A cell is a unit of life It includes features from all cell types. A cell consists of three parts: the cell membrane, the nucleus, and, between the two, the cytoplasm. Within the cytoplasm lie intricate arrangements of fine fibers and hundreds or even thousands of miniscule but distinct structures called organelles.
If a male has a disease that is Y-linked, what percentage of his sons will inherit the disease?
Final answer:
Sons will have a 100% chance of inheriting a Y-linked disease from their father because they receive their father's Y chromosome.
Explanation:
If a male has a Y-linked disease, each of his sons will inherit the Y chromosome that carries the disease gene. Since males only have one Y chromosome and they inherit it directly from their fathers, the probability that a son will inherit a Y-linked disease from his affected father is 100%. This differs from X-linked genetic disorders, where the chance of inheritance varies depending on the mother's genotype and the sex of the offspring.
What is the most likely effect on the energy pyramid if all producers are removed from the ecosystem??
Answer:
c) the energy pyramid will be completely disturbed.
Explanation:
in rabbits, B represents the allele for black coat and b represents the allele for a white coat. black is dominant over white. if a rabbit has the genotype BB what is the rabbits phenotype?
a) gray
b)black
c)white
d)BB X bb
Answer:
Black
Explanation:
A dominant allele for a given gene is the one that can express itself in both homozygous as well as heterozygous conditions.In the given question it has been stated that the allele B is dominant over b, and since the allele B codes for black coat color, this means that the rabbit having the phenotype BB will have black coat color.How has the Douglas-fir adapted to enable its survival in the taiga biome?
a.
low growing
b.
perennial
c.
waxy needles
d.
survive on limited nutrients
Answer: c. waxy needles
Taiga is the biome with needle leaf trees. It is a cold biome. Douglas-fir have long, thin and waxy needle shaped leaves. Wax prevents the loss of water through transpiration and also prevents freezing and leaves being drying out.
The diagram below represents two cells viewed using the same magnification with the same microscope.
One possible conclusion that can be drawn about the activity of these two cells is that
Based on the visible features, one possible conclusion is that Cell B is more active than Cell A. The correct option is B. more active transport occurs in cell A than cell B.
Based on the image you sent, here are some possible conclusions that can be drawn about the activity of the two cells:
Cell A:
Less active: The presence of a cell wall suggests Cell A is a plant cell. Plant cells typically have less metabolic activity compared to animal cells due to their slower growth rates and photosynthetic energy production.
Storing energy: The large central vacuole in Cell A could indicate storage of excess nutrients or waste products, suggesting lower metabolic activity compared to Cell B.
Cell B:
More active: The absence of a cell wall suggests Cell B is an animal cell. Animal cells are generally more metabolically active than plant cells due to their diverse functions and constant need for energy from external sources.
Engaged in protein synthesis: The prominent rough endoplasmic reticulum (RER) in Cell B indicates high protein production activity, suggesting a more active metabolic state compared to Cell A.
Complete Question:
The diagram below represents two cells viewed using the same magnification with the same microscope.
One possible conclusion that can be drawn about the activity of these two cells is that:
Why are chloroplast green
Which trilobite characteristic did not change through time? a. shape of eyes c. number of body segments b. 3-lobed body d. number of spines d. number of spines is a trilobite characteristic does not change through time.
The right answer is the lobed body.
The name trilobite comes from the subdivision of the body into three longitudinal lobes:
A medial lobe, the rachis,
And two lateral lobes, the pleura.
There is also a subdivision into three regions from front to back: the cephalon ("head"), the thorax and the pygidium ("tail").
The number of spines is a trilobite characteristic that did not change over time, unlike the shape of their eyes or the number of body segments.
Explanation:Trilobites are an extinct group of marine arachnomorph arthropods. They are recognized by their characteristic 3-lobed, 3-segmented body structure. Although trilobites underwent numerous changes over time due to evolution, one characteristic that did not change was the number of spines. The number of spines remained consistent throughout the trilobite's existence. This is in contrast to other trilobite characteristics such as the shape of their eyes or the number of body segments, both of which evolved over time in response to changing environmental conditions.
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What cell organelle controls the activities of the entire cell?
Nucleus is called the brain of the cell. Nucleus is the organelle which controls the activities of the cell.
The command center of eukaryotic cells is the nucleus. Additionally, it controls how genes and gene expression are coordinated in Chromosomes, nuclear membrane, nucleoplasm, and nucleolus make up the nucleus' structure. When compared to other cell organelles, which make up around 10% of the cell's volume, the nucleus is the most noticeable organelle. A eukaryotic cell typically possesses the one nucleus. Some eukaryotic cells are enucleate.
The first organelle to be identified or found was the nucleus. The nuclear envelope, which is a nuclear membrane, the nucleoplasm, the nucleolus, and the chromosomes make up the cell nucleus. The matrix found inside the nucleus is known as nucleoplasm, sometimes known as karyoplasm. The cytoplasm and the components of the nucleus are separated by the nuclear membrane.
Therefore, nucleus controls the cell and its activities.
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Environmental science, check my answers?
1. Most familiar life forms live in regions of biomes that humans inhabit.
True <
False
2. Biodiversity is the variety of life forms that exist or existed in the past.
True <
False
3. Changes in an organism can't occur because of an outside force, such as a massive earthquake.
True
False
Your best answers are T T F
Which of the following statements is not true of the use of genetically engineered bacteria for insulin production? Using genetically engineered bacteria makes insulin production much faster and produces larger quantities. Genetically engineered bacteria make higher quality insulin that is more easily used by diabetics. Genetically engineered insulin made from bacteria is much cheaper to produce.
Which of the gazelle’s naturally selected traits is shown in this picture to be an evolutionary advantage?
a)feeding only at certain times of the day
b)coat color for blending in with dry grass
c)specialized gut due to a diet of grasses
d)specific gender roles to diminish predation
which of the following could describe a population that is decreasing in size
A population that is decreasing in size can be due to factors such as low birth rates, high death rates, emigration exceeding immigration, or environmental changes affecting reproductive success. Genetic diversity plays a crucial role in the vulnerability of a population to decline, making it more susceptible to recessive lethal alleles and changing environmental conditions. The extinction vortex describes how declining populations face increasing risks of extinction due to loss of genetic diversity, inbreeding depression, and other factors.
Someone plz help I'm super confused
A gardener accidentally trims the leaves of a green plant too short. The leaves are now much smaller. He notices that the plants grow more slowly than it used to. Which sentence best explains why the plant grows more slowly?
A - The plants has too many thylakoids in its cells
B - The plant now gets too much sunlight to be healthy.
C - The platn has more cholorplast in its cells
D - the plant has less cholorphyll to produce energy.
The right answer is D.
Light is essential for any plant so as chlorophyll. They allow plants to convert light energy into sugars.
It appears that a correlation links productivity and chlorophyll under special conditions. The more chlorophyll there is, the more electron transfer is ensured, the more photosynthesis is amplified and the more oxygen and glucose are produced.
The amount of Chlorophyll contained in the leaves provides information on the health of the plant, its vigor and ensures that its Nitrogen requirements are met. The trace elements necessary for the plant are drawn by the roots in the soil.
Although the plant can grow nearly 200 feet tall, it has a very shallow root system. This feature best suits it to climates that receive regular precipitation.
In which biome would you most likely find this plant?
A) chaparral
B) savanna
C) temperate forest
D) tundra
What characteristic distinguishes the five groups of fungi?
First one to answer these science questions will get brainliest/5 star/ thanks
7. Which is most like a glacier changing Earth's land?
A. a bird lapping water from a puddle
B. a boy raking leaves into a pile
C. a stream rushing down a hill
D. a bulldozer pushing and piling anything in its path
8. Which of the following weather events can help nature?
A. floods
B. tornadoes
C. hurricanes
D. landslides
9. Which of the following describes how sediment (weathered rock and soil) moves from one place to another?
A. Flying insects and birds carry it
B. it is carried through the roots of plants
C. It is carried by rapidly moving water
D. it is carried in the waste products of animals
10. Gravity pulls rainwater downhill and the flowing water erodes the landscape by _______.
A. forming sand dunes
B. washing away soil
C. forming a desert
D. moving rocks and boulders
11. What is one way that scientist learn about Earth's interior?
A. by comparing soil samples
B. by studying seismograms recorded during earthquakes
C. by using telescopes
D. by taking x-rays
12. What parts of Earth did glaciers cover during the Ice Age?
A. all of earth
B. only areas near the north pole and south pole
C. much of earth, including parts that are much warmer toady
D. only oceans, not land
Several species of warblers can live in the same spruce tree ONLY because they?
have different habitats within the tree.
don’t eat food from the tree.
occupy different niches within the tree.
can find different temperatures within the tree.
6.
Compared to the time in Earth's history before humans appeared, rates of soil erosion are _____.
about the same
faster
slower
more unpredictable
7.
The process responsible for moving material downslope under the influence of gravity is called _____.
erosion
weathering
mass movement
soil formation
8.
Why can the removal of vegetation trigger mass movements?
The soil loses nutrients and begins to crumble.
The plant roots bind the soil and regolith together.
The shaking triggers mass movements.
The plan6.
Compared to the time in Earth's history before humans appeared, rates of soil erosion are _____.
about the same
faster
slower
more unpredictable
7.
The process responsible for moving material downslope under the influence of gravity is called _____.
erosion
weathering
mass movement
soil formation
8.
Why can the removal of vegetation trigger mass movements?
The soil loses nutrients and begins to crumble.
The plant roots bind the soil and regolith together.
The shaking triggers mass movements.
The plan ...?
6. Answer;
- Faster
Explanation;
Compared to the time in Earth's history before humans appeared, rates of soil erosion are faster.
-Soil erosion is the wearing apart of topsoil. Topsoil is the top covering of soil and is the abundant fertile because it includes the several natural, nutrient-rich minerals. Every year, around 75 billion tons of soil is disintegrated from the land—a rate that is about 13–40 times as quick as the typical rate of erosion.
Additionally, some human activities associated with building structures increases the rate of erosion
7. Answer;
-Mass movement
The process responsible for moving material downslope under the influence of gravity is called mass movement.
Explanation;
-A mass movement is the geomorphic process through which soil, sand, regolith, and rock move downslope typically as a solid, continuous or discontinuous mass, largely under the force of gravity.
-It involves the sudden movement of a block of material along a flat, inclined surface is called a rock slide or a slide.
8. Answer;
The plant roots bind the soil and regolith together.
The removal of vegetation may trigger mass movements because the plant roots bind the soil and regolith together.
Explanation;
-Vegetation removal can trigger mass wasting or mass movement as vegetation stabilizes soil. When it is removed from a slope, the slope is vulnerable to water and wind erosion.
All cells have DNA or pther genetic materials . Is this apart of the cell theory or not apart
7. This question is based on the following poem.
Some say life's a Monopoly game,
spread like a picnic to kill the grass,
assuring no winners save some ants,
until amid the fading rants,
none there are to punch one's pass
into the halls of fame.
The metaphor for life in this poem is
A. a picnic.
B. halls of fame.
C. some ants.
D. a monopoly game.
The metaphor for life in the poem is a Monopoly game, as the poem begins with 'Some say life's a Monopoly game,' comparing life's journey to the board game.
The metaphor for life in the poem given is D. a Monopoly game. The opening line of the poem, "Some say life's a Monopoly game," explicitly states that life is being compared to the board game Monopoly. This is an example of metaphor as a literary device, where life is not literally a board game, but it is being compared to one in order to illustrate the idea that life, like Monopoly, has various ups and downs, successes and failures, and is ultimately a game of chance and strategy.
Which of the following plant adaptations protects grassland plants from grazers?
a.
long roots
b.
growing low to the ground
c.
water storage
d.
growth pattern
The correct answer is:
d. growth pattern
Explanation:
Plants in the grassland must face dry situations, fires, and grazing animals. They have long, narrow leaves, long roots, soft stems, and can even go lethargic to sustain their tough environment. They have adjusted how they grow and scatter their pollen and seeds so that more plants can live in this incredible habitat.Average growth is the series of changes in height, weight, and head circumference that are harmonious with authorized standards for a released population.
Which of the following best describes integrated pest management?
A. The practice of using pesticides early in the growing season to minimize pest populations
B. The practice of using biological, cultural, environmental, and chemical means to control pests
C. The practice of using no synthetic fertilizers or pesticides to control pests
D. The practice of using only strong pesticides to control pests
Answer:
The correct answer for: Which of the following best describes integrated pest management? Is: B. The practice of using biological, cultural, environmental, and chemical means to control pests
Explanation:
To understand this answer we need to remember what IPM of integrating pest management is. IPM is the combination of biological, cultural, environmental and chemical means to minimize the local threat of pests in the crop or area of attention. First of all the objective is not to eradicate, exterminate or extinguish. But control them in other words, they will still be there but won't mean damage or danger to the crop or zone. Now, IPM seeks to do the least amount of damage to humans and the pests. So pesticides and fungicides are not welcomed in it. So, IPM is a whole strategy of changing the environment so that those pests won't mean an economical threat.
How big is a blood cell? How does its size compare to Dust Mites, and then to the E. coli bacteria
Which characteristic is most important in determining whether a hypothesis will be incorporated into a theory?
Secretion of which hormone is controlled by a positive-feedback mechanism?
Progesterone
Testosterone
Oxytocin
Answer:
Oxytocin
Explanation:
Positive feedback mechanism is the one by which the changes leads to more changes of same type.
During child birth, the head of the baby is pressed against the cervix which in turn send the nerve impulses to brain. Brain makes the pituitary gland to secrete the hormone oxytocin. Oxytocin is released in blood and causes the uterine contraction. As labor continues, more stimulation of cervix and intense uterine contractions lead to more release of oxytocin.
Brandon wants to maintain his weight for wrestling. He eats large meals, but then vomits the food shortly after. Brandon has _____.
bulimia
anorexia
alcoholism
lung cancer
Which of the following molecules get recycled during photosynthesis
When the light absorbs by the photosynthetic apparatus, the water molecules break down to produce essential material to continue the photosynthetic cycle as electron and H-ions. The H-ions becomes stored in thylakoid chamber and passed through the ATP synthetic machines to refill the ADP or AMP molecules. The generated electron passes through the various stages of photosynthetic series to finally produce the NADPH which also acts as energy transfer compound. At the PSI, the electron transfer to the NADP to generate NADPH.
What happens after pollen lands on the stigma of a flower? it grows a tube to travel down to the ovary.it fertilizes the plant at the stigma.it grows a tube to travel to the style.it grows a tube to travel to the petal.?
Answer: it grows a tube to travel down to the ovary
Explanation:
As a result of pollination, pollen grain lands on the sigma of the pistil or carpel. On the stigma pollen grain begins to germinate and grows a long pollen tube. The pollen tube grows longer and makes its way from the stigma, down the style and reaches to the ovary. Pollen tube carries two male gametes or sex cells. One male gamete fertilize the egg cell to produce zygote and the gamete fuses with polar nuclei to form primary endosperm cell.
Answer:
It grows a tube to travel down to the ovary
Explanation:
Find the independent and dependent variables. "If skin cancer is related to ultraviolet light, then people with a high exposure to UV light will have a higher frequency of skin cancer. ...?
Answer:
skin cancer is and ultraviolet light
Explanation: