1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
vekshin1
3 years ago
5

How does the cell cycle start off?

Biology
2 answers:
dimaraw [331]3 years ago
8 0

A new cell arises when one cell divides or when two cells, like a sperm and an egg cell, fuse. Either event sets off a cell-replication program that is encoded in the DNA and executed by proteins.
Stels [109]3 years ago
5 0
Entry to the cycle is made in Gap 1 (G1) phase and this is followed in sequence by a DNA synthesis (S) phase, Gap 2 (G2) phase, and Mitosis (M). After mitosis (M) some cells enter the G1 phase of a new cell cycle whilst others may diverge at the start of G1 into a phase called Gap 0 (zero)
You might be interested in
Cellular respiration is carried out in the presence of oxygen (aerobic conditions) or the absence of oxygen (anaerobic condition
lora16 [44]

thats not a question

4 0
3 years ago
Which describes the light-dependent stage of photosynthesis?
NNADVOKAT [17]

The correct answer is:

A. Photosynthetic pigments absorb energy from light.

|Huntrw6|

8 0
3 years ago
Read 2 more answers
20 POINTS
charle [14.2K]
Cell wall - Adds structural support to the cell. Holds the cells together
Cell membrane - Serves as a barrier to the cell and allows more nutrient and molecules to move in and out of the cell without letting things that can harm the cell in. 
Outer membrane - Serves the same basic functions a the cell membrane. (Depending on how complicated the class your in is, I would visit this website for more information... https://en.wikipedia.org/wiki/Bacterial_outer_membrane )
Pili - Help the cell move and attach the bacteria to surfaces are other cells. 
DNA - Contains the genetic instructions on what the cell can physically do, operate, and reproduce. 
Flagellum - Helps the cell move. It kind of acts like a propeller for the cell so that it can move around. 
8 0
3 years ago
I need help with modeling a carbon cycle, do you mind helping me? :)
madam [21]

Explanation:

The Carbon Cycle

The element carbon is a part of seawater, the atmosphere, rocks such as limestone and coal, soils, as well as all living things. On our dynamic planet, carbon is able to move from one of these realms to another as a part of the carbon cycle.

Carbon moves from the atmosphere to plants. In the atmosphere, carbon is attached to oxygen in a gas called carbon dioxide (CO2). Through the process of photosynthesis, carbon dioxide is pulled from the air to produce food made from carbon for plant growth.

Carbon moves from plants to animals. Through food chains, the carbon that is in plants moves to the animals that eat them. Animals that eat other animals get the carbon from their food too.

Carbon moves from plants and animals to soils. When plants and animals die, their bodies, wood and leaves decays bringing the carbon into the ground. Some is buried and will become fossil fuels in millions and millions of years.

Carbon moves from living things to the atmosphere. Each time you exhale, you are releasing carbon dioxide gas (CO2) into the atmosphere. Animals and plants need to get rid of carbon dioxide gas through a process called respiration.

Carbon moves from fossil fuels to the atmosphere when fuels are burned. When humans burn fossil fuels to power factories, power plants, cars and trucks, most of the carbon quickly enters the atmosphere as carbon dioxide gas. Each year, five and a half billion tons of carbon is released by burning fossil fuels. Of this massive amount, 3.3 billion tons stays in the atmosphere. Most of the remainder becomes dissolved in seawater.

Carbon moves from the atmosphere to the oceans. The oceans, and other bodies of water, absorb some carbon from the atmosphere. The carbon is dissolved into the water.

Carbon dioxide is a greenhouse gas and traps heat in the atmosphere. Without it and other greenhouse gases, Earth would be a frozen world. But since the start of the Industrial Revolution about 150 years ago humans have burned so much fuel and released so much carbon dioxide into the air that global climate has risen over one degree Fahrenheit. The atmosphere has not held this much carbon for at least 420,000 years according to data from ice cores. The recent increase in amounts of greenhouse gases such as carbon dioxide is having a significant impact on the warming of our planet.

Carbon moves through our planet over longer time scales as well. For example, over millions of years weathering of rocks on land can add carbon to surface water which eventually runs off to the ocean. Over long time scales, carbon is removed from seawater when the shells and bones of marine animals and plankton collect on the sea floor. These shells and bones are made of limestone, which contains carbon. When they are deposited on the sea floor, carbon is stored from the rest of the carbon cycle for some amount of time. The amount of limestone deposited in the ocean depends somewhat on the amount of warm, tropical, shallow oceans on the planet because this is where prolific limestone-producing organisms such as corals live. The carbon can be released back to the atmosphere if the limestone melts or is metamorphosed in a subduction zone.

6 0
3 years ago
22. To test whether a plant grows better in acidic or basic soil, the
KiRa [710]

Answer:

shsydhshsj

Explanation:

xgxhemekdgfndjdvdxgdhhddhdijdjshhgghg ft fjfjjt5njycjf7k n in gjxydjydjydydjydkyjjjjjjjkkooiujjy7v:fď v"dgggfgdjdhdhddhjdhjdjddjjdhddhhffhhdhdjdhdhdhfhdjdjdhddcbxjxbvxbxbdbdbdbxbxvdvdvfvfvfvvvddvdfbbfbbfhbdbdbdbdbdhddhdfuudduuddjudhdfhfhfhfhfhfhfhfhfhfhfhfh hfhfhfhdhdhf hdhdhdhdhddhdh fhhfdhhdhdfhfy ydydydy. yeyeyeyey

8 0
3 years ago
Other questions:
  • The food web above represents feeding relationships in a biological community near a deep-sea hydrothermal vent. Hydrothermal ve
    9·2 answers
  • Zero on a ph scale is very _____, and 14 on a ph scale is very _____. acidic; basic
    6·1 answer
  • 2. Which macromolecules were present in your saliva and food choices? Explain why you think you got the results you did.
    9·2 answers
  • When an object has more negative charge than positive charge the result is called
    9·1 answer
  • Which of the following statements is the most accurate description of the sliding filament mechanism?
    14·1 answer
  • Inside a eukaryotic cell, organelles float in an area called the _____.
    5·2 answers
  • 3. The cerebellum of the human is divided into two portions, while the sheep only has one portion of the cerebellum. Why is ther
    15·2 answers
  • How do human activities lead to primary succession?
    13·1 answer
  • সরিষা এবং কুমড়া গাছে স্বপরাগায়ন কেন হয়?পর পরাগায়ন কেন হয়না?
    6·1 answer
  • I
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!