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Andrej [43]
3 years ago
15

What observation led researchers to purpose that chloroplasts evolved from Cyanobacteria

Biology
2 answers:
ArbitrLikvidat [17]3 years ago
8 0
Considering your talking about the a-d options Here is my answer
<span>A) Both produce proteins.
B) Both contain mitochondria.
C) Both provide structure to cells.
D) Both perform photosynthesis.

Answer is D</span>
devlian [24]3 years ago
8 0
Researchers were led <span>to propose that chloroplasts evolved from cyanobacteria because they observed that both of them perform photosynthesis. </span>
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Consider a population of 425 diploid giant Sequoia trees. In this population, you observe the following genotypic counts: 100 ho
Lemur [1.5K]

Answer:

q = 0.42

Explanation:

This question is an example of Hardy-Weinberg question and there are two equations necessary to carry out this question;

p + q = 1

p² + 2pq + q²  = 1

where;

p = the frequency of the dominant allele

q =  the frequency of the recessive allele

p² = the frequency of individuals with homozygous dominant genotype

2pq  = the frequency of individuals with heterozygous genotype

q² = frequency of individuals with the homozygous recessive genotype

Since the total  population = 425

q² = \frac{individuals with recessive genotype}{Total Population}

= \frac{75}{425}

q² = 0.1765            

To find q; we need to square root both side to           eliminate the square from  q².

∴ \sqrt{q^2}=\sqrt{0.1765}

q = 0.4201

q = 0.42       (to two decimal places)

4 0
3 years ago
What are 3 ways that compounds and mixtures differ
professor190 [17]

Answer:

3 ways to understand the differences between compounds and mixtures are described below in explanation.

Explanation:

1. In a mixture, no new product is formed. It is a simple tacking of two molecules without any chemical reaction occurring. For example water and sand. Compound is a new substance formed by chemical reactions occurring between various molecules. For example, carbon and oxygen combine to form carbon dioxide.

2. A compound is always homogeneous whereas a mixture can be homogeneous or heterogeneous.

3. Compounds have a fixed boiling and melting temperature. Whereas, mixtures do not have a definite melting and boiling temperature.

5 0
3 years ago
Name two types of proteins that regulate the cell cycle. How do these proteins work?
natka813 [3]

Answer:

Internal and external regulators are two types of proteins that regulate the cell cycle. Internal regulators allow the cell cycle to proceed only after certain events occur. External regulators speed up or slow down the cell cycle.

Explanation:

I hope this helps :)

3 0
3 years ago
What part of the cell defines cell shape?
pochemuha
<span>Defines cell shape= </span><span>cytoskeleton

</span>
6 0
3 years ago
During the absorptive state, metabolism adjusts to either provide energy for immediate use or store excess energy to be used lat
Effectus [21]

Answer:

A. Catabolic

B.Anabolic.

C. Anabolic

D. Catabolic.

E.Anabolic

F. Catabolic

G. Anabolic

H. Catabolic

Explanation:

Catabolic process is a metabolic processes that breakdown complex or larger molecules into smaller sizes by releasing energy.

The examples of such metabolic processes are;

Glucose is used as the primary fuel for energy

Dietary carbohydrate from a meal is digested and absorbed as monosaccharides, mainly glucose

Dietary protein from a meal is digested and absorbed as single amino acids.

Fatty acids are used as fuel sources for some tissues.

All this processes are catabolic processes because large molecules are broken to smaller ones and all this processes release energy.

Anabolic process is a metabolic process where smaller molecular are build up to form larger molecules and this requires the input of energy.

Examples are;

Glucose is used as the primary fuel for energy

Excess glucose is stored as glycogen in the liver and muscle.

Excess glucose is converted to fatty acids and stored as part of the triglyceride molecule in adipose tissue

Excess tatty acids combine with glycerol to form which are stored in adipose tissues.

All these processes requires the build up of smaller molecules to larger molecules and requires input of energy.

3 0
3 years ago
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