A group of organs would be an organ system so perhaps B
Answer:
There are 22 numbered pairs of chromosomes called autosomes. The 23rd pair of chromosomes are the sex chromosomes. They determine an individual's sex. Females have two X chromosomes, and males have an X and a Y chromosome.
This is how you know if a karyotype is male or female?
Wild animals always show preference for mates. Its part of the continous cycle of producing survivals and offspring. Even plants do it in their own way. Hope i was hhelpful?
The greenhouse effect is the natural warming of Earth's lower atmosphere and surface.
<u>Explanation:</u>
The idea of climate and temperature around the Earth begins with the sun. Approximately 30% of the sunlight reflects back to the cloud and ice from the surface.
The basic rise of the greenhouse effect is when the sun radiates around the earth.The greenhouse effect is the natural warming of Earth's lower atmosphere and surface. The 30% reflects back where the rest of the energy of the sun is collected by greenhouse effect and radiated to the surface again.
The radiation as well as the absorption of the heat is beneficial to the lower atmosphere as well as the surface as no other foundation can be reflected and radiated by the greenhouse effect.
The gradient of streams tends to be steeper in their upper reaches and gentler in their lower reaches<span>.</span>
