Answer:
A) missing one X chromosome
B) XXY
C) extra 21 chromosome
D) all relevant number of chromosomes
Explanation:
A) See attachment 1
B) see 2nd attachment
C) see 3rd attachment
D) see 4th attachment
<span>- they both deal with molecules that travel down/with a concentration gradient without using energy
- facilitated diffusion uses protein transporters to move substances across a membrane
- the process of simple diffusion occurs only in prokaryotes while facilitated diffusion is seen only in eukaryotes
- simple diffusion doesn't require energy, but facilitated diffusion requires a source of ATP
- simple diffusion can only move material in the direction of a concentration gradient, while facilitated diffusion moves materials with and against a concentration gradient</span>
Answer: died
Explanation: Simon was dead, and Jack had died. 'Was' is a past continuous tense word showing an action that had been performed moments, seconds, minutes or even years ago, and that action or event will continue to be in the past. 'Had' on the other hand is showing an event that just occured recently. Simon might have died 2 days ago and Jack's death might have come seconds ago.
In any habitat, a keystone species is one that has a major impact on that ecosystem. If that creature were removed, the changes would be nearly immediate and extremely noticeable. Both predators and prey can be keystone species, and are key to maintaining ecological balance.
:333
Transcription occurs in the nucleus. ( in a eukaryotic cell )
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