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
horsena [70]
3 years ago
6

please help i do not understand and I'm struggling with these biology questions please help me will give 10 points) How are a se

ed coat a pollen grain and a spore wall adaptive structures?​
Biology
1 answer:
STALIN [3.7K]3 years ago
7 0

seed coat protects the cotyledons and embryo from outer environment and from attack of pathogens

pollen grain has a sculptors covering with weak points(germ pores) in it through which pollen tube comes out.

A spore is generally protected by 2-3 tough resistant walls around to tied over the unfavourable conditions.

You might be interested in
Why do vultures wait for there prey
RSB [31]

Answer:

A vulture attacks weak prey. They hunt by sight, so they often "watch over" the prey until it is ready, by their standards. ... Sometimes vultures wait for a larger feeder to attack the meat first, so that the meat is perfect for eating.

7 0
3 years ago
Read 2 more answers
With the help of labelled diagram explain the menstrual cycle in adolescent girls​
MissTica

Answer:

it is diagram okk

Explanation:

female reproductive system undergoes some changes and those changes repeat at interval of every 28-30 days. this repetative changes are called menstrual cycle. it is natural process, controlled by four hormones. those four hormones follicle stimulating hormone,luteinizing hormone, estrogen and progesterone. one of several follicle in ovary starts to develop along with oocyte present in it,under effect of follicle stimulating hormone. developing follicle secrets estrogen. endometrium of uterus starts to regenerate under effect of estrogen. it bursts under effect of luteinizing hormone and oocyte is released. this is ovulation. remaining tissues of burst follicle forms corpus luteum. corpus luteum starts to secrets progesterone. endometrial glands secrets their secretion under effect of progesterone. such endometrium is ready for implantation of embryo.

7 0
3 years ago
Which organelle is used as a temporary storage for Water, waste products, food, and other cellular material?
MAVERICK [17]
It is 100% the vacuole
3 0
3 years ago
Read 2 more answers
(I already know number 1)
Andrej [43]
2. All cells arise from pre existing cells(Rudolf Virchow). Cell is the fundamental, structural and functional unit of all organisms(Schleiden and Schwann).
3. All cells have a cell membrane.
All cells have chromosomes present.
All cells have cytoplasm.
4.Eukaryotic cells contain a nuclear membrane but Prokaryotic cells have only pseudo nucleus
Eukaryotic cells contain membrane bound organelles but prokaryotic cells don't.
5 0
3 years ago
Plz help i will report if it is wrong
Ostrovityanka [42]

Answer:

Your answer for this is D

6 0
3 years ago
Read 2 more answers
Other questions:
  • The cooled lava pools on the surface of a crater are called what?
    6·1 answer
  • Match the cell property descriptions with the correct organelle. Column A 1. Contains the genetic material (DNA): Contains the g
    11·1 answer
  • Which accident and health policy provision addresses preexisting conditions?
    11·1 answer
  • The picture shown is a food chain found in the Grand Basin desert in Nevada. Suppose a company that makes snakeskin wallets sets
    7·2 answers
  • A white-flowered plant is crossed with a red-flowered plant, and all of the offspring have pink flowers. this could be an exampl
    11·1 answer
  • The most complex organ in the human body is the
    8·1 answer
  • How do tumors form as a result of errors in mitosis
    9·1 answer
  • What are the possible genotypes of the parent of an offspring who has wavy (Wh) hair
    8·1 answer
  • Help me please its due in a hour
    14·1 answer
  • As the human population spread out of Africa into new regions, genetic diversity Group of answer choices went up as an adaptatio
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!