation:
Freckles (F) are is dominant trait, so one dominant allele in the genotype of an individual will cause he/she to have freckles. Since the father has freckles, but only two of his children has freckles; that means that he has a heterozygous genotype. In the Punnett Square, the offsprings' genotypes are shown, as well as the parents'.
A freckled man marries a woman without freckles, and they have four children, two with freckles and two without, so the genotype of the parents are Ff, ff and the children with freckles are Ff, while the freckleless are ff types.
What is the significance of the freckle trait?There are both dominant and recessive traits that determine the person's quality, such as freckles, which are dominant over being freckleless. When the parents with freckles cross with the parents without freckles, they will produce half the freckles and half the freckleless. The parent with a freckle is heterozygous (Ff), so two types of gametes will be produced, such as F and f, and will form Ff and ff offspring when crossed with the freckleless parent (ff).
Hence, a freckled man marries a woman without freckles, and they have four children, two with freckles and two without, so the genotype of the parents are Ff, ff and the children with freckles are Ff, while the freckleless are ff types.
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4) Aos poucos, as pessoas estão aderindo às lâmpadas de LED que são mais eficientes, pois
proporcionam a mesma energia luminosa de outras lâmpadas com menor consumo de
energia elétrica, ou seja, são mais econômicas. Sabendo disso, considere uma residência que
apresenta 8 lâmpadas fluorescentes compactas de 11 W que ficam acesas 5 horas por dia.
a) Qual o consumo de energia elétrica, em kWh, apresentado por essas lâmpadas em 1
mês (30 dias)?
b) Se cada uma das lâmpadas for trocada por uma lâmpada de LED de 7 W que
proporciona a mesma iluminação, qual será o novo consumo de energia elétrica, em
kWh, apresentado por essas lâmpadas em 1 mês (30 dias)?
c) Qual a quantidade de energia economizada em 1 mês (30 dias) com a troca das
lâmpadas?
d) Em um local onde o kWh custa R$ 0,50, qual o valor economizado anualmente na conta
de energia elétrica?
Answer:
umm I'm not sure how to answer this
Which most likely happens to the ovary of a flower after it is fertilized?
a. It produces pollen.
b. It grows into a fruit or vegetable.
c. It grows new sepals to attract insects.
d. It completes photosynthesis.
Answer:
It grows into a fruit or vegetable.
Why do your mitochondria come from your mom?
Answer:
the mitochondria in mammalian sperm are usually destroyed by the egg cell after fertilization.
Explanation:
Describe Charles Darwin's theory of natural selection
Answer:
it sghwbdhfbwahdfk
Explanation:
Answer:
Explanation:
Darwin's Theory of Evolution by Natural Selection
More individuals are produced each generation that can survive. Phenotypic variation exists among individuals and the variation is heritable. Those individuals with heritable traits better suited to the environment will survive.Charles Darwin's theory of evolution states that evolution happens by natural selection. Individuals in a species show variation in physical characteristics. ... As a consequence those individuals most suited to their environment survive and, given enough time, the species will gradually evolve.
WILL GIVE BRAINLIEST IF CORRECT
At one time, farmers had to spray insecticides on their fields to protect their crops from insects. Today, farmers can buy seeds that produce plants that are resistant to many insects. Which process contributed to the development of these seeds?
a. Cloning
b. Artificial Selection
c. Genetic Engineering
d. Asexual Reproduction
Answer:
C
Explanation:
Genetic Engineering is the largest contributor, but there's an argument to be made for artificial selection.
Answer:
The Answer Is C!!
Explanation:
once again, wassup yostos from bms Mrs hees 4th pd
list four characteristics of living organisms and explain one
sensitivity or response to the environment
reproduction
growth and development
regulation
homeostasis
and energy processing
Explain one: living organisms reproduction. Living thing can reproduce without receiving any cells from another living thing.
Hope this helped. o(*￣︶￣*)o
What consists of all the living organisms in an area and the
non-living aspects of the environment?
a Ecosystem
b Community
C Population
Answer:
a. Ecosystem
Explanation:
Ecosystem
An ecosystem consists of all the living things and nonliving things interacting in the same area.
What does biodiversity mean ?
Answer:
biodiversity mean Biodiversity, also called biological diversity, the variety of life found in a place on Earth or, often, the total variety of life on Earth.
Explanation:
Answer: Biodiversity is a term used to describe the enormous variety of life on Earth. It can be used more specifically to refer to all of the species in one region or ecosystem. Biodiversity refers to every living thing, including plants, bacteria, animals, and humans.
Explanation: Usually three levels of biodiversity are discussed—genetic, species, and ecosystem diversity.
Genetic diversity is all the different genes contained in all individualplants, animals, fungi, and microorganisms. It occurs within a species as
well as between species.
Species diversity is all the differences within and between populationsof species, as well as between different species.
Ecosystem diversity is all the different habitats, biological communities,and ecological processes, as well as variation within individual ecosystems.
HELP!!
Question 1 (2 points)
What is the phenotypic ratio of the F2 generation?
Answer:
9:7
Explanation:
We get the dominant phenotype in plants that have at least one dominant allele of EACH of the two genes; otherwise we get the recessive phenotype. So, the observed ratio in the F2 generation is 9:7.
So, this is your answer.
A substace put in a space or cantainer to fill it, usually applied in wood to fill up cracks and grooves
Answer:
Glue and sawdust.
Explanation:
Glue and sawdust are the substances that applied in wood to fill up cracks and grooves. You can use the glue and sawdust method to fill the gaps present in the wood. This method is a quick and easy solution that successfully fill up the gaps and grooves on the wood. The method of using this method is, first fill the gap with a small amount of wood glue, then rub sawdust into the gap which attached the saw dust with itself and the gaps are filled.
Many research studies have shown that different species may possess some of the exact same genes but show vastly different traits. How can that happen?
Answer:
Mutation can occur or the order in which these genes appear are in different order. Genetic variation can also occur.
