1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
nexus9112 [7]
3 years ago
9

What does the pulmonary vein do?

Biology
2 answers:
Reika [66]3 years ago
6 0
The correct answer is D
Mila [183]3 years ago
3 0

Answer:

B, Carries Carbon dioxide-rich blood from the lungs to the heart

Explanation:

You might be interested in
What is different between humans and chimpanzees
Nesterboy [21]
Well Chimpanzees have a different living of humans. They also have a different habitat. They eat different food than a human would.
3 0
3 years ago
Read 2 more answers
The lac operon in E.coli regulates genes that code for enzymes required for breakdown of lactose. The lac operon is____ operon t
user100 [1]

Ans.

Lac (lactose) operon in a type of bacterial operon, which shows a cluster of genes that are regulated by a single promoter. It is composed of an operator, promoter, a terminator, and three structural genes (lacA, lacY, and lacZ), which are responsible for the transport and breakdown of lactose.

The lac operon is an inducible operon as it gets activated in the presence of lactose and expressed its functional genes in the form of proteins (or enzymes) for lactose metabolism.  

Thus, the correct answer to be fill in first blank is 'inducible' and in second blank is 'lactose.'

8 0
3 years ago
Read 2 more answers
Genes contain the instructions for building what molecules?
Alex_Xolod [135]
A gene is a small section of DNA?<span> that contains the instructions for a </span>specific<span>molecule, usually a </span>protein?. The purpose of genes?<span> is to store information. Each gene contains the information required to build </span>specific proteins<span> needed in an</span>organism<span>.</span>
4 0
3 years ago
Help! The is a question about enzymes.
gulaghasi [49]

ans is no 3

Explanation:

7 0
3 years ago
Two phenotypically tall heterozygous pea plants are crossed to one another. A phenotypically tall F1 progeny plant is randomly c
denis23 [38]

Answer:

The genotype of the randomly chosen F1 parent plant is "Tt"

Explanation:

Let "T" represents the allele for tall height characteristic of plant and "t" represents the allele for short height characteristic of plant.

Given -

Two phenotypically tall heterozygous pea plants are crossed to one another.

Genotype of tall heterozygous pea plants would be "Tt"

F1 Generation -

Tt * Tt

TT, Tt, Tt, tt

Now, it is given that a phenotypically tall F1 progeny plant is randomly chosen and mated to a phenotypically dwarf pea plant.

Genotype of phenotypically dwarf pea plant would be "tt"

Also, it is given that some of the F2 offspring from this mating are phenotypically dwarf this implies that progeny selected from F1 generation must have an allele for short height characteristics i.e "t"

Therefore,

in F2 generation cross will take between tt * Tt

thereby producing Tt, Tt, tt, tt

Therefore, the genotype of the randomly chosen F1 parent plant is "Tt"

5 0
3 years ago
Other questions:
  • What are organisms whose cells lack a membrane-bound nucleus called?
    5·1 answer
  • Which process provides the energy used to make ATP from ADP?
    14·2 answers
  • Human beings evolved during which era of geologic time?
    12·1 answer
  • What ways can ions enter the ocean
    14·2 answers
  • The net primary productivity is usually more than 80% of gross primary productivity.
    15·1 answer
  • Select the correct answer.
    13·2 answers
  • What was known before Franklin and Wilkins conducted their studies of DNA? Select three options.
    14·1 answer
  • What are the adaptive features of animal in rainforest
    13·1 answer
  • Caterpillars have hair-like bristles on the back side of their bodies. the bristles can be long or short. caterpillars with shor
    5·1 answer
  • When a population is spilt into smaller groups, why for these groups develop different traits?
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!