life sciences

What are 4 things all organisms need

Water, nutrients, space to live, and air(02 or co2)

Why do organisms need water

It helps carry out cellular activities, such as DNA replication, cell division, protein synthesis, and the transports of nutrients and waste

Autotroph

Producers who make their own food, like plants

Heterotrophs

Consumers must consume external sources of nutrients ( carnivores, herbivores)

Why do organisms need space to live

It provides access to food, water, and shelter. Organisms often compete for this space

What are the roles of o2 and co2

Plants need carbon dioxide for photosynthesis and both plants and animals need oxygen for cellular respiration to create energy

8 characteristics of living things

Cells, Homeostasis, Energy, Reproduce, Traits (pass on), Grow, Respond (to environment), Change (evolve)./

/ cats hate every rat. they hunt,growl,chase

Cells

All organisms are made of cells. They can be unicellular (single-celled, like bacteria) or multicellular (complex, made of many cells).

Homeostasis

The ability to maintain stable internal conditions in response to environmental changes (e.g., humans sweating to cool off or shivering to stay warm).

How do organisms use energy

Cells use an energy currency called ATP (Adenosine triphosphate) to power daily functions and the repair or replacement of damaged cells.

Difference between sexual and asexual reproduction

Sexual reproduction requires 2 parents to produce offspring with different genes. Asexual reproduction involves a single parent producing a genetically identical offspring (a clone).

How are traits passed to offspring

Traits are passed through genes found in DNA

How do organisms respond to stimulus

They respond by taking action interna or external

Change

Populations change over time through natural selection. Traits best suited for the environment survive and are passed on