Answer:
How invisible particles can be observed in outer space. ... We call this invisible mass dark matter since it cannot reflect light. Gravitational effects are only way we can detect its presence.
Answer:study with a group
Explanation:Anxiety is an emotion characterized by feelings of tension, worried thoughts and physical changes like increased blood pressure. ... They may avoid certain situations out of worry. They may also have physical symptoms such as sweating, trembling, dizziness or a rapid heartbeat.
What causes anxiety are:
A big event or a buildup of smaller stressful life situations may trigger excessive anxiety — for example, a death in the family, work stress or ongoing worry about finances. Personality. People with certain personality types are more prone to anxiety disorders than others are. Other mental health disorders.
Answer:
haploid describes a cell that contains a single set of chromosomes in gametes (egg or sperm cells). they contain half of the amount of chromosomes as diploid cells, which are also known as somatic cells
From what I remember, China was ruled by a series of emperors
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