Question

Help in 8th Grade science

Answer 1

Some scientists studying aquatic plants notice that
flooding often leads to a decrease in the rate of
photosynthesis among aquatic plants. Flooding
causes more sediment to be suspended in the water.
The increased sediment concentration decreases
the amount of light that reaches the plants. Why
does a decreased rate of photosynthesis lead to a
decrease in a plant population?
A Less water is available for absorption.
B Less tissue is available for plant growth.
C Less energy is available for reproduction.
D Less soil is available for leaf development.

Answer 2

In a certain type of flowering plant, the b allele
codes for white-flower color, and the B allele
codes for blue-flower color. The flowering plant
produces a sex cell which includes a b gene.
Which of the following best represents a possible
genotype present in the parent plant’s cells?
A B
B b
C Bb
D BB

Answer 3

10 A scientist wanted to study a cell which lacked
the structure that contains the materials needed to
control cell activities. Which structure would need
to be missing from the cell for this study to take
place?
A nucleus
B vacuole
C lysosome
D mitochondrion
11 Which body system distributes nutrients to cells?
A circulatory
B endocrine
C respiratory
D integumentary
12 The doctor strikes the patient’s knee with a rubber
hammer and observes the reaction. The doctor is
checking the __________.
A Nervous System
B Muscular System
C Circulatory System
D Integumentary System

Answer 4

Which statement describes why an offspring and
its mother share many common traits?
A The mother and the offspring both have
mitochondria.
B The mother and the offspring both have
identical nuclei.
C The mother provided half of the offspring’s
chromosomes.
D The mother provided all of the offspring’s
chromosomes.
Page

Answer 5

Im sorry but this is not a place to post your questions and expect the answers

Answer 6

11 is A I think,
12 and 10 I know are A

That's all I'll help with, next time post one or 2 difficult questions, this is a place to help out others with hard questions, but we're not gonna do all your homework for you.

Answer 7

I'm guessing you're doing a unit test. BTW, I agree with Sylph-Of-Space