Answer:
In both groups, sperm swim from antheridia to archegonia
Explanation:
Bryophytes are the plant group that does not have a vascular system. These plants do not produce seeds. Ferns and horsetails are seedless vascular plants. These plants have vascular tissues (xylem and phloem) to serve in the conduction of water, minerals, and sugars from the one plant part to the other. But these plants do not produce seeds and hence, are seedless vascular plants.
Both bryophytes and the seedless vascular plants depend on water for fertilization. These plants release their male gametes in water which in turn move towards the female gamete. Sperms, the male gametes of these plants swim in the water to reach the female gamete.
Antheridium is the male gametangium that serves as a site for the production of male gametes while archegonia are the female gametangia where the egg cell is produced.
Answer:
A. Order is more specific than class
Explanation:
Family, Genus and Species comes after Order.
The correct answer is C. Plasma~
When a signal molecule binds a membrane receptor, different intracellular events occur in response. Option D is correct: All of the above.
<h3>
What is signals translation and how is it done?</h3>
Signal translation is the conversion global process of extracellular signals into intracellular responses. This porcess is done by a translator.
Translation might be
- INDIRECT ⇒ <u>Second messengers</u> participate in the signal translation, mediating between receptor and the cellular response.
The receptor-ligand union causes the production of second messengers that will activate effector proteins. Occurs an amplification of the signal.
- DIRECT ⇒ Occurs directly in the membrane.
<u>Ionic channel proteins</u> are activated and can change the chemical signal into an electric signal through ion flow.
When the molecule binds receptors that are associated with enzymes -or acting as enzymes- or to G proteins, it occurs a conformational change in the receptor cytoplasmic domain.
This change triggers an intracellular signal cascade in which many molecules participate and several<u> chemical changes</u> occur.
According to this framework, all the options are correct,
- The receptor can open an ion channel in the cell membrane.
- The receptor can act as an enzyme causing chemical changes in the cytoplasm.
- The receptor can cause the formation of a second messenger.
So te correct option is Option D. All of the above.
You can learn more about membrane receptors at
brainly.com/question/19371673
brainly.com/question/703787
We solve the problem using the Hardy-Wineberg equation.
Let us start with the homozygous dominant number of red toes trait,
∴ p² = 
= 0.4
We have the frequency for red toe trait as p = 
= 0.63
Solving for the frequency of white toe trait by using the fact that,
p + q = 1
∴ q = 1 - p = 1 - 0.63 = 0.37
Now we can calculate 2pq in p² + 2pq + q², which is the frequency for pink toes.
∴ 2pq = 2 x 0.63 x 0.37 = 0.47
Therefore, in a population of 1000 people, 47% have pink toes.
Hence 47% of 1000 will be 470.
The answer is 470.
