Answer:
There is an accumulation of genetic mutations in the DNA of sperms due to its constant mitosis.
Explanation:
The germinative cells that will become sperms are under constant mitosis. During this process, DNA mutations can happen and be transmitted from one generation of cells to the other as the years go by, and more cell divisions take place, more mutations the DNA in the sperm will have. When the number of mutations reaches a certain level, his child will express these mutations and have autism.
The egg of the mother is not a factor because the germinative cells in women are not under constant mitosis, so there is not an accumulation of gene mutations. Women are born with an exact number of eggs for all their life.
Why is it important to understand both physics and chemistry when studying living things?
answer: both aspects , sameness &variety are the result of biological evolution.
Describe the type and ratio of organisms you would expect to find in a lake in a national park. give evidence to support your answer
Answer:
Algae would be the organism in greatest proportion in a lake in a national park.
Explanation:
A lake in a national park would have algae proliferation, which would be the largest organism in that lake. This is because a lake in a national park is subjected to great incidence of sunlight and large amounts of oxygen. This would facilitate and stimulate the reproduction of algae on a large scale, causing them to develop in the substrate, stones, pebbles, and in the water itself.
which is flatworms locomotory organ tell the answer in full sentence
Answer:
Movement in some flatworms is controlled by longitudinal, circular, and oblique layers of muscle
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5 On his voyage on the HMS Beagle, Darwin saw fossils of giant sloths whose bones resembled bones of living sloths, but were much larger in size. Darwin hypothesized that the fossil sloths were related to sloths alive today. This hypothesis was based on (1 Point)
Answer:
A: observation and inferences
and on this one I am 100% sure it is right
Explanation:
name the blood vessels that convey blood to the brain
Answer:
Blood is supplied to the brain, face, and scalp via two major sets of vessels: the right and left common carotid arteries and the right and left vertebral arteries. The common carotid arteries have two divisions. The external carotid arteries supply the face and scalp with blood.
Explanation:
1. Which structure is not part of the endomembrane system?
(A) nuclear envelope
(C) Golgi apparatus
(B) chloroplast
(D) plasma membrane
The structure that is not a part of endomembrane system is chloroplast. The correct option is B.
What is endomembrane system?The endomembrane system is a membranous component system. The membranes of the nucleus, the endoplasmic reticulum, the Golgi apparatus, lysosomes, endosomes, vesicles, and the plasma membrane are all part of it. It doesn't include mitochondrial chloroplast membranes.
The endomembrane system is a network of membranes in the cell that serve to reconfigure, transfer, and bundle proteins and lipids.
The endomembrane system is a collection of eukaryotic biological membranes and organelles that work with each other to modify, package, and transport lipids and proteins.
Thus, the correct option is B.
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A farmer in Minnesota plants some tomato seeds in early spring. She plants them outdoors in soil and adds water every day. A few weeks later, nothing has happened. What is the most likely reason the seeds have not germinated?
Answer:
Other factors could affect the reason the seed didn't germinate because under suitable conditions depending on the variety it should germinate within 5 to 10 days from planting. However, the most likely reason it didn't germinate must be the Temperature.
Explanation:
From the question above, the farmer lives in Minnesota and she planted between March and May, meaning the temperature was way cold which is not suitable for tomato. One other valuable point was she planting outdoor which could also affect the performance of the tomato seedlings. Planting in early spring doesn't necessarily mean bad as some seeds might thrive under conditions explained above. For tomato, depending on temperature because too high temperatures could also affect the viability of the seeds. In Minnesota in early spring, it would have been better if she planted indoors to raise the temperature before transplanting as a balanced night temperature is also important for the seed viability.
Some other factors to be considered for seeds to germinate:
1. Water
2. Type of the soil
3. Seed depth in the soil
4. Nature of seed coat
5. Oxygen
6. Light
Help due tomorrow!!!
PLEASE HELP I NEED THIS ASAP!!!!!!!!!!!!!!!!!!!!!!A leaf's stomata____. A. contain chlorophyll B. protect the leaf from physical damage C. open and close to control evaporation D. are part of the spongy layer
Answer:
C. open and close to control evaporation
All fish nitrogen into the water as ammonia and organic nitrogen. These chemicals are byproducts of their metabolism and respiration.
Answer:
The correct answer would be - release/excretes.
Explanation:
In ponds, rivers, or similar ecosystem nitrogen cycle is completed with the help of the fishes. In this ecosystem, the nitrogen cycle initiates with the eating plants or fish food by the fishes and performs metabolism and cellular respiration which produces byproduct ammonia and organic nitrogen as animal waste.
This waste is released or excreted by the fish in the water where the beneficial bacterium helps in restoring nitrogen back to the atmosphere by breaking these wastes.
Which of the following is not true about Darwin’s book On the Origin of Species?
a.
He worked on the manuscript for three years.
b.
It was successful.
c.
It explained his theory of evolution.
d.
It was based on his findings in South Africa.
Answer:
The correct answer is option D. It was based on his findings in South Africa.
Explanation:
The theory of natural selection was first planned in Darwin's book "On the Origin of Species" in 1859, which is the process by which life forms change after some time because of changes in heritable physical or behavioral qualities.
His book On the Origin of Species took three years time to complete as he worked on the manuscript for three years. It was successful book. However, it was not based on his work on africa.
Answer:
it's d
Explanation: just took the test
At which stage of development does the embryo implant in the uterus?
Answer:
Blastocyst stage
Explanation:
A baby undergoes different stages of development before they become fully matured. It all begins with the process of fertilization which involves a sperm cell coming in contact with an egg.
After a successful fertilization, the fertilized egg travels down to the uterus where it undergoes series of cell division till it becomes a stack of arranged cells known as the blastocyst.
During the blastocyst stage, the embryo fastens itself to the edge of the uterus, this process is known as implantation.
Hence, the embryo implants in the uterus during the blastocyst stage.
Students in a science class were asked to investigate how missing or damaged
organelles affect cellular homeostasis for cells found in muscle tissues.
Which of the following questions should they ask to determine if these muscle cells
are functioning properly? (AKS 151)
At what rate do the chloroplasts of the cell need to capture enough sunlight to
meet the high energy needs of the cell?
At what rate do the ribosomes of the cell need to work to produce enough
glucose to meet the high energy needs of the cell?
At what rate do the mitochondria of the cell need to convert glucose to usable
energy molecules to meet the high energy needs of the cell?
At what rate does the cell wall need to break down its carbohydrate structure to
meet the high energy needs of the cell?
Answer:
At what rate do the mitochondria of the cell need to convert glucose to usable
energy molecules to meet the high energy needs of the cell?
Explanation:
Organelles are organ-like structures found in cells. The are responsible for the specific actions carried out by each cell. Each organelle has its own specific role to play. However, missing or damaged organelles can have effects on the cells.
Mitochondria are organelles found in cells of all eukaryotic living organisms e.g animal, plants as they are responsible for the synthesis of energy in form of ATP. Since the cells being investigated in this question is a MUSCLE CELL, which is only found in animals, then an appropriate organelle must be investigated.
The appropriate to be asked to know if muscles cells are functioning properly is: At what rate do the mitochondria of the cell need to convert glucose to usable energy molecules to meet the high energy needs of the cell?.
Note that, other options are incorrect because muscle cells do not have chloroplast and cell wall, while ribosomes are not site for glucose production.
When NaCl is added to water, its bond will break. If C6H12O6 (glucose) is added to water, its bonds will not break.
True
False
Answer:
False.
Explanation:
The bonds become so strong that they make the glucose molecules separate.
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What exercise is most appropriate for testing muscular endurance?
A. Push-up
B. Bench press
C. Back squat
D. Bicep curl
Answer:
Push ups
Explanation:
Muscular endurance is when the muscle have the ability to withstand and sustain contractions that is constantly occur for a long period of time. It include the amount of repeated single exercise that the muscle can endure without resting. It ensures muscular fitness, muscular strength and power.
A good example of muscular exercise is push up the ability to constantly do it for a long time without rest or stopping.
The push-up is the most appropriate exercise for testing muscular endurance. Therefore, the correct option is A.
Muscular endurance is the ability of a muscle or group of muscles to sustain repeated contractions over a prolonged period of time.
The push-up specifically targets the chest, shoulders, triceps, and core muscles. It requires maintaining a plank position and lowering and raising the body by bending and extending the elbows.
By performing as many push-ups as possible without compromising form, an individual can assess their muscular endurance level.
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20 POINT QUESTION!!! Does CORONAVIUS have all seven characteristics of a living thing? reproduction, ability to react to stimuli, growth & development, can process and use energy, regulation, organization/order, evolutionary adaptions?
no, it doesn't. viruses cannot reproduce without a host.
Write a short paragraph describing the role of all types of lipids
Lipid Biological Functions
-Chemical messengers.
-Storage and provision of energy.
-Maintenance of temperature.
-Membrane lipid layer formation.
-Cholesterol formation.
-Prostaglandin formation and role in inflammation.
Which process connects glycolysis and the citric acid cycle?
A. lactic acid formation
B. acetyl CoA formation
C.electron transport
D. Krebs cycle
Answer: the answer is B
Explanation: i lied lolololloloolollololol
In aquatic ecosystems, phytoplankton and other photosynthetic organisms appear in the upper layer of the water, but not deeper layers. Which statement explains this distribution?
ANSWER :
The deeper layers are too dark for photosynthesis to occur.
Explanation:
Photosynthesis is a unique process to autotophic organisms. It involves the use of light energy from the sun to manufacture organic molecules (food). As the phenomenon implies i.e. PHOTO - LiGHT, light is an unnegotiable requirement for photosynthesis to take place. Autotrophs are able to perform this process because they contain pigments (Chlorophyll) that can trap energy from sunlight.
In an aquatic ecosystem, phytoplanktons and other photosynthetic organisms like aquatic plants are the autotophic organisms. They are found in the upper layer of the water so that they can reach light from the sun. The light from the sun cannot travel deep down the water making the deep parts of the ocean be deprived of light.
This is the reason why photosynthetic organisms cannot be found in the deep parts of the water as they will be unable to have access to the light from the sun in order to perform photosynthesis.
Answer:
the answer is a
Explanation:
Which term names the science of classifying organisms?
Answer:
Taxonomy
Explanation:
It's the science of naming, classification if an organisms.
Which statement explains how determining the age of the remains of living things is similar to dating rocks
Answer:
it is choice a.............................
Explanation:
on test
Answer:
A
Explanation:
Why is it important for scientists who study ecosystems to study more than the organisms that live there?
which of the following is most consistent with the modern theory of evolution
The correct answer is Parents pass their physical traits to their offspring; those offspring with traits that help them survive in their environment are able to reproduce.
Explanation:
The modern theory of evolution explains the mechanisms that make organisms change. One of the main ideas this theory proposes is that organisms with traits that help them survive or reproduce have higher chances to pass their genes and traits to new generations. This mechanism makes certain traits to be favored and contributes to the evolution of organisms because after multiple generations certain traits will prevail while others will be eliminated.
Moreover, this theory specifies genes in an organism are not acquired or modified during its life but these are the results of the traits passed to the organism by its parents and evolution occurs only after a long time or multiple generations. According to this, the first option is the correct one.
I need some help! What cell structure goes to what definition? The structures as well as the descriptions are below.
lysosome
vesicle
nucleus
Golgi apparatus
chloroplast
smooth endoplasmic reticulum
nucleolus
rough endoplasmic reticulum
ribosome
mitochondrion
1.
contains chlorophyll, site of photosynthesis
2.
contains chromosomes, directs cell’s activities
3.
contains hydrolytic enzymes
4.
membranous network that detoxifies and helps synthesize lipids
5.
membranous network that helps synthesize proteins
6.
modifies and stores the products of the ER
7.
site of cellular respiration and ATP production
8.
site of protein synthesis
9.
site of ribosomal RNA synthesis
10.
small membrane-bound sac within a cell
Answer:
1-chloroplast
2-Golgi apparatus.
Explanation:
Enzymes are proteins that act as catalysts. The shape of enzymes can be altered by changes
in pH or temperature. Explain how this change of shape affects the function of the enzyme.
Answer:
Explanation:
Enzymes are proteins that act as catalysts. The shape of enzymes can be altered by changes
in pH or temperature. Explain how this change of shape affects the function of the enzyme.
An organism that has the ability to maintain an internal temperature suitable for life.
ectotherm
endotherm
heterotrophs
species
Answer:
The correct answer is - endotherm.
Explanation:
Homeostasis is the process that is responsible for maintaining the internal body environment including the temperature of an individual in order to survive.
Endothermic organisms are the organism that maintains their body temperature and independent of environmental change where is ectothermic are dependent on the external environment to regulate their body temperature.
Thus, the correct answer is - endotherm.
Answer: Endotherm
Explanation:
Are individual organelles (cell structures) living? Defend your answer.
Answer:
the cell structure is living
Explanation:
CELL! cells are living
how are lipids like carbohydrates
Carbohydrates and lipids are both types of macromolecules found in living things. Carbohydrates are often referred to as sugars and are found in different forms such as glucose and maltose. Lipids are fats, oils, waxes and steroids and are made up of fatty acids.
23. Which of the following explains nitrogen fixation. *
Answer:
Nitrogen fixation is the process by which atmospheric nitrogen is converted by either a nature or an industrial mean to a form of nitrogen such as ammonia.