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Sophie [7]
3 years ago
15

A teacher says she has identified an organism with these characteristics: eukaryotic, multicellular, autotrophic, and a cell wal

l made of cellulose. Which kingdom is the teacher describing?
Biology
1 answer:
Alex73 [517]3 years ago
6 0
Plantae cell (option C)
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Which of the following is a correct statement about sugar movemetn in phloem?
Simora [160]

Answer:

a. movement can occur both upward and downward in the plant

Explanation:

The phloem loading causes the accumulation of sugars in the sieved elements generating a negative solute potential (quedas), with a drop in water potential (ψw), so water enters the sieved elements increasing the turgor pressure (ψp). With the discharge of phloem in the drain occurs lower concentration of sugars in the screened elements, increases the solute potential, becoming positive, thus the phloem water potential increases and thus the water leaves the conducting vessel. In the specific case of sugar movement in the phloem, it can be stated that this movement can occur both up and down in the plant.

7 0
3 years ago
What happens to trna molecules after they deliver their amino acid to the ribosome?
WINSTONCH [101]
Protein is then made.
7 0
3 years ago
Which of the following correctly describes the result of genetic mutations when they occur in a body cell?
Vlad1618 [11]
The answer is c.the individual will have an extar chromosome resulting from non-disjunction

6 0
3 years ago
Read 2 more answers
When a living organism dies, it stops taking in new carbon. Thus, as the radioactive carbon-14 decays, the ratio of carbon-12 to
Alexxandr [17]

Answer: The fossil is 11459 years old.

Explanation:

Half-life of carbon-14 = 5700 years

First we have to calculate the rate constant, we use the formula :

k=\frac{0.693}{5700\text{years}}

k=1.21\times 10^{-4}\text{years}^{-1}

Now we have to calculate the age of the sample:

Expression for rate law for first order kinetics is given by:

t=\frac{2.303}{k}\log\frac{a}{a-x}

where,

k = rate constant  = 1.21\times 10^{-4}\text{years}^{-1}
t = age of sample  = ?
a = let initial amount of the reactant  = 100 g
x = amount decayed = 75 g
a - x = amount left after decay process  = 100 - 75 = 25 g  Now put all the given values in above equation, we get
[tex]t==\frac{2.303}{1.21\times 10^{-4}}\log\frac{100}{25}

t=11459years

The fossil is 11459 years old.

4 0
3 years ago
What kind of variation is exhibited by human bloods?
kotykmax [81]

<span>Blood provides an ideal opportunity for the study of human variation without cultural prejudice.  It can be easily classified for many different genetically inherited blood typing systems.  Also significant is the fact that we rarely take blood types into consideration in selecting mates.  In addition, few people know their own type today and no one did prior to 1900.  As a result, differences in blood type frequencies around the world are most likely due to other factors than social discrimination.  Contemporary Japan is somewhat of an exception since there are popular Japanese stereotypes about people with different blood types.  This could affect choice in marriage partners for some Japanese. </span>All human populations share the same 29 known blood systems, although they differ in the frequencies of specific types.  Given the evolutionary closeness of apes and monkeys to our species, it is not surprising that some of them share a number of blood typing systems with us as well. When we donate blood or have surgery, a small sample is usually taken in advance for at least ABO  and Rh  systems typing.  If you are O+, the O is your ABO type and the + is your Rh type.  It is possible to be A, B, AB, or O as well as Rh+  or Rh- You inherited your blood types from your parents and the environment in which you live cannot change them. I took it from a website: http://anthro.palomar.edu/vary/vary_3.htm

4 0
3 years ago
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