Answer:
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.
Which sentence describes the big bang theory?
A. Because the universe is expanding, scientists conclude that in the
distant past, all matter was evenly distributed.
B. Because the universe is contracting, scientists conclude that in
the distant future, all matter will be converted to energy.
C. Because the universe is contracting, scientists conclude that in
the distant future, all matter will be compressed into a single
point.
D. Because the universe is expanding, scientists conclude that in the
distant past, all matter was compressed into a single point.
Answer:
D. Because the universe is expanding, scientists conclude that in the distant past, all matter was compressed into a single point.
What are the protein and energy requirements for a male athlete
Explanation:
The Academy of Nutrition and Dietetics, Dietitians of Canada and the American College of Sports Medicine recommend 1.2 to 2.0 grams of protein per kilogram of body weight per day for athletes, depending on training. Protein intake should be spaced throughout the day and after workouts.
Why were the high concentrations of DDT in the birds bodies?
Answer:
because chlorinated hydrocarbons accumulate in fatty tissues, when a ton of contaminated fishes is turned into 200 pounds of seabirds, most of the DDT from the numerous fishes ends up in relatively few birds. As a result, the birds have a higher level of contamination per pound than the fishes.
btw :
stay safe! :3
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What do scientists say makes the Galapagos Islands unique?
O A. the different kinds of plants living on the islands
B. the large numbers of species living on the islands
O c. the different animal species living on the islands
D. the large numbers of marine iguanas on the islands
Answer:
B
Explanation:
Nearly 9,000 species are found on the islands and their surrounding waters, many of them endemic.
The energy required to get a reaction started is called activation energy.
]
True
False
Answer:true
Explanation:
Based on the relationship between photosynthesis and CO2, explain why CO2 concentrations cycle over the course of a year?
Explanation:
the amount of CO2 found in the atmospheres varies over the course of a year how much of this variation happens because of the role of plants in the carbon cycle respiration occurs all the time but dominates during the colder months of the year resulting in higher CO2 levels in the atmosphere during those months.
*hope this helps*
Scientists are studying the mating habits of a population of butterfly fish on a Caribbean coral reef. They discover that both the largest and smallest males get the most mates and pass on the largest number of genes to the population's offspring. The largest males get a large number of mates because they can guard the females, preventing most of the smaller males from mating. However, the very smallest males also get a large number of mates because they escape the notice of the larger males and are able to mate with the females quickly. Based on these observations, which selective force appears to be acting on male body size in this population?
Answer:
The correct answer is - Disruptive selection.
Explanation:
Disruptive selection is a mode of natural selection that exhibits that two extreme values of phenotypic traits of the population are favored by this population than the population with their intermediate values. Disruptive selection occurs when there is a fitness advantage of extreme values of phenotypic traits over more intermediate phenotypes.
In this case, the largest males mates more, due to fact that they can guard the females, than smaller males. The smallest fishes also get a high number of mates as are able to mate with the females quickly without coming to the notice of larger males.
Scientists have made estimates to the loss of biodiversity in the Mediterranean Sea over the next ten years due to various human-
influenced factors. The graph depicts the changes in biodiversity at present and in ten years (predicted). Which statement(s) below
are supported by the graph? Choose ALL that apply.
A)
Climate change will increase the loss of biodiversity at a greater rate than
pollution
Invasive species will have a greater impact in loss of biodiversity in ten
years than pollution
B)
C)
"Habitat degradation is and will continue to be the leading cause of
biodiversity loss in the Mediterranean Sea.
D)
The loss of biodiversity in the Mediterranean Sea will increase for nearly
every factor over the next ten years.
E)
Exploitation of species in the Mediterranean Sea will lead to the greatest
decline in biodiversity in the area in ten years.
Scientists have made estimates of the loss of biodiversity in the Mediterranean Sea, and this is due to human interference, climate change will increase the loss of biodiversity, habitat degradation, and exploitation of species, so answers A, C, D, and E are all correct.
What is the significance of the loss of biodiversity in the Mediterranean?Biodiversity is low in almost every region of the world due to rapid urbanization, which has resulted in the rapid loss of plants and animals as well as a decline in their numbers due to habitat loss, and they are further impacted by climate change.
Hence, scientists have made estimates of the loss of biodiversity in the Mediterranean Sea, and this is due to human interference, climate change will increase the loss of biodiversity, habitat degradation, and exploitation of species, so answers A, C, D, and E are all correct.
Learn more about the loss of biodiversity here.
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The term "AIDS" means a condition which limits the body's ability to fight
infections.
True
False
Answer:
True
Explanation:
HIV and Aids effects our immune system. Our immune system keeps us healthy.
The segment of DNA that is being transcribed (in this video) is the....
A. dark part
B. both sections
C. light part
Answer:
C. light part
Explanation:
In transcription, a region of DNA opens up. One strand, the template strand, serves as a template for synthesis of a complementary RNA transcript. The other strand, the coding strand, is identical to the RNA transcript in sequence, except that it has uracil (U) bases in place of thymine (T) bases.
Answer:
B. both sections
Explanation:
in essential biology
Do you think if the environmental conditions in an area changes that the plants and animals that inhabit that region will change their features to adapt to the changing conditions?
Answer:
yea
Explanation:
cause our climate conditions changes everyday depends on the atmosphere at that time so if there fire in a forest all the animals there have to adapt to the smoke.
Yes, if the environmental conditions in an area changes that the plants and animals that inhabit that region will change their features to adapt to the changing conditions.
Why plants and animals will change their features?
Plants and animals are fundamentally different in many ways, but one of the most obvious is in how they deal with temperature.The climatic niche of a species reflects where it can live.A species with a wide climatic niche can range widely across many different conditions and may be especially resilient to climate change.Different sets of plant and animal species tend to occur at different elevations, which differ in temperature and precipitation.
Learn more about adaptations below,
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What process is not used to maintain homeostasis within cells
A. Diffusion
B. Osmosis
C. Dialysis
D. Active Transport
Answer: D
Explanation:cells cannot change their external environment to maintain homeostasis. They communicate with other cells via cell signaling, they take up nutrients for sustainability and growth, cells also breakdown unwanted molecules as a way of waste management.
What is a photosystem?
Answer:
Photosystems are functional and structural units of protein complexes involved in photosynthesis. Together they carry out the primary photochemistry of photosynthesis: the absorption of light and the transfer of energy and electrons.
Explanation:
i tink this is helpful dor you
what is the part of endoplasmic reticulum without proteins attached?
Answer:
Regions of ER that lack bound ribosomes are called smooth endoplasmic reticulum, or smooth ER.
Answer:
The ER regions lacking bonded ribosomes are referred to as the smooth or smooth endoplasmic reticulum.
Explanation:
The Endoplasmic reticulum is a membrane network within the cell that transmits proteins and other molecules. Proteins called ribosomes are assembled at organelles. The ribosomes that are assembled to the endoplasmic reticulum give it a rough look when proteins are intended for cell membrane or export from the cells. Smooth endoplasmic ribosomes are absent and help to synthesize and concentrate various cell-required substances.
Either a smooth or rough endoplasmic reticulum is capable of producing protein in general for the rest of the cell to function. The raw endoplasmic reticulum contains ribosomes, small, red organelles that make these proteins. Sometimes the proteins remain inside the endoplasmic reticulum when made incorrectly.
It is retained and the endoplasmic reticulum is engulfed because it appears to be stuck in a way that does not lead the protein where it is supposed to go. There is also the smooth endoplasmic reticulum on which these ribosomes are not contained. This smooth endoplasmic reticulum produces other materials that the cell needs. The endoplasmic reticulum is an organelle that actually produces proteins and substances that are necessary for the rest of the cell.
Questions are in the attachments I’ll give a brainlist
menstruation
it is the shedding of endometrium layer of uterus in females
it is a cycle of 28 days and menstruation occurs in first 5 days of cycle
if female is pregnant then there ia no menstruation
Answer:
mensturation
Explanation:
if the unfertilized egg pass out of the female body then mensturation occurs but if the egg fertilized with the men's sperm the fertilized egg travels through the fallopian tube to implant itself into the uterus.And finally women is considered pregnant.
What statement is not apart of the cell theory
PLEASE HELP WILL MARK BRANLIEST!
Fungi and bacteria are examples of _____:
A. decomposers, B. producers, C. consumers, D. demagorgans
Answer:A. decomposers
Explanation: A decomposer is an organism that decomposes, or breaks down, organic material such as the remains of dead organisms. Decomposers include bacteria and fungi. These organisms carry out the process of decomposition, which all living organisms undergo after death.
What are the names of the pigments that are in a plant’s leaves? (Choose all that apply)
flavonoids
anthocyanins
carotenoids
chlorophyll
Answer:
All of these pigments are found in leaves
Answer:
anthocyanins
carotenoids
chlorophyll
Explanation:
Its all except flavonoids
A construction company wants to trap pollutants in runoff at its sites. What should the company do?
O A.
Practice conservation tillage at the sites.
O B. Release beneficial insects,
such as spiders and ladybugs, at the sites.
O C. Plant grass and
lay straw at the sites.
O D. Plant trees at the sites.
Answer:
O C. Plant grass and lay straw at the sites.
Explanation:
Plant grass and lay straw at the sites are used by the company to trap pollutants at its sites because these plants reduce the runoff by absorbing most of the water and by absorbing water we can trap the pollutants present in that water. By trapping this industrial water, we can reduce water pollution that occurs due to this industrial waste and pollutants so planting grass and lay straw is the best way to trap pollutant.
Humanity faces a great number of environmental challenges, including: resource depletion, ecosystem service deterioration, pollution, biodiversity loss and climate change. Technology and research have both had positive and negative effects on the environment. Evaluate the impact of scientific research and technology on the environment. What are some ways that scientific research has harmed the environment. Choose ALL that apply. A) Research has led to the depletion of natural resources. Eliminate B) Air, water, heat and noise pollution can all be caused by producing and using technology. C) Scientific research has led to widespread increases in carbon emissions which has led to global climate change. D) Scientific research has caused widespread habitat disturbance and destruction as scientists have invaded ecosystems. E) Manufacturing technology creates large amounts of waste, and used computers and electronics get thrown out when they break or become outdated.
Answer:
Option B and E and D
Explanation:
Technological advancement has led to growth of industries and manufacturing units and hence the net production of goods. This has led to the use of natural resources and release of pollution of all forms. Environmental research leads to intrusion into niche habitats and hence causes its destruction.
Option B, D and E are correct
Fungi help maintain ecosystem health and equilibrium. What is their role in ecosystems?
a. producers, resulting in the release of oxygen into the environment
b. decomposers, resulting in the recycling of nutrients
c. producers, resulting in the production of energy-rich food for consumers
d. consumers, resulting in the removal of nitrogen from the soil
please take it seriously
Answer:
Explanation:
The answer is b decomposers, resulting in the recycling of nutrients
Which of the following does NOT contribute to sea level rise?
O Melting of glacial ice sheets on Iceland and Antarctica
O Melting of mountain glaciers
O Melting of sea ice in the Arctic Ocean
O Expansion of ocean water as it warms
Answer:
D is the correct option
Explanation:
expansion of water is not significant over day night temperature
¿ Como recuperarías la Dieta Prehispánica y las tradiciones alimentarias que nos heredaron nuestros antepasados?
Answer:
A través de la literatura,
Explicación:
Recuperaríamos la Dieta Prehispánica y las tradiciones alimentarias que nuestros antepasados nos heredaron a través del estudio de su escritura sobre el plano de la dieta y los alimentos que consumen. Al adoptar la Dieta Prehispánica, podemos mejorar nuestra salud y recuperar nuestras tradiciones. También obtenemos tradiciones alimentarias que estuvieron presentes en la Dieta Prehispánica debido a la literatura escrita por las personas presentes en ese momento por lo que los documentos escritos ayudan a recuperar la Dieta Prehispánica y las tradiciones alimentarias.
PLEASE HELP! WILL MARK BRANLIEST!
The amount of carbon today is the exact amount that has always been on Earth. T or F
(Easy question)
What is an Adaptation?
Answer:
The way something changes to fit its natural environment or surroundings to have a better chance at success for anything
Explanation:
Why do you think that dilating blood vessels will decrease temperature of the blood as well as decrease blood pressure?
What's true about all three of the first babies?
A. They all have hair, but they have different genotypes
B. They all have the same genes but some have hair and some don't
Answer:
B. They all have the same genes but some have hair and some don't
Explanation:
Type I genes tend to be involved in immune response or sensory receptors while type III genes are involved in cell to cell signalling and type II genes are a complex mix of all three types.
Answer:
B. They all have the same genes but some have hair and some don't
Explanation:
The statement (B) is correct statement.
write any three write any three basis of evolution of living beings on the earth
Answer:
Hadean, archean, proterozoic
What are the phenotypes of an organism?
A. the organism's genes
B. the organism's physical traits
B. the organism's physical traits
hope it is helpful to you ☺️
I believe the answer to this is:
B. The organism's physical traits
Hope this helps! :D
what do fossil remains of eariler animals indicate about changes in the animals habitats over time?