All categories

2 years ago

Tortoises found on the Galapagos Islands can have varied phenotypes. One of the variations in the phenotypes is with regard to

Biology

1 answer:

qwelly [4]2 years ago

8 0

Answer: B:The drought decreased the grass and vegetation on the ground, leaving only vegetation on shrubs and trees above the ground. Natural selection selected for the tortoises with the domed shells and hoods.

Explanation:

You might be interested in

A television advertisement claims that a certain brand of cough drop reduces coughing for 8 hours. Describe an investigation tha

Liono4ka [1.6K]

Answer:

See explanation below.

Explanation:

Study Design - Partially double-blinded study

The cohort study will be composed of 80 adults (aged ≥18 years) with a clinical diagnosis of constant coughing present as a result of a cold, which would be measured by semiautomated ambulatory cough monitor.

This study will be divided into an experimental group and a control group:

No medication (natural drops; e.g. water; saline solution) - Control group
Cough treatment - Experimental group

Data to be collected:

Participant cough will be recorded every hour (until 8 hours are reached) for two consecutive days (for repetitions) in both groups using semiautomated ambulatory cough monitor and analyzed statistically.

Observations:

Experimental group: If coughing is significantly (statistical analysis) reduced within the 8 hours (after repetitions) and a symptom improvement is observed, the hypothesis that cough drops are effective is valid.

Control group: To determine that cough drops treatment is effective, the no-treatment group should score worst and participant should not show significant improvement.

*In scientific experiments, repetitions are important to prevent bias and error.

6 0

3 years ago

The stringent response a.ensures that the cell has a large number of ribosomes for translation. b.occurs in response to sugars o

Nataly [62]

<h2>d) option is correct </h2>

Explanation:

The stringent response occurs in response to low energy store

For example when there is low level of lactose it means energy level is low so there will be no transcription of genes and hence transportation and catabolism of lactose will be inhibited

When E coli is grown in mixture of both glucose and lactose, at high glucose concentration the growth rate is maximum and lactose catabolism is repressed, this called as catabolite repression and it is due to level of cAMP

3 0

2 years ago

List three cash crops the europeans wanted the native americans and africans to yield

jeyben [28]

The cash crops are the crops, which has more commercial values as compared to the normal crops. The cash crops are essentially grown for the purpose selling.

The Europeans forced the native Americans and Africans to grow commercial crops, which include cocoa, peanuts, coffee, sugar,cotton, palm oil, rubber, tea, timber and tobacco. Out of which, tea, cotton and tobacco were the most forced cash crops.

Hence, the correct answer is tea, cotton and tobacco.

5 0

2 years ago

HCI+Na>NaCl+H2 what is the answer

kolezko [41]

Here's the balanced chemical equation for the given Reaction,

2 HCl + 2 Na =》2 NaCl + H2

i hope it helped you......

5 0

2 years ago

If a cell has a very large amount of ribosomes attached to its

Aleks04 [339]

Answer:

$\huge\boxed{Protein}$

Explanation:

Ribosomes are specialized to carry protein synthesis [Manufacture of protein]. Since, Ribosomes are attached to rough endoplasmic reticulum which means that the function of RER is also protein synthesis. If a cell has a very large amount of ribosomes attached to its rough endoplasmic reticulum, Then the cell will probably carry out the manufacture of protein.

Hope this helped!

<h2>~AnonymousHelper1807</h2>

7 0

2 years ago