Answer:
It is C
Explanation:
Because everything's starts out small and they are the smallest in the eras because one cell turns to two cells and etc. it was the beginning of all life forms . It couldn't be dinosaurs because they were in the Mesozoic era. At the time of the Precambrian era i think it was before the Phanerozoic eon
The cell membrane controls the movement of substances in and out of cells and organelles. In this way, it is selectively permeable to ions and organic molecules.
The cell membrane maintains the cell's health by forming a barrier that controls which materials can enter or exit, changing shape when necessary, and enabling cell recognition.
The cell membrane, also known as the plasma membrane, plays a crucial role in maintaining the health of a cell. It serves as a barrier, separating the inside of the cell from its external environment and regulating which materials can enter or exit the cell. It is built from a phospholipid bilayer, with the hydrophobic internal lipid 'tails' and hydrophilic external phosphate 'heads'.
This cell membrane is selectively permeable, meaning it allows certain substances to pass through while keeping others out. It achieves this via different transport mechanisms, including passive (non-energy requiring) and active (energy-requiring), depending on the material. It's also flexible to allow changes in the cell's shape, particularly important in the case of red and white blood cells.
Another critical function is the handling of cell recognition. The outer surface of the membrane carries markers for this cause, essential in forming tissues and organs during development and later distinguishing 'self' from 'non-self' in the immune response.
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graphite
limestone
halite
zircon
Answer:
1.)zircon
2.)limestone
3.) clay
Explanation:
*i just did the assignment if i'm wrong sorry in advance :) hopes this helps though*
:D
(E2020)
Answer:
Genes on chromosomes
Explanation:
It has been conclusively established that chromosomes contain the hereditary material or factors that are transmitted from parent to offspring. These factors are called genes. A gene is a short portion of a DNA molecule and is chemical in nature. A gene codes for a specific protein by specifying the order in which the amino acids are linked together.
Answer:
Explanation:
carrying capacity is how many of a certain organism an ecosystem can hold, limiting factors are things that can limit a population's growth. So for example say there's a forest and it has a low amount of food for deer. Food availability would be a limiting factor and it effects how many deer the forest can support.
The carrying capacity of an ecosystem is its maximum sustainable population size. When this limit is exceeded, resource competition can result in population decrease.
The carrying capacity of an ecosystem is the maximum number of individuals of a particular species that the environment can support indefinitely, given the available resources like food, water, and space. When the population exceeds the carrying capacity, resources become scarce leading to competition.
As a result, some individuals may fail to survive or reproduce, thus causing the population to decrease in size.
For example, consider a herd of deer in a forest. If food and water supply becomes limited due to their growing numbers and overconsumption, some deer might not get enough food and may consequently die of starvation, thus reducing the population number.
This phenomenon embodies the concept of population dynamics, a key aspect in studying ecosystems and biodiversity.
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