Answer:
- Invertebrates may have an <u>exoskeleton</u> for protection and support.
- Vertebrates have a backbone and a skull.
Explanation:
Invertebrates are usually small animals, they usually lack of an articulated internal skeleton, although some do, but it is an external skeleton called an exoskeleton. Many have shells, shells, or covers of some hard substance.
A vertebrate is an animal that has a skeleton with a vertebral column and a skull, and whose central nervous system is made up of the spinal cord and the brain.
Hi!
14. Star clusters are held together by gravity. It really depends how old a star in the cluster is - it could be just born, or could have been born hundreds of billions of years ago. Astronomers categorize them by different colors, temperatures, sizes, brightness, etc.
15. Open clusters eventually disperse to form field stars.
16. Our sun is not part of a cluster (although it used to be).
17. Globular clusters<span> </span>are<span> found in the ring of a galaxy and usually contain more stars and </span>are<span> much older than the </span>open clusters.
18. Omega Centuari and M13.
Hope this helps!
The answer is D. Permafrost because it is a non living (abiotic) factor.
The symbol C represents Carbon.
CaCO₃ ⇒ CaO + CO₂
Calcium carbonate is a compound which comprises of elements such as :
<h3>Compound</h3>
This is formed from the combination of two or more elements in a chemical
reaction. In this scenario, the elements are combined in varying proportions
to form the compound.
Carbon is an elements which is denoted with the symbol C which makes it
the appropriate choice.
Read more about Compound here brainly.com/question/7849874
Sexual reproduction plays an important role in variation such that; production of unique gametes during meiosis, and the random combination of male and female gametes upon fertilization provides a large amount of variation (option A).
<h3>What is sexual reproduction?</h3>
Sexual reproduction is the process whereby a new organism is created by combining the genetic material of two organisms.
During sexual reproduction, organisms produce gametes through a process called meiosis.
This meiosis allows genetic diversity in the unique gametes produced, which causes random combination of male and female gametes upon fertilization provides a large amount of variation.
Learn more about sexual reproduction at: brainly.com/question/7464705
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