B. elements
C. mixtures
D. substances
A beaver marks it territory with its scent.
B.
An egret has long legs for wading in the mud.
C.
A hummingbird has a long bill to reach the flower's nectar.
D.
An arctic fox has thick fur on its feet for warmth.
A. The Constitution should protect the basic rights of the people and the powers of the states.
Chromatin is the lose form of genetic material & the "normal state" of DNA, RNA, and protein in the nucleus and in the cells.
Chromosomes are a condensed form of chromatin. Chromatin becomes chromosomes in the Prophase of Mitosis and Prophase 1 and Prophase 2 of Meiosis. It loosens again in the Telophase in Mitosis and Telophase 1 and Telophase 2 in Meiosis.
Sister Chromatids are made when chromosomes replicate during the cell cycle. The replication leads to the formation of the chromatids. The chromatids are joined by a single centromere. They separate during Anaphase 2 of meiosis.
I hope that this helps! Sorry if it doesn't I tried my best to explain!
All of the living and nonliving things that interact in a particular area make up a ecosystem.
Living things are defined as which are made up of a cell. They form and use energy to survive. A special ability to reproduce, grow, metabolize, able to respond to stimuli, adapt to the environment, move and able to respire.
For example, relationship between lion and sheep in the ecosystem for its survival, the lion prey the sheep. And each relationship in the ecosystem has an effect on other creatures and plants living in the same area.
For more information regarding ecosystem, visit:
#SPJ2
Answer:
all of the living and non-living things in a particular area: ecosystem
the total variety of organisms that live in the biosphere: biodiversity
a group of organisms that breed and produce offspring that can breed: species
all of the living things in a particular area: community
Explanation: