Answer:
To allow certain things and out of cell and provide protection for the interior.
Explanation:
According to cell theory , blood contains cells .
Planet with 1/2 the gravitational force as the earth. the effect of the mass and weight of the space probe is described below.
Explanation:
- At an altitude of 2642 km (approx. 1641 miles) above the Earth's surface, the gravitational acceleration will be 4.89m/s^2, which is half of 9.78 m/s^2 (the gravity at the surface).
- When the distance between the 2 objects is halved, the gravitational force between the 2 objects is doubled. when the distance between the 2 objects is doubled then the gravitational force doubles.
- Yes, a space probe that weighs 1000 pounds (excluding fuel) sitting in its launch vehicle on the launch pad will weigh much more from launch until the rocket's engines shut off. At that point it will become weightless. It becomes weightless because it's in free fall, even though it is still heading away from the Earth.
- In space without gravity pulling down on them, Astronauts are essentially weightless. It is important to explore the difference between mass and weight. ... However, if we went from Earth to Mars, our weight would change because Mars has less gravity than Earth. Gravity is a force pulling matter together.
Answer:
Option B and D are correct as the Carbon dioxide levels in the Earth’s atmosphere have been steadily increasing and other greenhouse gases amplify the effect of carbon dioxide.
Explanation:
As we all are aware that increasing rate of carbon dioxide is responsible for global warming. Scientists note that the average temperature on Earth is increasing over time. They believe that a contributing factor is the greenhouse effect.
This effect is caused by the formation of greenhouse gases, such as methane, water vapor, and carbon dioxide. Increasing the amount of greenhouse gases in the atmosphere is considered to be the cause of global warming and climate change. Water vapor, carbon dioxide, methane, nitrous oxide and ozone are main green house gases.
Answer:
A) series of events that cells go through as they grow and divide
Explanation:
Cell cycle refers to the sequential events which take place during the division of one parent cell to daughter cells.
Since the cell divides continuously in the multicellular organism therefore these events are repeated over and over again that is the same steps are repeated a thus is known as cyclic events.
The cell cycle takes place into two phases: the interphase during which the cell prepares itself for nuclear division and the karyokinesis during which the nucleus divides.
Thus, Option-A is correct.