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
balu736 [363]
3 years ago
8

Which of the following statements is true about external and internal fertilization?

Biology
2 answers:
Mice21 [21]3 years ago
6 0

Answer: A. external fertilization doesn’t require sexual intercourse.

Explanation:

Fertilization is a process of fusion of the male and female gametes of the organisms so as to produce zygote a precursor of new life. In living beings the fertilization is of two types named as external and internal fertilization.

In external fertilization the fusion of the gametes of opposite sex takes place outside the body of the organism. It is used by some aquatic organisms like fishes they lay their eggs in water which are fused by the male sperms also released in water. In external fertilization no direct sexual intercourse takes place.

In internal fertilization the fusion of the male and female gamete takes place inside the body of the female mate. This occurs due to direct sexual intercourse between the male and female partners.

NeX [460]3 years ago
4 0

Answer:

A is correct external fertilisation doesn't require sexual intercourse

You might be interested in
g protein-activated inwardly rectifying potassium channels mediate depotentiation of long-term potentiation
Svetlanka [38]

Long-term potentiation (LTP) is considered a cellular correlate of learning and memory. The presence of G protein-activated inwardly rectifying K(+) (GIRK) channels near excitatory synapses on dendritic spines suggests their possible involvement in synaptic plasticity. However, whether activity-dependent regulation of  channels affects excitatory synaptic plasticity is unknown. In a companion article we have reported activity-dependent regulation of GIRK channel density in cultured hippocampal neurons that requires activity oF receptors (NMDAR) and protein phosphatase-1 (PP1) and takes place within 15 min. In this study, we performed whole-cell recordings of cultured hippocampal neurons and found that NMDAR activation increases basal GIRK current and GIRK channel activation mediated by adenosine A(1) receptors, but not GABA(B) receptors. Given the similar involvement of NMDARs, adenosine  receptors, and PP1 in depotentiation of LTP caused by low-frequency stimulation that immediately follows LTP-inducing high-frequency stimulation, we wondered whether NMDAR-induced increase in GIRK channel surface density and current may contribute to the molecular mechanisms underlying this specific depotentiation. Remarkably, GIRK2 null mutation or GIRK channel blockade abolishes depotentiation of LTP, demonstrating that GIRK channels are critical for depotentiation, one form of excitatory synaptic plasticity.

Learn more about receptors here:

brainly.com/question/11985070

#SPJ4

8 0
2 years ago
An excess of greenhouse gases is warming the oceans. Which of the following describes an effect of excess greenhouse gases?
Feliz [49]

Answer:

Melting of glaciers and ice sheets will cause coastlines to shrink and increase flooding.

5 0
2 years ago
Evidence is usually placed in a superglue _____ when developing the fingerprints.
xz_007 [3.2K]
Holder you just got to get the products
8 0
3 years ago
Organisms that brake down molecules to generate energy
Molodets [167]
Bacteria !!!!!!!!!!!!!!!!!!!!!
3 0
3 years ago
Read 2 more answers
When the lungs take in oxygen, they are functioning to collect oxygen for the body to use. When air is expelled from the lungs t
torisob [31]
The lungs are functioning to take carbon dioxide out of the body. Also known as exhaling.
3 0
3 years ago
Other questions:
  • Which organs are the long-term acid-base regulatory organs??
    13·1 answer
  • Cyanobacteria are photosynthetic marine organisms. why would these organisms likely be found only in shallow ocean zones?
    15·1 answer
  • Please help. Those are the only three options
    6·1 answer
  • leukemia patients sometimes recieve a bone marrow transplant to treat the cancer. explain why this treatment is effective​
    11·1 answer
  • The statement “ The worm is 2 centimeters long” is a a.observation b.theory c.inference d.hypothesis
    6·1 answer
  • Which of the following correctly describes the components of DNA ?
    15·1 answer
  • PLEASE HELP 1 QUESTION
    5·1 answer
  • Multicellular organisms are able to develop into full grown adults from a single cell because of the process of –
    8·1 answer
  • Helllllllp plsssssssssss
    11·2 answers
  • If the anterior pituitary began overproducing FSH due to a tumor, and it no longer responds to normal feedback mechanisms; what
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!