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RUDIKE [14]
3 years ago
12

A cell is a complex system. like most systems, a cell contains a boundary that separates things that are inside the system from

those that are outside of the system. which part of the cell functions as a system boundary?
a.cytoplasm
b.membrane
c.nucleus
d.ribosome
Biology
2 answers:
Dimas [21]3 years ago
4 0
I’m pretty sure it’s b, the membrane, wich is the exterior layer of the cell!
Sloan [31]3 years ago
3 0

The membrane of a cell forms a boundary that separates the cell from the outside world. This boundary allows the system to maintain the order and organization necessary for life

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Humans and baboon have noses with nostrils that face downward, but many other primates have noses with nostrils that face out to
Zepler [3.9K]

Answer:

a shared derived trait.

Explanation:

Genetics can be defined as the scientific study of hereditary in living organisms such as humans, animals and plants.

Simply stated, a trait refers to the specific features or characteristics possessed by a living organism. It is essentially transferred from the parent of a living organism to her offspring and as such distinguishes him or her.

Heredity refers to the transfer of traits (specific characteristics) from the parent of a living organism to her offspring through sexual reproduction or asexual production. Some examples of hereditary traits are dimples, tongue rolling, baldness, weight, handedness, freckles, curly hair, hair color, blindness, complexion, height, etc.

All humans and baboons are created having noses with nostrils underneath i.e facing downwards but other primates such as platyrrhines have their nostrils facing sideways (face out to the side). Also, humans and baboons shared close similarities with each other when compared than they share with the primates having a outward-facing nostrils.

This ultimately implies that, both humans and baboons sharing the downward-facing nostril orientation is an example of a shared derived trait.

A shared derived trait can be defined as a trait or characteristic that is shared between two lineages and subsequently evolves leading up to a clade, which is a distinguishing feature from other species.

4 0
2 years ago
Question 30(Multiple Choice Worth 2 points) [OU.04]One meteorologist believes that global warming has caused a significant chang
Nina [5.8K]
I believe the answer is: Different scientists use different data for investigation.
I say that because different scientists have different equipment, ideas, and have different methods. I hope I was right and i hope it helped and i wasn't to late to answer this question.
4 0
2 years ago
Read 2 more answers
A mixture of oxygen, hydrogen, and nitrogen exerts a total pressure of 378 kPa. If the partial pressures of oxygen and hydrogen
NARA [144]

As we know that

<span>P total = pO +pH +pN</span>

<span>so</span>

P = P1 + P2 + P3

378 kPa= 212 kPa + 101 kPa + P(H2)

P(H2) = 65 kPa

partial pressure is 65

so correct option is A 

hope it helps

4 0
3 years ago
Read 2 more answers
Suppose the two tryptophan codons within the leader peptide of the trp operon were changed from tryptophan to asparagine. Predic
Kaylis [27]

Answer:B

Explanation:

6 0
3 years ago
An element has a half-life of 30 years. If 20 mg of this element decays over a period of 90 years, how many mg of this element w
Vlada [557]

Answer:

2.5 mg

Explanation:

<em>The half-life of a substance is the time required for one half of the substance to decay. In order words, it is the time it will take for a substance to decay into  half of its initial size.</em>

For a 20 mg element with a half-life of 30 which decays over a period of 90 years;

The first 30 years, 10 mg would have decayed, remaining 10 mg

The second 30 years, the remaining 10 mg would have decayed to 5 mg

The third 30 years, 5mg would have decayed to 2.5 mg.

Hence, in 90 years, 20 mg of the element would <u>remain only 2.5 mg.</u>

7 0
2 years ago
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